From twibright at hispeed.ch  Fri Dec  4 13:12:51 2009
From: twibright at hispeed.ch (Karel Kulhavy)
Date: Fri, 4 Dec 2009 14:12:51 +0100
Subject: [Ronja] Experimelntal Ronja Tetrapolis link
Message-ID: <2039639.1259932371561.JavaMail.root@viefep17>

---- "Jakub Rogu?" <jakub.rogus at gmail.com> schrieb:
> Hi,
> I want to get a very short experimental Ronja link (aboute 1m) in one
> room without lens.
> Do I need to calculate and add resistor and capacitor in RX like this
> http://ronja.twibright.com/faq/short.php or not??
For 1 m without lenses you don't have to

Regards,

Karel
> 
> Thanks for a help.
> 
> Regards,
> Jakub
> 
> _______________________________________________
> Ronja mailing list
> Ronja at lists.pointless.net
> http://pointless.net/mailman/listinfo/ronja



From alchalaby2004 at yahoo.com  Sat Dec  5 16:05:36 2009
From: alchalaby2004 at yahoo.com (alchalaby 2004)
Date: Sat, 5 Dec 2009 08:05:36 -0800 (PST)
Subject: [Ronja] (no subject)
Message-ID: <697947.56668.qm@web50507.mail.re2.yahoo.com>

dear sir 
on the
http://www.electronics-lab.com/projects/pc/023/index.html
I found your "RJ45 Network card to IR communication".
one problem i faced is the crystal osilator not avilabel in the market. Can I use 2 MHz?or 3 MHz crystal oscilltors. 
??

Best regards
Eng. Ahmed Abd Al-Kareem Ali Al-Chalaby
Laser & Optoelectronics Engineer
?Mobile: 00964-7707105820
?E-Mail: alchalaby2004 at yahoo.com 
?


      
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From cpuon at fsomexico.com  Wed Dec  9 03:25:15 2009
From: cpuon at fsomexico.com (Cecilia Puon)
Date: Tue, 08 Dec 2009 21:25:15 -0600
Subject: [Ronja] How distinguish packets at U63 in Twister?
Message-ID: <1260329115.3513.67.camel@usuario>

Hello, everybody, I still dont understand how can i send data if the
packets produce zero on U63-10, in agreement with "How does ronja
work?". How can I distinguish the data at the end of U63?

I re-write the part in which Ronja people describes the function of the
pulse extenders, in this part they describe how packets generate zero at
the end of U63.

"U54 is just a buffer. C66 and R52 replace leading edges in the signal
with short H impulses and everything else with L. U52 inverts it and on
every leading edge of the original signal, U63 gets reset to zeroes on
all outputs. On every tick of the 16MHz clock (62.5 ns) one tap gets set
to one. That means if the output is on the 5th tap, it gets set from

0 back to 1 after 4-5 ticks, that means after 250-312.5 ns it gets back to H.

If the incoming signal has the leading edge pitch less than 250ns, then the output stays
permanently in 0. If it has more, then it will contain ones interspersed with zeroes.

The Manchester signal has maximum leading edge pitch of 200ns(5Mhz). The silence between
the packets takes at least 9600ns. So packets will produce zero on U63-10 and the interframe gaps one."

Thank you for your help.

Cecilia Pu?n. 






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From twibright at hispeed.ch  Fri Dec 11 15:34:34 2009
From: twibright at hispeed.ch (Karel Kulhavy)
Date: Fri, 11 Dec 2009 16:34:34 +0100
Subject: [Ronja] How distinguish packets at U63 in Twister?
Message-ID: <31635004.1260545675697.JavaMail.root@viefep14>

The data are going through a different path.

Karel
---- Cecilia Puon <cpuon at fsomexico.com> schrieb:
> Hello, everybody, I still dont understand how can i send data if the
> packets produce zero on U63-10, in agreement with "How does ronja
> work?". How can I distinguish the data at the end of U63?
> 
> I re-write the part in which Ronja people describes the function of the
> pulse extenders, in this part they describe how packets generate zero at
> the end of U63.
> 
> "U54 is just a buffer. C66 and R52 replace leading edges in the signal
> with short H impulses and everything else with L. U52 inverts it and on
> every leading edge of the original signal, U63 gets reset to zeroes on
> all outputs. On every tick of the 16MHz clock (62.5 ns) one tap gets set
> to one. That means if the output is on the 5th tap, it gets set from
> 
> 0 back to 1 after 4-5 ticks, that means after 250-312.5 ns it gets back to H.
> 
> If the incoming signal has the leading edge pitch less than 250ns, then the output stays
> permanently in 0. If it has more, then it will contain ones interspersed with zeroes.
> 
> The Manchester signal has maximum leading edge pitch of 200ns(5Mhz). The silence between
> the packets takes at least 9600ns. So packets will produce zero on U63-10 and the interframe gaps one."
> 
> Thank you for your help.
> 
> Cecilia Pu?n. 
> 
> 
> 
> 
> 
> 



From twibright at hispeed.ch  Wed Dec 16 09:52:48 2009
From: twibright at hispeed.ch (Karel Kulhavy)
Date: Wed, 16 Dec 2009 10:52:48 +0100
Subject: [Ronja] (no subject)
Message-ID: <18070964.1260957169560.JavaMail.root@viefep13>

Hello,

---- alchalaby 2004 <alchalaby2004 at yahoo.com> schrieb:
> dear sir 
> on the
> http://www.electronics-lab.com/projects/pc/023/index.html

Unfortunately nothing shows on that page for me (tried 2 different
web browsers)

Karel

> I found your "RJ45 Network card to IR communication".
> one problem i faced is the crystal osilator not avilabel in the market. Can I use 2 MHz or 3 MHz crystal oscilltors. 
>   
> 
> Best regards
> Eng. Ahmed Abd Al-Kareem Ali Al-Chalaby
> Laser & Optoelectronics Engineer
>  Mobile: 00964-7707105820
>  E-Mail: alchalaby2004 at yahoo.com 
>  






From twibright at hispeed.ch  Wed Dec 16 10:17:23 2009
From: twibright at hispeed.ch (Karel Kulhavy)
Date: Wed, 16 Dec 2009 11:17:23 +0100
Subject: [Ronja] Someone already did this? Opinion from Karel is welcome
 too!
Message-ID: <494990.1260958644362.JavaMail.root@viefep13>

---- Russell Valentine <russ at coldstonelabs.org> schrieb:
> Leandro Alan wrote:
> > Backbone:
> > Multiples Ronja doing a backbone link (star or mesh topology). To increase bandwidth I think is possible to add one or more Ronja to the same link.
> 
> So these spots were you have multiple Ronja to get increase bandwidth, 
> you would have some router to direct data through the two different 
> Ronja? Or just half the users through one, half through the other?

You can use both. Link aggregation or connect the networks separately.
There has to be some distance between the links. How much hard to say because it will tolerate some crosstalk.

Karel
> 
> Using multiple Ronja along the same line might be hard. If they are 
> pointed at the same direction the TX beam divergence would cause 
> interference with the other one I would think. They would need to be 
> apart (up to around 3 meters if you can achieve 2mrad divergence) or 
> something cleaver needs to be done (polarization filters?).
> 
> _______________________________________________
> Ronja mailing list
> Ronja at lists.pointless.net
> http://pointless.net/mailman/listinfo/ronja



From twibright at hispeed.ch  Wed Dec 16 10:24:56 2009
From: twibright at hispeed.ch (Karel Kulhavy)
Date: Wed, 16 Dec 2009 11:24:56 +0100
Subject: [Ronja] ronja light
Message-ID: <20888949.1260959097024.JavaMail.root@viefep13>

---- Bob Zeilstra <bob.zeilstra at gmail.com> schrieb:
> Have you ever considered using a small satellite dish with a mirrored
> surface as your housing? They are discarded as garbage around here.

Yes I have and I think the precision is not good enough.

Karel
> 
> Like this:
> http://www.youtube.com/watch?v=3ldwWIPAwqk
> 
> Good luck,
> Bob



From twibright at hispeed.ch  Thu Dec 17 09:29:43 2009
From: twibright at hispeed.ch (Karel Kulhavy)
Date: Thu, 17 Dec 2009 10:29:43 +0100
Subject: [Ronja] L51 of Twister1?
Message-ID: <6848007.1261042184697.JavaMail.root@viefep17>

Hi Cecilia,

---- Cecilia Puon <cpuon at fsomexico.com> schrieb:
> 
> I am taking this schematic and part list
> http://ronja.twibright.com:8080/twister/building.php as my reference. I
> do not know if the coil is the same for TX v. 20050111, which has a coil
> with 10 turns with 8mm of diameter and length of 32mm, with these
> measures the inductor is 150uH. Also, I bought a Twister1 rev. 20040807

150uH is definitely too much. I don't know if it will cause any problem or not. The coil in Twister has approx. 1uH inductance.

Karel

> that has a Ferrite Inductor and it colors are Brown, Green, Gold and
> Silver, so the value is 1.5 uH. 
> I am building my own Twister but I do not know which is the real value
> of the inductor that I need for Twister 1. rev. 20040807.
> 
> Thak you, Cecilia Puon
> 
> 
> El s?b, 10-10-2009 a las 14:41 -0500, Cecilia Puon escribi?:
> 
> > Hello. Can anyone help to know which is the equivalent in Henrys of
> > L51 at Twister1? I will appreciate the answer very much.
> > 
> > Thank you. Cecilia Pu?n 
> > 
> > _______________________________________________
> > Ronja mailing list
> > Ronja at lists.pointless.net
> > http://pointless.net/mailman/listinfo/ronja



From twibright at hispeed.ch  Thu Dec 17 09:39:09 2009
From: twibright at hispeed.ch (Karel Kulhavy)
Date: Thu, 17 Dec 2009 10:39:09 +0100
Subject: [Ronja] Problems with testing my 1st Ronja Twister
Message-ID: <17148839.1261042749394.JavaMail.root@viefep17>

Hi Jakub,

Sorry for the late reply...

---- "Jakub Rogu?" <jakub.rogus at gmail.com> schrieb:
> Hi,
> 
> I need a help with testing Twister (BER test using bertest).
> 
> My steps:
> I'm download and tar Bertest pack. --> I'm done make in a Bertest
> directory.
> I setup my NIC @ 10baset-FD and plug network cable into PC and Twister
> (Twister TX and RX are in short-circuit)
> Power On - yellow LED is shining - OK
> Now I run ./pktloss
> 
> On the screen I have output like this:
> 1255348368.595961822	0	0	1024	2224
> 1255348369.231904233	0	0	1024	2224
> 1255348369.873941980	0	0	1024	2224
> 1255348370.515447052	0	0	1024	2224
> 1255348371.158821559	0	0	1024	2224
> 1255348371.791861785	0	0	1024	2224
> 
> 2nd and 3rd column is "0" ... is it correct? (I think yes - because is not
> packet loss)

Yes that means the Twister works OK.

> Now I want to start ./bertest but I don't know what arguments must be used
> "bertest <arguments> > rx_1.dat" @
> http://ronja.twibright.com/testing/ber_twister_bertest.php
> When I start ./bertest > whatever.dat the TX and RX LEDs shin for a short
> time - 0,5s - whatever.dat is empty)

I think the instructions are wrong. The part with bertest until end should be deleted. Because for Twister it doesn't make sense to
measure the exact packetloss since it's always 0. It makes sense to
measure a Ronja where there is actually some noise on the line.

Karel

> 
> :(
> 
> Thanks for help!
> 
> _______________________________________________
> Ronja mailing list
> Ronja at lists.pointless.net
> http://pointless.net/mailman/listinfo/ronja



From twibright at hispeed.ch  Thu Dec 17 09:43:24 2009
From: twibright at hispeed.ch (Karel Kulhavy)
Date: Thu, 17 Dec 2009 10:43:24 +0100
Subject: [Ronja] SMD ronja RX
Message-ID: <27800233.1261043005103.JavaMail.root@viefep17>

Hi Mark,

---- Mark Robinson <mark.robinson at paradise.net.nz> schrieb:
> Cecilia Puon wrote:
>   Also the R122 is 2.2Mohms?
> 
> Thank you for your fast answer.
> 
> Cecilia Pu?n

> Now that's scary, the schematic diagram I pulled down from

>     http://ronja.twibright.com/schematics/rx_experimental_00.pdf

This is some experimental unfinished schematic. A user doesn't have
to bother with this oen at all.

Karel

> shows many resistors with the same designation (Rnnn). There's a > trap.

> If the resistor you are looking at has it's value specified as 2M2 > then yes, 
> 2.2 meg-ohms.

> El mar, 29-09-2009 a las 14:57 +1300, Mark Robinson escribi?:
>> Cecilia Puon wrote:
>> >   Hello, I hope some of you can help me . I am buying the components for 
>> > arming the SMD Ronja Receiver but I am confused with 1 of the parts:
>>
>> R103
>>
>> 2M2 = 2.2MOhm
>>      = 2.2 mega-ohms
>>      = 2200000 ohms
>>
>> > I do not know exactly which is the value of the resistor.
>>
>> C110
>>
>> 270 = 270pF
>>      = 270 picofarad
>>      = 0.27 nanofarad
>>      = 0.00027 microfarad
>>      = 0.000000000270 Farad
>>
>> > Also I dont know the value of this capacitor.
>> > 
>> > If you can guide me with the value of this components I would appreciate 
>> > it very much.
>> > 
>> > Thank you for your support.



_______________________________________________
Ronja mailing list
Ronja at lists.pointless.net
http://pointless.net/mailman/listinfo/ronja




From twibright at hispeed.ch  Thu Dec 17 09:51:41 2009
From: twibright at hispeed.ch (Karel Kulhavy)
Date: Thu, 17 Dec 2009 10:51:41 +0100
Subject: [Ronja] Crystal Oscillator in Hertz
Message-ID: <23253933.1261043502104.JavaMail.root@viefep17>

---- "A. B." <bio5 at hotmail.com> schrieb:
> 
> Hi,
> 
> I am trying to build the Hertz, yet I found something inconvenient, the Oscillator in the list is a Crystal one which as far as I know comes in two pin package only with no pin specified 

Two pin package is just the crystal - passive part without electronics.
Four pin package is crystal oscillator - contains the passive part and electronics.

You need the four pin one. If it's difficult to get you could get
some from some old 10Mbps network card.

for Vcc or Ground, yet according to the schematics the oscillator got at least 4 pins with two used, pin 4 as Vcc and 3 as output
> 
> so I would like to know if the ordinary crystal oscillator works or shall I look for a chip oscillator? and if I have to look for chip package what is the one I should use?

The package doesn't matter can be even SMD if it's not difficult
for you to solder.

Karel
> 
>  
> 
> _________________________________________________________________
> More than messages?check out the rest of the Windows Live?.
> http://www.microsoft.com/windows/windowslive/



From twibright at hispeed.ch  Thu Dec 17 12:35:06 2009
From: twibright at hispeed.ch (Karel Kulhavy)
Date: Thu, 17 Dec 2009 13:35:06 +0100
Subject: [Ronja] Twibright Labs now also on Facebook
Message-ID: <10808914.1261053306638.JavaMail.root@viefep17>

Hello

I made a Twibright Labs group on Facebook which is related to Ronja, Links and other products of Twibright Labs. There are 7 members now.

So who is interested feel free to subscribe :)

Cheers,

Karel


From twibright at hispeed.ch  Thu Dec 17 14:25:41 2009
From: twibright at hispeed.ch (Karel Kulhavy)
Date: Thu, 17 Dec 2009 15:25:41 +0100
Subject: [Ronja] SFH 203 SPICE model
Message-ID: <5097251.1261059941638.JavaMail.root@viefep17>

---- Daniel Nevistic <dnevistic at yahoo.com> schrieb:
> Karel---
> 
> I noticed in your comments in the .LIB that you conjectured that the capacitance of the body would change as the length of the leads varied.  
> 
> I would think that this is negligible and that the increase in inductance introduced by the leads was much more significant.

Depends on the circuit you use it in. One circuit can be sensitive
to capacity, another to inductance. Ronja is not sensitive to
inductance and knowing the capacity is of interest there.

Kalrel


> 
> What do you think?
> 
> Daniel T. Nevistic
> U.S.A.
> 
> --- On Mon, 4/13/09, Karel Kulhavy <twibright at hispeed.ch> wrote:
> 
> From: Karel Kulhavy <twibright at hispeed.ch>
> Subject: [Ronja] SFH 203 SPICE model
> To: ronja at lists.pointless.net
> Date: Monday, April 13, 2009, 7:35 AM
> 
> Hello
> 
> I have created SFH203 SPICE model from measurements:
> http://ronja.twibright.com/sim/models/sfh203.lib
> 
> Karel
> 
> _______________________________________________
> Ronja mailing list
> Ronja at lists.pointless.net
> http://pointless.net/mailman/listinfo/ronja
>