From ronja at tobias-conradi.de  Sat Oct  4 21:01:49 2008
From: ronja at tobias-conradi.de (toco)
Date: Sat, 4 Oct 2008 22:01:49 +0200
Subject: [Ronja] Twister not workling
Message-ID: <FEF9EDC4-5C73-41D2-93FC-089CAE4623E2@tobias-conradi.de>

Me and my friend have built 2 Ronja but the twisters aren't working.
The Twister was built with the circuit layout from the 28th August  
2004 on a dot matrix board.
All connections have been tested three times. The ICs got current.
Is it possible that there is an bug in the layout?
The Twister isn't working.
IC U66 and U67 got +9V DC on Port 0
The quarz is oscillating correctly.
The test-routine doesn't recognize the connected twister.
Does anybody know important voltages of the ICs.
We got an Oscilloscope.
Which IC generates and sends the link status to the computer?
Which Singals shoult be at whitch port at the ICs, espacially IC U58  
and U62.

I hope you can help me,
toco
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From twibright at hispeed.ch  Sun Oct  5 08:27:55 2008
From: twibright at hispeed.ch (Karel Kulhavy)
Date: Sun, 5 Oct 2008 9:27:55 +0200
Subject: [Ronja] Twister not workling
Message-ID: <1552476.1223191675530.JavaMail.root@viefep17>

---- toco <ronja at tobias-conradi.de> schrieb:
> Me and my friend have built 2 Ronja but the twisters aren't working.
> The Twister was built with the circuit layout from the 28th August  
> 2004 on a dot matrix board.

Do you mean this? http://en.wikipedia.org/wiki/Stripboard
If it's built on a stripboard then it will not work. Ronja is sensitive to
high frequency parameters of the construction.

> All connections have been tested three times. The ICs got current.
> Is it possible that there is an bug in the layout?
> The Twister isn't working.
> IC U66 and U67 got +9V DC on Port 0

What is port 0? If U66 and 67 (HC133) have 9V somewhere on them then they are already
probably dead - looks like a wiring mistake or regulator failure.

Karel
> The quarz is oscillating correctly.
> The test-routine doesn't recognize the connected twister.
> Does anybody know important voltages of the ICs.
> We got an Oscilloscope.
> Which IC generates and sends the link status to the computer?
> Which Singals shoult be at whitch port at the ICs, espacially IC U58  
> and U62.
> 
> I hope you can help me,
> toco



From twibright at hispeed.ch  Sun Oct  5 12:06:49 2008
From: twibright at hispeed.ch (Karel Kulhavy)
Date: Sun, 5 Oct 2008 13:06:49 +0200
Subject: [Ronja] Good analogue oscilloscopes
Message-ID: <13030462.1223204809820.JavaMail.root@viefep17>

The Ronja project has 10 years so I am thiking about buying a birthday present - a
used analogue oscilloscope around 100 MHz bandwidth.

Can you recommend which ones are good and which ones to avoid? What to check when
buying one? I developed the Ronja 10M Receiver on a 100MHz Iwatsu (borrowed) back in 2001.

Greetings,

Karel



From twibright at hispeed.ch  Sun Oct  5 13:05:58 2008
From: twibright at hispeed.ch (Karel Kulhavy)
Date: Sun, 5 Oct 2008 14:05:58 +0200
Subject: [Ronja] pcapified BERTEST
Message-ID: <18420907.1223208358923.JavaMail.root@viefep17>

Hi Bruce,

---- Bruce M Simpson <bms at incunabulum.net> schrieb:
> Here is a pcapified bertest for FreeBSD.

I finally managed to get to this. I installed pcap and tried to compile on
Linux From Scratch and am still
getting these 2 error messages:
clock at sandy:~$ gcc bertest-pcap.c 
bertest-pcap.c:15:23: error: net/if_dl.h: No such file or directory
bertest-pcap.c:16:26: error: net/if_types.h: No such file or directory

I googled for net/if_dl.h but didn't find a hint how to fix it in the first few
results. Do you know what needs to be installed?

Karel
> 
> I have performed no other testing other than compilation and packet send 
> on FreeBSD, nor have I ported any of the Linux/bash specific test 
> scripts to other operating systems.
> 
> It should probably build on MacOS X and other BSDs with minimal changes. 
> Windows usage will require that the mac address function is hacked to 
> use IPHLPAPI.DLL, this is a minimal change.
> 
> The test scripts themselves look like they need to be ported to a POSIX 
> compiant shell to work with other operating systems.
> 
> cheers
> BMS



From bms at incunabulum.net  Tue Oct  7 06:13:48 2008
From: bms at incunabulum.net (Bruce M Simpson)
Date: Tue, 07 Oct 2008 06:13:48 +0100
Subject: [Ronja] pcapified BERTEST
In-Reply-To: <18420907.1223208358923.JavaMail.root@viefep17>
References: <18420907.1223208358923.JavaMail.root@viefep17>
Message-ID: <48EAF00C.1080804@incunabulum.net>

Karel Kulhavy wrote:
> I finally managed to get to this. I installed pcap and tried to compile on
> Linux From Scratch and am still
> getting these 2 error messages:
> clock at sandy:~$ gcc bertest-pcap.c 
> bertest-pcap.c:15:23: error: net/if_dl.h: No such file or directory
> bertest-pcap.c:16:26: error: net/if_types.h: No such file or directory
>   

Those are FreeBSD header files, you might not need them for LFS.
Wrapping them with "#ifdef __FreeBSD__" might be OK.

thanks
BMS


From hybrid.parameter at yahoo.com  Tue Oct  7 18:22:54 2008
From: hybrid.parameter at yahoo.com (Saad Shakeel)
Date: Tue, 7 Oct 2008 10:22:54 -0700 (PDT)
Subject: [Ronja] twister 1 pcbs
In-Reply-To: <48EAF00C.1080804@incunabulum.net>
Message-ID: <149628.13084.qm@web44902.mail.sp1.yahoo.com>

Hello there,
?
Can anyone tell me of someone?supplying Twister 1 ?PCBs. 
?
If someone out there sells them, please do let me know.
?
Thanks,
?
Saad


      
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From twibright at hispeed.ch  Sun Oct 12 12:08:02 2008
From: twibright at hispeed.ch (Karel Kulhavy)
Date: Sun, 12 Oct 2008 13:08:02 +0200
Subject: [Ronja] Availability of transistors for new Ronja amplifier
Message-ID: <7701304.1223809682742.JavaMail.root@viefep16>

Hello

I am designing a new Ronja amplifier and with 2N3904 I would need too many transistors,
too many components. BFR91A  seems to be suitable.
Is it available from your supply? It's sold under name BFR91A, BFR93A, BFP93A, or BFR93W.

Karel


From bms at incunabulum.net  Mon Oct 13 04:18:29 2008
From: bms at incunabulum.net (Bruce M. Simpson)
Date: Mon, 13 Oct 2008 04:18:29 +0100
Subject: [Ronja] Availability of transistors for new Ronja amplifier
In-Reply-To: <7701304.1223809682742.JavaMail.root@viefep16>
References: <7701304.1223809682742.JavaMail.root@viefep16>
Message-ID: <48F2BE05.5050106@incunabulum.net>

Karel Kulhavy wrote:
> Hello
>
> I am designing a new Ronja amplifier and with 2N3904 I would need too many transistors,
> too many components. BFR91A  seems to be suitable.
> Is it available from your supply? It's sold under name BFR91A, BFR93A, BFP93A, or BFR93W.
>   

A quick search reveals Farnell UK and RS UK have the BFR93A, but none of 
the others.
Rapid do not have any of the parts listed.


From ronja at tobias-conradi.de  Mon Oct 13 18:05:03 2008
From: ronja at tobias-conradi.de (toco)
Date: Mon, 13 Oct 2008 19:05:03 +0200
Subject: [Ronja] twister 1 pcbs
In-Reply-To: <149628.13084.qm@web44902.mail.sp1.yahoo.com>
References: <149628.13084.qm@web44902.mail.sp1.yahoo.com>
Message-ID: <8F6ED4D5-3EF9-4B8C-8F4C-5E34F70F7E6D@tobias-conradi.de>

I asked the owner of ronjashop.com if he could send me Twister 1 PCBs.
I will tell you when I get an answer.

toco


Am 07.10.2008 um 19:22 schrieb Saad Shakeel:

> Hello there,
>
> Can anyone tell me of someone supplying Twister 1  PCBs.
>
> If someone out there sells them, please do let me know.
>
> Thanks,
>
> Saad
>
> -- 
> Twibright Ronja mailing list http://ronja.twibright.com
> Ronja at lists.pointless.net
> http://pointless.net/mailman/listinfo/ronja

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From lepiaf at bgwireless.net  Mon Oct 13 18:44:20 2008
From: lepiaf at bgwireless.net (Vladimir Obradovic)
Date: Mon, 13 Oct 2008 19:44:20 +0200
Subject: [Ronja] Availability of transistors for new Ronja amplifier
In-Reply-To: <mailman.1.1223895601.19915.ronja@lists.pointless.net>
References: <mailman.1.1223895601.19915.ronja@lists.pointless.net>
Message-ID: <571115236.20081013194420@bgwireless.net>

> I am designing a new Ronja amplifier and with 2N3904 I would need too many transistors,
> too many components. BFR91A  seems to be suitable.
> Is it available from your supply? It's sold under name BFR91A, BFR93A, BFP93A, or BFR93W.
> Karel

BFR91,BFR91A and BFR93A can be found here (Belgrade, Serbia) from
local supplier. Sounds to me like reasonable priced, around 0.3eu for
91 series (for 10+ pcs) and 0.16eu for BFR93A. Could not find other
two models.

LePiaf



From kubajz at kbx.cz  Mon Oct 13 19:36:16 2008
From: kubajz at kbx.cz (Jakub Sykora)
Date: Mon, 13 Oct 2008 20:36:16 +0200
Subject: [Ronja] Availability of transistors for new Ronja amplifier
In-Reply-To: <7701304.1223809682742.JavaMail.root@viefep16>
References: <7701304.1223809682742.JavaMail.root@viefep16>
Message-ID: <48F39520.4010601@kbx.cz>

In CZ it is available from GES (www.ges.cz) for about 8 CZK and also 
from GME (www.gme.cz) for about 9 CZK.
The transistor has interesting parameters... CE - 12V, CB 20V and EB 2V 
and high temperature range...

K

Karel Kulhavy wrote:
> Hello
> 
> I am designing a new Ronja amplifier and with 2N3904 I would need too many transistors,
> too many components. BFR91A  seems to be suitable.
> Is it available from your supply? It's sold under name BFR91A, BFR93A, BFP93A, or BFR93W.
> 
> Karel
> 

-- 
Jakub S?kora
email: kubajz na kbx.cz       <')
ICQ: 68976632               ( =-
mobil: +420 777 594 201      ''


From twibright at hispeed.ch  Mon Oct 13 21:25:19 2008
From: twibright at hispeed.ch (Karel Kulhavy)
Date: Mon, 13 Oct 2008 22:25:19 +0200
Subject: [Ronja] Availability of transistors for new Ronja amplifier
Message-ID: <22094391.1223929519669.JavaMail.root@viefep18>

---- Jakub Sykora <kubajz at kbx.cz> schrieb:
> In CZ it is available from GES (www.ges.cz) for about 8 CZK and also 
> from GME (www.gme.cz) for about 9 CZK.
> The transistor has interesting parameters... CE - 12V, CB 20V and EB 2V 
> and high temperature range...

EB 2V? OMG... Good that you have pointed it out. I will have to make sure the previous
stage will not kill the next one when it goes to clipping!

Karel



From twibright at hispeed.ch  Tue Oct 14 09:42:22 2008
From: twibright at hispeed.ch (Karel Kulhavy)
Date: Tue, 14 Oct 2008 10:42:22 +0200
Subject: [Ronja] Spectral analyzer up to 8 GHz
Message-ID: <20654591.1223973742934.JavaMail.root@viefep11.chello.at>

Due to low achievable gain I had to upgrade the 2N3904 in the design (Ft=300 MHz)
to BFR90/91/91A (5GHz). 2N3904 oscillated at 500 MHz so I expect these to oscillate at
8GHz. Does anyone has a spectral analyzer like this or a scanner (communications
receiver)? When I build the limiting amplifier cell I have to check it doesn't
oscillate.

Or do you know any technique how to check for oscillation without such high frequency instruments?

Karel



From antitron at web.de  Tue Oct 14 12:36:42 2008
From: antitron at web.de (Thomas Egenhofer)
Date: Tue, 14 Oct 2008 13:36:42 +0200
Subject: [Ronja] Availability of transistors for new Ronja amplifier
In-Reply-To: <mailman.1.1223895601.19915.ronja@lists.pointless.net>
References: <mailman.1.1223895601.19915.ronja@lists.pointless.net>
Message-ID: <1223984202.6314.3.camel@Nekomimi-host>

?BFR91A and BFR93A are available in germany from reichelt.de ranging
from 0.14 to 0.28?
they ship pretty much every country, minimum order for non-germany is
150?



From gmaxwell at gmail.com  Tue Oct 14 16:04:29 2008
From: gmaxwell at gmail.com (Gregory Maxwell)
Date: Tue, 14 Oct 2008 11:04:29 -0400
Subject: [Ronja] Spectral analyzer up to 8 GHz
In-Reply-To: <20654591.1223973742934.JavaMail.root@viefep11.chello.at>
References: <20654591.1223973742934.JavaMail.root@viefep11.chello.at>
Message-ID: <e692861c0810140804q7c14a53cs3852b892d80c07e6@mail.gmail.com>

On Tue, Oct 14, 2008 at 4:42 AM, Karel Kulhavy <twibright at hispeed.ch> wrote:
> Due to low achievable gain I had to upgrade the 2N3904 in the design (Ft=300 MHz)
> to BFR90/91/91A (5GHz). 2N3904 oscillated at 500 MHz so I expect these to oscillate at
> 8GHz. Does anyone has a spectral analyzer like this or a scanner (communications
> receiver)? When I build the limiting amplifier cell I have to check it doesn't
> oscillate.
>
> Or do you know any technique how to check for oscillation without such high frequency instruments?

I wonder if you could get a confident idea if its self-oscillating by
simply measuring the current draw?


From twibright at hispeed.ch  Tue Oct 14 21:08:31 2008
From: twibright at hispeed.ch (Karel Kulhavy)
Date: Tue, 14 Oct 2008 22:08:31 +0200
Subject: [Ronja] Spectral analyzer up to 8 GHz
Message-ID: <8443772.1224014911656.JavaMail.root@viefep17>

---- Gregory Maxwell <gmaxwell at gmail.com> schrieb:
> On Tue, Oct 14, 2008 at 4:42 AM, Karel Kulhavy <twibright at hispeed.ch> wrote:
> > Due to low achievable gain I had to upgrade the 2N3904 in the design (Ft=300 MHz)
> > to BFR90/91/91A (5GHz). 2N3904 oscillated at 500 MHz so I expect these to oscillate at
> > 8GHz. Does anyone has a spectral analyzer like this or a scanner (communications
> > receiver)? When I build the limiting amplifier cell I have to check it doesn't
> > oscillate.
> >
> > Or do you know any technique how to check for oscillation without such high frequency instruments?
> 
> I wonder if you could get a confident idea if its self-oscillating by
> simply measuring the current draw?

Unfortunately not - the current draw will be enforced to a preprogrammed value by current sources.

Karel



From twibright at hispeed.ch  Wed Oct 15 09:49:15 2008
From: twibright at hispeed.ch (Karel Kulhavy)
Date: Wed, 15 Oct 2008 10:49:15 +0200
Subject: [Ronja] Spectral analyzer up to 8 GHz
Message-ID: <7865787.1224060555133.JavaMail.root@viefep11.chello.at>

---- Gregory Maxwell <gmaxwell at gmail.com> schrieb:
> On Tue, Oct 14, 2008 at 4:08 PM, Karel Kulhavy <twibright at hispeed.ch> wrote:
> ---- Gregory Maxwell <gmaxwell at gmail.com> schrieb:
>> On Tue, Oct 14, 2008 at 4:42 AM, Karel Kulhavy <twibright at hispeed.ch> wrote:
>> > Due to low achievable gain I had to upgrade the 2N3904 in the design (Ft=300 MHz)
>> > to BFR90/91/91A (5GHz). 2N3904 oscillated at 500 MHz so I expect these to oscillate at
>> > 8GHz. Does anyone has a spectral analyzer like this or a scanner (communications
>> > receiver)? When I build the limiting amplifier cell I have to check it doesn't
>> > oscillate.
>> >
>> > Or do you know any technique how to check for oscillation without such high frequency instruments?
>>
>> I wonder if you could get a confident idea if its self-oscillating by
>> simply measuring the current draw?
>
> Unfortunately not - the current draw will be enforced to a preprogrammed value by current sources.

> I would expect that your traces would have enough enough induction to
prevent the system from having above unity gain at 8 GHz ? but I guess
you need the test equipment to be sure of that then. :(

I have tested the stability in a simulator. Put estimates ranging from 5nH to 60nH
depending on length of trace. Denis L Feucht from Tektronix claims Tektronix used a rule of thumb estimate of 10nH per cm of trace.

The circuit seems to be perfectly stable. Neither the input circuit nor the emitter
capacitor nor the power supply sees any negative resistance at any frequency. I still
have to test for stability in a clipped state with the coils (I tested just without
coils) and also check what effect the coils will have on bandwidth.

Do you know the Supaplex game? 
http://archive.gp2x.de/cfiles/screenshots/supaplex.png
All what is missing here is the pacman eating resistors
and transistors and coils falling on his head:

http://ronja.twibright.com/sim/stab90.png
http://ronja.twibright.com/sim/stab90_s.png

Karel



From antitron at web.de  Wed Oct 15 12:14:24 2008
From: antitron at web.de (Thomas Egenhofer)
Date: Wed, 15 Oct 2008 13:14:24 +0200
Subject: [Ronja] Spectral analyzer up to 8 GHz
In-Reply-To: <mailman.1.1224068401.10627.ronja@lists.pointless.net>
References: <mailman.1.1224068401.10627.ronja@lists.pointless.net>
Message-ID: <1224069264.6630.1.camel@Nekomimi-host>

how about connecting it to an actual oscilating circuit and see if it
resonates? with given values for the oscillating circuit one might be
able to vaguely guess around what frequency the oscillation is.
just an idea thought.

On Wed, 2008-10-15 at 12:00 +0100, ronja-request at lists.pointless.net
wrote:
> 
> > > Or do you know any technique how to check for oscillation without
> such high frequency instruments?



From hybrid.parameter at yahoo.com  Fri Oct 17 06:08:02 2008
From: hybrid.parameter at yahoo.com (Saad Shakeel)
Date: Thu, 16 Oct 2008 22:08:02 -0700 (PDT)
Subject: [Ronja] twister 1 pcbs
In-Reply-To: <8F6ED4D5-3EF9-4B8C-8F4C-5E34F70F7E6D@tobias-conradi.de>
Message-ID: <660916.98872.qm@web44913.mail.sp1.yahoo.com>

Thanks man! 
?
Eagerly waiting for your reply.

--- On Mon, 10/13/08, toco <ronja at tobias-conradi.de> wrote:

From: toco <ronja at tobias-conradi.de>
Subject: Re: [Ronja] twister 1 pcbs
To: "Twibright Ronja" <ronja at lists.pointless.net>
Date: Monday, October 13, 2008, 10:05 AM


I asked the owner of ronjashop.com if he could send me Twister 1 PCBs.
I will tell you when I get an answer.


toco






Am 07.10.2008 um 19:22 schrieb Saad Shakeel:






Hello there,
?
Can anyone tell me of someone?supplying Twister 1 ?PCBs. 
?
If someone out there sells them, please do let me know.
?
Thanks,
?
Saad
-- 
Twibright Ronja mailing list http://ronja.twibright.com
Ronja at lists.pointless.net
http://pointless.net/mailman/listinfo/ronja

-- 
Twibright Ronja mailing list http://ronja.twibright.com
Ronja at lists.pointless.net
http://pointless.net/mailman/listinfo/ronja



      
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From ronja at tobias-conradi.de  Fri Oct 17 11:17:50 2008
From: ronja at tobias-conradi.de (toco)
Date: Fri, 17 Oct 2008 12:17:50 +0200
Subject: [Ronja] twister 1 pcbs
In-Reply-To: <660916.98872.qm@web44913.mail.sp1.yahoo.com>
References: <660916.98872.qm@web44913.mail.sp1.yahoo.com>
Message-ID: <602DA617-27C5-4A37-B93C-599673701F84@tobias-conradi.de>

Here his Answer:

> I'm very sorry but this is very long ago I've seen last Twister 1 PCB.
> I'm afraid your only option is buy components which differ and build
> the Two.



Am 17.10.2008 um 07:08 schrieb Saad Shakeel:

> Thanks man!
>
> Eagerly waiting for your reply.

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From hybrid.parameter at yahoo.com  Sat Oct 18 15:33:20 2008
From: hybrid.parameter at yahoo.com (Saad Shakeel)
Date: Sat, 18 Oct 2008 07:33:20 -0700 (PDT)
Subject: [Ronja] Single sided PCB for twister?
In-Reply-To: <1224069264.6630.1.camel@Nekomimi-host>
Message-ID: <980859.17567.qm@web44906.mail.sp1.yahoo.com>

Hi everyone,
?
We're in serious trouble here, trying to work on the Twister 1 design..... Since its a double sided design , there are very few people who make them here... and the price they're asking is astronomical !!!
?
Can?anyone tell us of a Twister? design that can be implemented on a single sided PCB?? i think the twister 2 is double sided too as it has a component and solder side masks aswell.
?
Plz help.. Thanks
?
Saad
?
?

__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com 
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From cd930 at centrum.cz  Sun Oct 19 12:31:40 2008
From: cd930 at centrum.cz (CD930)
Date: Sun, 19 Oct 2008 13:31:40 +0200
Subject: [Ronja] Power is power
Message-ID: <28880DE2A5DB43C8813613C9FB8701AD@Martindoma>

Hi all.
I tested Luxeon LED 10W/730mA/450LM/120 degre.

Love is love and power is POWER :)

Martin OK1MJO   -=RYS=-

 
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From xask.linus at gmail.com  Sun Oct 19 14:38:07 2008
From: xask.linus at gmail.com (Deepak Mishra)
Date: Sun, 19 Oct 2008 19:08:07 +0530
Subject: [Ronja] Single sided PCB for twister?
In-Reply-To: <980859.17567.qm@web44906.mail.sp1.yahoo.com>
References: <1224069264.6630.1.camel@Nekomimi-host>
	<980859.17567.qm@web44906.mail.sp1.yahoo.com>
Message-ID: <3722a3330810190638k1106cbb5uafa890d56fdd94e5@mail.gmail.com>

I will be making a RONJA pair for myself using professional PCBs this time.
Yes both Twister 1 & 2 are double sided so making a home made PCB would be
tricky, but can be done with some efforts. The other problem is drilling
holes, for which you have to give it to a professional CNC driller.

I will be ordering the PCBs and some other parts from New Delhi. PCB
manufacturing is expensive for small orders in other parts of the country.
New Delhi rates can be upto 10 times cheaper ! I will be requesting a
quotation from various PCB manufacturers, and will forward it to you. I will
courier the PCBs to you if you are interested. I will forward you a pdf
quotation I recieved form a manufacturer in Delhi. His rates were reasonable

Regards,
Xask


On 18/10/2008, Saad Shakeel <hybrid.parameter at yahoo.com> wrote:
>
>   Hi everyone,
>
> We're in serious trouble here, trying to work on the Twister 1 design.....
> Since its a double sided design , there are very few people who make them
> here... and the price they're asking is astronomical !!!
>
> Can anyone tell us of a Twister  design that can be implemented on a single
> sided PCB?? i think the twister 2 is double sided too as it has a component
> and solder side masks aswell.
>
> Plz help.. Thanks
>
> Saad
>
>
>
> __________________________________________________
> Do You Yahoo!?
> Tired of spam? Yahoo! Mail has the best spam protection around
> http://mail.yahoo.com
> --
> Twibright Ronja mailing list http://ronja.twibright.com
> Ronja at lists.pointless.net
> http://pointless.net/mailman/listinfo/ronja
>
>
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From xask.linus at gmail.com  Sun Oct 19 15:20:46 2008
From: xask.linus at gmail.com (Deepak Mishra)
Date: Sun, 19 Oct 2008 19:50:46 +0530
Subject: [Ronja] Power is power
In-Reply-To: <28880DE2A5DB43C8813613C9FB8701AD@Martindoma>
References: <28880DE2A5DB43C8813613C9FB8701AD@Martindoma>
Message-ID: <3722a3330810190720gd65eb81icfa000ffba72bc94@mail.gmail.com>

what are the range improvements ?

On 19/10/2008, CD930 <cd930 at centrum.cz> wrote:
>
>  Hi all.
> I tested Luxeon LED 10W/730mA/450LM/120 degre.
>
> Love is love and power is POWER :)
>
> Martin OK1MJO   -=RYS=-
>
>
>
> --
> Twibright Ronja mailing list http://ronja.twibright.com
> Ronja at lists.pointless.net
> http://pointless.net/mailman/listinfo/ronja
>
>
>
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From twibright at hispeed.ch  Sun Oct 19 16:19:40 2008
From: twibright at hispeed.ch (Karel Kulhavy)
Date: Sun, 19 Oct 2008 17:19:40 +0200
Subject: [Ronja] Power is power
Message-ID: <13721756.1224429580332.JavaMail.root@viefep17>

---- CD930 <cd930 at centrum.cz> schrieb:
> Hi all.
> I tested Luxeon LED 10W/730mA/450LM/120 degre.

Do they already make 10W Luxeons? Do you have a link to the datasheet?

Karel



From twibright at hispeed.ch  Sun Oct 19 16:21:15 2008
From: twibright at hispeed.ch (Karel Kulhavy)
Date: Sun, 19 Oct 2008 17:21:15 +0200
Subject: [Ronja] Single sided PCB for twister?
Message-ID: <11182662.1224429675432.JavaMail.root@viefep17>

---- Saad Shakeel <hybrid.parameter at yahoo.com> schrieb:
> Hi everyone,
>  
> We're in serious trouble here, trying to work on the Twister 1 design..... Since its a double sided design , there are very few people who make them here... and the price they're asking is astronomical !!!
>  
> Can anyone tell us of a Twister  design that can be implemented on a single sided PCB?? i think the twister 2 is double sided too as it has a component and solder side masks aswell.

There is only one Twister design and that is double sided. If you have problem getting
the PCBs I would recommend order Twister2 from ronjashop.com. They have good prices.

Karel
>  


From discover at fly.srk.fer.hr  Sun Oct 19 22:12:14 2008
From: discover at fly.srk.fer.hr (Silvije)
Date: Sun, 19 Oct 2008 23:12:14 +0200 (CEST)
Subject: [Ronja] Power is power
In-Reply-To: <13721756.1224429580332.JavaMail.root@viefep17>
References: <13721756.1224429580332.JavaMail.root@viefep17>
Message-ID: <Pine.LNX.4.64.0810192308170.6290@fly.srk.fer.hr>


That is no Luxeon LED IMHO,
and it emitts white light, am I correct?
similar are those http://www.artas.hr/LED/LED.htm
up to 100W

but best white LED I have tested is ssc p7 no doubt
http://www.dealextreme.com/details.dx/sku.12721

greetz,
s.

On Sun, 19 Oct 2008, Karel Kulhavy wrote:

> ---- CD930 <cd930 at centrum.cz> schrieb:
>> Hi all.
>> I tested Luxeon LED 10W/730mA/450LM/120 degre.
>
> Do they already make 10W Luxeons? Do you have a link to the datasheet?
>
> Karel
>
>
> -- 
> Twibright Ronja mailing list http://ronja.twibright.com
> Ronja at lists.pointless.net
> http://pointless.net/mailman/listinfo/ronja
>


From pedro.lopezestepa at epfl.ch  Mon Oct 20 10:25:55 2008
From: pedro.lopezestepa at epfl.ch (pedro.lopezestepa at epfl.ch)
Date: Mon, 20 Oct 2008 11:25:55 +0200
Subject: [Ronja] Ronja Low Distance
Message-ID: <20081020112555.h123tq41wkswgcws@webmail.epfl.ch>

Hello,

I have a question to do Ronja in low distance without lents. Do you  
know if its posible to scale?

Thanks.


From twibright at hispeed.ch  Mon Oct 20 15:23:04 2008
From: twibright at hispeed.ch (Karel Kulhavy)
Date: Mon, 20 Oct 2008 16:23:04 +0200
Subject: [Ronja] Ronja Low Distance
Message-ID: <12978014.1224512584887.JavaMail.root@viefep11.chello.at>

---- pedro.lopezestepa at epfl.ch schrieb:
> Hello,
> 
> I have a question to do Ronja in low distance without lents. Do you  
> know if its posible to scale?

Without lens Ronja goes only about 2 meters, see the Ronja testing procedure http://ronja.twibright.com/testing/ned_tetrapolis.php

With scale do you think improve this distance without lens? One could use multiple transmitters or a photodiode with a greater area. 
The architecture of the Ronja receiver allows arbitrarily high photodiode capacitance.

Karel



From cd930 at centrum.cz  Mon Oct 20 15:59:34 2008
From: cd930 at centrum.cz (CD930)
Date: Mon, 20 Oct 2008 16:59:34 +0200
Subject: [Ronja] Power is power
References: <13721756.1224429580332.JavaMail.root@viefep17>
	<Pine.LNX.4.64.0810192308170.6290@fly.srk.fer.hr>
Message-ID: <96695BA5DCCC470396A4B26A319DBC2D@Martindoma>

Yes Silvije and others.
It is Luxeon LED white 360-450lm 6500-8000K 120? 700mA 10W 12-15V.
http://www.gme.cz/_dokumentace/dokumenty/511/511-891/dsh.511-891.1.pdf
http://www.gme.cz/cz/index.php?page=product&detail=511-891



.
Testing for normal residential lighting, but before yesterday I joined her 
on the HF radio test modulating properties.
Squeamish light and modulating without major distortion to 22MHz.
There is also red, but I do not know if he would have passed through optics. 
Case has a 6 array field.
That my contribution please file as hyperbole but at the same time as 
instructed on the international manufacturer of sleep and are beginning to 
offer truly enforced LEDs.

Why I bought this and other types is that I deal with 12V program for home 
lighting.
See:  http://picasaweb.google.com/ok1mjo/LEDOsvTlen#


Martin




----- Original Message ----- 
From: "Silvije" <discover na fly.srk.fer.hr>
To: "Twibright Ronja" <ronja na lists.pointless.net>
Sent: Sunday, October 19, 2008 11:12 PM
Subject: Re: [Ronja] Power is power


>
> That is no Luxeon LED IMHO,
> and it emitts white light, am I correct?
> similar are those http://www.artas.hr/LED/LED.htm
> up to 100W
>
> but best white LED I have tested is ssc p7 no doubt
> http://www.dealextreme.com/details.dx/sku.12721
>
> greetz,
> s.
>
> On Sun, 19 Oct 2008, Karel Kulhavy wrote:
>
>> ---- CD930 <cd930 na centrum.cz> schrieb:
>>> Hi all.
>>> I tested Luxeon LED 10W/730mA/450LM/120 degre.
>>
>> Do they already make 10W Luxeons? Do you have a link to the datasheet?
>>
>> Karel
>>
>>
>> -- 
>> Twibright Ronja mailing list http://ronja.twibright.com
>> Ronja na lists.pointless.net
>> http://pointless.net/mailman/listinfo/ronja
>>
>
> -- 
> Twibright Ronja mailing list http://ronja.twibright.com
> Ronja na lists.pointless.net
> http://pointless.net/mailman/listinfo/ronja
>
> 
------------- dal?? ??st ---------------
Netextov? p??loha byla odstran?na...
Jm?no: [??dn? popis nen? k dispozici]
Typ: image/jpeg
Velikost: 2095 bytes
Popis: [??dn? popis nen? k dispozici]
Url : http://pointless.net/pipermail/ronja/attachments/20081020/63c6d77b/attachment.jpe 

From asteri_x at freemail.hu  Mon Oct 20 21:38:35 2008
From: asteri_x at freemail.hu (=?UTF-8?B?R3l1cmvDsyBNYXJ0aW4=?=)
Date: Mon, 20 Oct 2008 22:38:35 +0200
Subject: [Ronja] Power is power
In-Reply-To: <96695BA5DCCC470396A4B26A319DBC2D@Martindoma>
References: <13721756.1224429580332.JavaMail.root@viefep17>	<Pine.LNX.4.64.0810192308170.6290@fly.srk.fer.hr>
	<96695BA5DCCC470396A4B26A319DBC2D@Martindoma>
Message-ID: <48FCEC4B.6030808@freemail.hu>

I think with white light you are not able to get into the focus point, 
if your lenses are cheap ones.(Achromatic)
if you only have one wavelegth it is easy to get into the focus.

Martin


From einer.aus.der.klasse at kilian-kiekenap.de  Mon Oct 20 22:40:39 2008
From: einer.aus.der.klasse at kilian-kiekenap.de (Kilian Kiekenap)
Date: Mon, 20 Oct 2008 23:40:39 +0200
Subject: [Ronja] What about using a polarizer?
Message-ID: <200810202340.39537.einer.aus.der.klasse@kilian-kiekenap.de>

Hello,

I often thought about how to make Ronja 100mbit. I think the main problem is 
to get the nrz-code over the optical link. So I thought it would perhaps be 
possible to use two transmitters with different polarization and two 
receivers which can receive them independently. So you could get four 
different symbols.

Just a thought...

Kilian


From gmaxwell at gmail.com  Mon Oct 20 22:55:50 2008
From: gmaxwell at gmail.com (Gregory Maxwell)
Date: Mon, 20 Oct 2008 17:55:50 -0400
Subject: [Ronja] What about using a polarizer?
In-Reply-To: <200810202340.39537.einer.aus.der.klasse@kilian-kiekenap.de>
References: <200810202340.39537.einer.aus.der.klasse@kilian-kiekenap.de>
Message-ID: <e692861c0810201455m38f880c4u8d206bd92c405b13@mail.gmail.com>

On Mon, Oct 20, 2008 at 5:40 PM, Kilian Kiekenap
<einer.aus.der.klasse at kilian-kiekenap.de> wrote:
> Hello,
>
> I often thought about how to make Ronja 100mbit. I think the main problem is
> to get the nrz-code over the optical link. So I thought it would perhaps be
> possible to use two transmitters with different polarization and two
> receivers which can receive them independently. So you could get four
> different symbols.

There can only be two totally orthogonal polarizations.

I do not believe that the available LEDs have a sufficiently flat
response beyond 20MHz.  So even a 2x gain from polarization division
multiplexing is not going to be enough to reach 100mbit.

Switching to a denser and more efficient modulation would solve it
right away.  It could be done by strapping a driver onto a GNURadio
USRP, for example, but the challenge is getting the cost down to RONJA
levels.


From discover at fly.srk.fer.hr  Tue Oct 21 20:34:11 2008
From: discover at fly.srk.fer.hr (Silvije)
Date: Tue, 21 Oct 2008 21:34:11 +0200 (CEST)
Subject: [Ronja] Power is power
In-Reply-To: <96695BA5DCCC470396A4B26A319DBC2D@Martindoma>
References: <13721756.1224429580332.JavaMail.root@viefep17>
	<Pine.LNX.4.64.0810192308170.6290@fly.srk.fer.hr>
	<96695BA5DCCC470396A4B26A319DBC2D@Martindoma>
Message-ID: <Pine.LNX.4.64.0810212123270.22393@fly.srk.fer.hr>


Sorry Martin but you are wrong.
Your LED is product of Habei ltd, check your datasheet
http://www.hebeiltd.com.cn/?p=led.power

Luxeon is registered trademark for LEDs
manufactured by PhilipsLumileds and they dont have
such LEDs. Check:
http://www.philipslumileds.com/products/luxeon/

If you are interested in residential lightning with LEDs
I suggest http://www.acriche.com/en/product/prd/zpowerLED.asp

regards,
s.

ps. seems like HB ltd have 3W leds similar to original
Luxeons but I think they are at best just some cheaper chinese
knock offs ;)



On Mon, 20 Oct 2008, CD930 wrote:

> Yes Silvije and others.
> It is Luxeon LED white 360-450lm 6500-8000K 120? 700mA 10W 12-15V.
> http://www.gme.cz/_dokumentace/dokumenty/511/511-891/dsh.511-891.1.pdf
> http://www.gme.cz/cz/index.php?page=product&detail=511-891
>
>
>
> .
> Testing for normal residential lighting, but before yesterday I joined her on 
> the HF radio test modulating properties.
> Squeamish light and modulating without major distortion to 22MHz.
> There is also red, but I do not know if he would have passed through optics. 
> Case has a 6 array field.
> That my contribution please file as hyperbole but at the same time as 
> instructed on the international manufacturer of sleep and are beginning to 
> offer truly enforced LEDs.
>
> Why I bought this and other types is that I deal with 12V program for home 
> lighting.
> See:  http://picasaweb.google.com/ok1mjo/LEDOsvTlen#
>
>
> Martin
>
>
>
>
> ----- Original Message ----- From: "Silvije" <discover at fly.srk.fer.hr>
> To: "Twibright Ronja" <ronja at lists.pointless.net>
> Sent: Sunday, October 19, 2008 11:12 PM
> Subject: Re: [Ronja] Power is power
>
>
>> 
>> That is no Luxeon LED IMHO,
>> and it emitts white light, am I correct?
>> similar are those http://www.artas.hr/LED/LED.htm
>> up to 100W
>> 
>> but best white LED I have tested is ssc p7 no doubt
>> http://www.dealextreme.com/details.dx/sku.12721
>> 
>> greetz,
>> s.
>> 
>> On Sun, 19 Oct 2008, Karel Kulhavy wrote:
>> 
>>> ---- CD930 <cd930 at centrum.cz> schrieb:
>>>> Hi all.
>>>> I tested Luxeon LED 10W/730mA/450LM/120 degre.
>>> 
>>> Do they already make 10W Luxeons? Do you have a link to the datasheet?
>>> 
>>> Karel
>>> 
>>> 
>>> -- 
>>> Twibright Ronja mailing list http://ronja.twibright.com
>>> Ronja at lists.pointless.net
>>> http://pointless.net/mailman/listinfo/ronja
>>> 
>> 
>> -- 
>> Twibright Ronja mailing list http://ronja.twibright.com
>> Ronja at lists.pointless.net
>> http://pointless.net/mailman/listinfo/ronja
>> 
>> 
>

From asteri_x at freemail.hu  Tue Oct 21 20:47:22 2008
From: asteri_x at freemail.hu (=?UTF-8?B?R3l1cmvDsyBNYXJ0aW4=?=)
Date: Tue, 21 Oct 2008 21:47:22 +0200
Subject: [Ronja] What about using a polarizer?
In-Reply-To: <200810202340.39537.einer.aus.der.klasse@kilian-kiekenap.de>
References: <200810202340.39537.einer.aus.der.klasse@kilian-kiekenap.de>
Message-ID: <48FE31CA.1070905@freemail.hu>

Hi!

Actually I already thought about that a year ago and also made some 
experiments. See the archive.
The 100MBit/s are actually 125MBit/s.
The MLT3 coding on the ethernet cable makes a maximal modulating 
frequency of 31.25MHz. What is more important: 8ns Rise and fall time 
for the LED. So the transmitter could be easy, directly modulating the 
voltage of the ethernet cable onto the light.

I did not have time to create a reasonable receiver.
The only thing i was measuring the sent signal was a photodiode serially 
connected to a small ohm resistor.
Maybe it is more complicated than we think.

Also with LED and polarizer you are wasting lots of energy.
Would be more efficient to use Laser Diodes. But those are hazardous.

I actually tried LD-s. Watching the perfectly collimated red beam of a 
DVD reader pickup in a distance of 900m was very interesting. It got 
around 30cm wide, with starting beam of 0.4cm.
The light was very bright, although it was only 0.5mW of power (estimated).
BUT!. The air made it speckle a lot. Speckle interferences would destroy 
the whole transmission to a crap.
So I stopped the experiments with lasers,  and never got time for LED 
transission.

hmmm. When using polarized laser ligt, you could use 1 tube to send AND 
receive. No more aligning problems.

bye,
Martin



Kilian Kiekenap ?rta:
> Hello,
> 
> I often thought about how to make Ronja 100mbit. I think the main problem is 
> to get the nrz-code over the optical link. So I thought it would perhaps be 
> possible to use two transmitters with different polarization and two 
> receivers which can receive them independently. So you could get four 
> different symbols.
> 
> Just a thought...
> 
> Kilian
> 


From cd930 at centrum.cz  Tue Oct 21 22:10:55 2008
From: cd930 at centrum.cz (CD930)
Date: Tue, 21 Oct 2008 23:10:55 +0200
Subject: [Ronja] Power is power
References: <13721756.1224429580332.JavaMail.root@viefep17><Pine.LNX.4.64.0810192308170.6290@fly.srk.fer.hr><96695BA5DCCC470396A4B26A319DBC2D@Martindoma>
	<Pine.LNX.4.64.0810212123270.22393@fly.srk.fer.hr>
Message-ID: <9C9454265BF34A6CA48EAFA35221439E@Martindoma>

:(((
Bastards sellers...
At least soothes while listening to the Indian DRM radio station HPT AIR 
Khampur - Delhi via Himalaya DRM2009.
Hindi is just one problem, but they have wonderful music. :))
http://www.youtube.com/watch?v=4NlNGE1Q2Vk


Martin



----- Original Message ----- 
From: "Silvije" <discover na fly.srk.fer.hr>
To: "Twibright Ronja" <ronja na lists.pointless.net>
Sent: Tuesday, October 21, 2008 9:34 PM
Subject: Re: [Ronja] Power is power



Sorry Martin but you are wrong.
Your LED is product of Habei ltd, check your datasheet
http://www.hebeiltd.com.cn/?p=led.power

Luxeon is registered trademark for LEDs
manufactured by PhilipsLumileds and they dont have
such LEDs. Check:
http://www.philipslumileds.com/products/luxeon/

If you are interested in residential lightning with LEDs
I suggest http://www.acriche.com/en/product/prd/zpowerLED.asp

regards,
s.

ps. seems like HB ltd have 3W leds similar to original
Luxeons but I think they are at best just some cheaper chinese
knock offs ;)



On Mon, 20 Oct 2008, CD930 wrote:

> Yes Silvije and others.
> It is Luxeon LED white 360-450lm 6500-8000K 120? 700mA 10W 12-15V.
> http://www.gme.cz/_dokumentace/dokumenty/511/511-891/dsh.511-891.1.pdf
> http://www.gme.cz/cz/index.php?page=product&detail=511-891
>
>
>
> .
> Testing for normal residential lighting, but before yesterday I joined her 
> on
> the HF radio test modulating properties.
> Squeamish light and modulating without major distortion to 22MHz.
> There is also red, but I do not know if he would have passed through 
> optics.
> Case has a 6 array field.
> That my contribution please file as hyperbole but at the same time as
> instructed on the international manufacturer of sleep and are beginning to
> offer truly enforced LEDs.
>
> Why I bought this and other types is that I deal with 12V program for home
> lighting.
> See:  http://picasaweb.google.com/ok1mjo/LEDOsvTlen#
>
>
> Martin
>
>
>
>
> ----- Original Message ----- From: "Silvije" <discover na fly.srk.fer.hr>
> To: "Twibright Ronja" <ronja na lists.pointless.net>
> Sent: Sunday, October 19, 2008 11:12 PM
> Subject: Re: [Ronja] Power is power
>
>
>>
>> That is no Luxeon LED IMHO,
>> and it emitts white light, am I correct?
>> similar are those http://www.artas.hr/LED/LED.htm
>> up to 100W
>>
>> but best white LED I have tested is ssc p7 no doubt
>> http://www.dealextreme.com/details.dx/sku.12721
>>
>> greetz,
>> s.
>>
>> On Sun, 19 Oct 2008, Karel Kulhavy wrote:
>>
>>> ---- CD930 <cd930 na centrum.cz> schrieb:
>>>> Hi all.
>>>> I tested Luxeon LED 10W/730mA/450LM/120 degre.
>>>
>>> Do they already make 10W Luxeons? Do you have a link to the datasheet?
>>>
>>> Karel
>>>
>>>
>>> -- 
>>> Twibright Ronja mailing list http://ronja.twibright.com
>>> Ronja na lists.pointless.net
>>> http://pointless.net/mailman/listinfo/ronja
>>>
>>
>> -- 
>> Twibright Ronja mailing list http://ronja.twibright.com
>> Ronja na lists.pointless.net
>> http://pointless.net/mailman/listinfo/ronja
>>
>>
>


--------------------------------------------------------------------------------


> -- 
> Twibright Ronja mailing list http://ronja.twibright.com
> Ronja na lists.pointless.net
> http://pointless.net/mailman/listinfo/ronja
> 



From twibright at hispeed.ch  Wed Oct 22 09:06:04 2008
From: twibright at hispeed.ch (Karel Kulhavy)
Date: Wed, 22 Oct 2008 10:06:04 +0200
Subject: [Ronja] Bodily adaptation to soldering and desoldering
Message-ID: <26201039.1224662764894.JavaMail.root@viefep11.chello.at>

After going to a gym for few years I have noticed I can hold a sheet of paper between my chest muscles. I got an idea to use it for desoldering: hold a PCB between the pecs,
solder sucker in one hand and soldering gun in the other. The vertical position of the
board is the best for desoldering.

For soldering, people with a large belly could try something similar. Insert the board into an abdominal fat fold and bend forward, clamping the board firmly.  Then hold the soldering iron with one hand and the solder in the other. Here a horizontal position of the board is optimal.

A body of an organism evolves to suit a task that is often done ;-)

Karel



From hybrid.parameter at yahoo.com  Wed Oct 22 19:15:25 2008
From: hybrid.parameter at yahoo.com (Saad Shakeel)
Date: Wed, 22 Oct 2008 11:15:25 -0700 (PDT)
Subject: [Ronja] Bodily adaptation to soldering and desoldering
In-Reply-To: <26201039.1224662764894.JavaMail.root@viefep11.chello.at>
Message-ID: <262444.65424.qm@web44901.mail.sp1.yahoo.com>

I've lots of other ideas.... which, if i share.. i'd probably get kicked out of here... : D

--- On Wed, 10/22/08, Karel Kulhavy <twibright at hispeed.ch> wrote:

From: Karel Kulhavy <twibright at hispeed.ch>
Subject: [Ronja] Bodily adaptation to soldering and desoldering
To: "Twibright Ronja" <ronja at lists.pointless.net>
Date: Wednesday, October 22, 2008, 1:06 AM

After going to a gym for few years I have noticed I can hold a sheet of paper
between my chest muscles. I got an idea to use it for desoldering: hold a PCB
between the pecs,
solder sucker in one hand and soldering gun in the other. The vertical position
of the
board is the best for desoldering.

For soldering, people with a large belly could try something similar. Insert
the board into an abdominal fat fold and bend forward, clamping the board
firmly.  Then hold the soldering iron with one hand and the solder in the other.
Here a horizontal position of the board is optimal.

A body of an organism evolves to suit a task that is often done ;-)

Karel


-- 
Twibright Ronja mailing list http://ronja.twibright.com
Ronja at lists.pointless.net
http://pointless.net/mailman/listinfo/ronja



      
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From asteri_x at freemail.hu  Fri Oct 24 20:23:11 2008
From: asteri_x at freemail.hu (=?UTF-8?B?R3l1cmvDsyBNYXJ0aW4=?=)
Date: Fri, 24 Oct 2008 21:23:11 +0200
Subject: [Ronja] Bodily adaptation to soldering and desoldering
In-Reply-To: <262444.65424.qm@web44901.mail.sp1.yahoo.com>
References: <262444.65424.qm@web44901.mail.sp1.yahoo.com>
Message-ID: <4902209F.3020209@freemail.hu>

you guys are sick!
And what if the solder flows onto the skin?
That for sure hurts. especially the not so well heat-trained skin parts. :D

Gyurma

Saad Shakeel ?rta:
> I've lots of other ideas.... which, if i share.. i'd probably get kicked 
> out of here... : D
> 
> --- On *Wed, 10/22/08, Karel Kulhavy /<twibright at hispeed.ch>/* wrote:
> 
>     From: Karel Kulhavy <twibright at hispeed.ch>
>     Subject: [Ronja] Bodily adaptation to soldering and desoldering
>     To: "Twibright Ronja" <ronja at lists.pointless.net>
>     Date: Wednesday, October 22, 2008, 1:06 AM
> 
>     After going to a gym for few years I have noticed I can hold a sheet of paper
>     between my chest muscles. I got an idea to use it for desoldering: hold a PCB
>     between the pecs,
>     solder sucker in one hand and soldering gun in the other. The vertical position
>     of the
>     board is the best for desoldering.
> 
>     For soldering, people with a large belly could try something similar. Insert
>     the board into an abdominal fat fold and bend forward, clamping the board
>     firmly.  Then hold the soldering iron with one hand and the solder in the other.
>     Here a horizontal position of the board is optimal.
> 
>     A body of an organism evolves to suit a task that is often done ;-)
> 
>     Karel
> 
> 
>     -- 
>     Twibright Ronja mailing list http://ronja.twibright.com
>     Ronja at lists.pointless.net
>     http://pointless.net/mailman/listinfo/ronja
> 
> 


From pedro.lopezestepa at epfl.ch  Sun Oct 26 09:43:35 2008
From: pedro.lopezestepa at epfl.ch (pedro.lopezestepa at epfl.ch)
Date: Sun, 26 Oct 2008 10:43:35 +0100
Subject: [Ronja] Ronja Low Distance
In-Reply-To: <12978014.1224512584887.JavaMail.root@viefep11.chello.at>
References: <12978014.1224512584887.JavaMail.root@viefep11.chello.at>
Message-ID: <20081026104335.lxpjffxo4ogo080o@webmail.epfl.ch>

Hello,

I want to do it for 2 meter and with a MIC for do the modulation, its  
posible use ronja desing for the LED's drive?

Best,


Karel Kulhavy <twibright at hispeed.ch> ha escrito:

> ---- pedro.lopezestepa at epfl.ch schrieb:
>> Hello,
>>
>> I have a question to do Ronja in low distance without lents. Do you
>> know if its posible to scale?
>
> Without lens Ronja goes only about 2 meters, see the Ronja testing   
> procedure http://ronja.twibright.com/testing/ned_tetrapolis.php
>
> With scale do you think improve this distance without lens? One   
> could use multiple transmitters or a photodiode with a greater area.
> The architecture of the Ronja receiver allows arbitrarily high   
> photodiode capacitance.
>
> Karel
>
>




From pkyaduvanshi at gmail.com  Mon Oct 27 05:07:48 2008
From: pkyaduvanshi at gmail.com (PRAMOD YADUVANSHI)
Date: Mon, 27 Oct 2008 10:37:48 +0530
Subject: [Ronja] Ronja Low Distance
In-Reply-To: <20081026104335.lxpjffxo4ogo080o@webmail.epfl.ch>
References: <12978014.1224512584887.JavaMail.root@viefep11.chello.at>
	<20081026104335.lxpjffxo4ogo080o@webmail.epfl.ch>
Message-ID: <50d3ad760810262207p3cca98baw5618dbb9294776af@mail.gmail.com>

You can use one single IC for driving and replace High power LED with normal
RED Led

2008/10/26 <pedro.lopezestepa at epfl.ch>

> Hello,
>
> I want to do it for 2 meter and with a MIC for do the modulation, its
> posible use ronja desing for the LED's drive?
>
> Best,
>
>
> Karel Kulhavy <twibright at hispeed.ch> ha escrito:
>
> > ---- pedro.lopezestepa at epfl.ch schrieb:
> >> Hello,
> >>
> >> I have a question to do Ronja in low distance without lents. Do you
> >> know if its posible to scale?
> >
> > Without lens Ronja goes only about 2 meters, see the Ronja testing
> > procedure http://ronja.twibright.com/testing/ned_tetrapolis.php
> >
> > With scale do you think improve this distance without lens? One
> > could use multiple transmitters or a photodiode with a greater area.
> > The architecture of the Ronja receiver allows arbitrarily high
> > photodiode capacitance.
> >
> > Karel
> >
> >
>
>
>
> --
> Twibright Ronja mailing list http://ronja.twibright.com
> Ronja at lists.pointless.net
> http://pointless.net/mailman/listinfo/ronja
>
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From twibright at hispeed.ch  Mon Oct 27 11:03:44 2008
From: twibright at hispeed.ch (Karel Kulhavy)
Date: Mon, 27 Oct 2008 12:03:44 +0100
Subject: [Ronja] Increasing the RX sensitivity and range
Message-ID: <18300587.1225105424403.JavaMail.root@viefep11.chello.at>

I have developed a new method to calculate noise. Noise is not expressed in amperes or volts per square root of Hertz (which is difficult to calculate with and to imagine),
but as a DC current which causes shot noise.

Then it's very simple:
diode with current I flowing -> I (including photodiode)
transistor base -> Ib
transistor collector -> Ic
resistor: 52mV/R
MOSFET drain: 34mV * gs (forward transfer admittance or transconductance)
amplifier with gain A -> increases or decrases by A^2

Then the 100k resistor in Ronja input makes 500nA and the MOSFET only 274nA. The
dark current makes 5nA.

If we connect the diode to 48V, we reduce the total input
capacitance from 5pF to 3.8pF which increases the signal by 30%. We can icnrease the
feed resistor to 390 kOhm which reduces the resistor noise to 130nA!

If you are bored, please try connecting the diode to 48V through a 390 kOhm instead of 12V through 100kOhm and tell if the distance during low ambient light increases. Don't forget copious filtering and shielding for the 48V. The input is extremely sensitive!

This should increase the range during low light conditions (fog during the night).

I will recalculate this all anyway because I am attempting to build a new better Ronja
RX. I am just curious if someone wants to try it earlier than me! :)

Karel


From twibright at hispeed.ch  Mon Oct 27 11:18:19 2008
From: twibright at hispeed.ch (Karel Kulhavy)
Date: Mon, 27 Oct 2008 12:18:19 +0100
Subject: [Ronja] Ronja Low Distance
Message-ID: <13088794.1225106299368.JavaMail.root@viefep11.chello.at>

---- pedro.lopezestepa at epfl.ch schrieb:
> Hello,
> 
> I want to do it for 2 meter and with a MIC for do the modulation, its  
> posible use ronja desing for the LED's drive?

With MIC do you mean microphone or microwave integrated circuit?
I don't understand the question the Ronja design is used for the
LED's drive so obviously it is possible.

Karel



From pedro.lopezestepa at epfl.ch  Tue Oct 28 09:42:21 2008
From: pedro.lopezestepa at epfl.ch (pedro.lopezestepa at epfl.ch)
Date: Tue, 28 Oct 2008 10:42:21 +0100
Subject: [Ronja] Ronja Low Distance
In-Reply-To: <13088794.1225106299368.JavaMail.root@viefep11.chello.at>
References: <13088794.1225106299368.JavaMail.root@viefep11.chello.at>
Message-ID: <20081028104221.tep5cwdw8owko0so@webmail.epfl.ch>

Hello,

MIC is Microcontroler/DSP, I want to use it, underwater in a low  
distance transmision. I dont understand why they use BPSK with analog  
output and they give the signal to a LED, They do a AD convert before  
the LED?
And the other question is what type of drive use them for the LED.
Thanks
Pedro

Karel Kulhavy <twibright at hispeed.ch> a ?crit?:

> ---- pedro.lopezestepa at epfl.ch schrieb:
>> Hello,
>>
>> I want to do it for 2 meter and with a MIC for do the modulation, its
>> posible use ronja desing for the LED's drive?
>
> With MIC do you mean microphone or microwave integrated circuit?
> I don't understand the question the Ronja design is used for the
> LED's drive so obviously it is possible.
>
> Karel
>
>




From twibright at hispeed.ch  Tue Oct 28 11:07:15 2008
From: twibright at hispeed.ch (Karel Kulhavy)
Date: Tue, 28 Oct 2008 12:07:15 +0100
Subject: [Ronja] Ronja Low Distance
Message-ID: <1200955.1225192036489.JavaMail.root@viefep11.chello.at>

---- pedro.lopezestepa at epfl.ch schrieb:
> Hello,

> MIC is Microcontroler/DSP, I want to use it, underwater in a low  
> distance transmision. I dont understand why they use BPSK with analog

The BPSK is the modulation used in Ethernet. But it's not a BPSK with sine
wave, but with square wave.
  
> output and they give the signal to a LED, They do a AD convert before  
> the LED?

Yes the transmitter gets the signal from a cable and converts it to digital
levels before the LED.

> And the other question is what type of drive use them for the LED.

The type of drive is obvious from the TX schematic. It's a bunch of 74HC gates wired in
parallel, feeding the LED over a resistor. The Nebulus TX has a different drive
mechanism.

Karel

Thanks
Pedro

Karel Kulhavy <twibright at hispeed.ch> a ?crit :

> ---- pedro.lopezestepa at epfl.ch schrieb:
>> Hello,
>>
>> I want to do it for 2 meter and with a MIC for do the modulation, its
>> posible use ronja desing for the LED's drive?
>
> With MIC do you mean microphone or microwave integrated circuit?
> I don't understand the question the Ronja design is used for the
> LED's drive so obviously it is possible.
>
> Karel
>
>



-- 
Twibright Ronja mailing list http://ronja.twibright.com
Ronja at lists.pointless.net
http://pointless.net/mailman/listinfo/ronja




From sr6220305 at yahoo.com  Thu Oct 30 23:22:55 2008
From: sr6220305 at yahoo.com (Sean Ramdeholl)
Date: Thu, 30 Oct 2008 16:22:55 -0700 (PDT)
Subject: [Ronja] Bodily adaptation to soldering and desoldering
In-Reply-To: <4902209F.3020209@freemail.hu>
Message-ID: <687250.30616.qm@web55507.mail.re4.yahoo.com>

... And what if the solder flows onto the skin?

Great way to burn some fat!


--- On Fri, 10/24/08, Gyurk? Martin <asteri_x at freemail.hu> wrote:
From: Gyurk? Martin <asteri_x at freemail.hu>
Subject: Re: [Ronja] Bodily adaptation to soldering and desoldering
To: hybrid.parameter at yahoo.com, "Twibright Ronja" <ronja at lists.pointless.net>
Date: Friday, October 24, 2008, 4:23 PM

you guys are sick!
And what if the solder flows onto the skin?
That for sure hurts. especially the not so well heat-trained skin parts. :D

Gyurma

Saad Shakeel ?rta:
> I've lots of other ideas.... which, if i share.. i'd probably get
kicked 
> out of here... : D
> 
> --- On *Wed, 10/22/08, Karel Kulhavy /<twibright at hispeed.ch>/*
wrote:
> 
>     From: Karel Kulhavy <twibright at hispeed.ch>
>     Subject: [Ronja] Bodily adaptation to soldering and desoldering
>     To: "Twibright Ronja" <ronja at lists.pointless.net>
>     Date: Wednesday, October 22, 2008, 1:06 AM
> 
>     After going to a gym for few years I have noticed I can hold a sheet
of paper
>     between my chest muscles. I got an idea to use it for desoldering:
hold a PCB
>     between the pecs,
>     solder sucker in one hand and soldering gun in the other. The vertical
position
>     of the
>     board is the best for desoldering.
> 
>     For soldering, people with a large belly could try something similar.
Insert
>     the board into an abdominal fat fold and bend forward, clamping the
board
>     firmly.  Then hold the soldering iron with one hand and the solder in
the other.
>     Here a horizontal position of the board is optimal.
> 
>     A body of an organism evolves to suit a task that is often done ;-)
> 
>     Karel
> 
> 
>     -- 
>     Twibright Ronja mailing list http://ronja.twibright.com
>     Ronja at lists.pointless.net
>     http://pointless.net/mailman/listinfo/ronja
> 
> 

-- 
Twibright Ronja mailing list http://ronja.twibright.com
Ronja at lists.pointless.net
http://pointless.net/mailman/listinfo/ronja



      
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