[Ronja] A few questions

Karel Kulhavy clock at twibright.com
Wed Oct 31 08:50:53 GMT 2007


On Tue, Oct 30, 2007 at 08:57:41PM +0000, Alec Wright wrote:
> On Tue, 2007-10-30 at 20:53 +0100, Karel Kulhavy wrote:
> > You should have a PCB for Twister or Twister2. Transmitter and RX aren't
> > so critical.
> >
> > If it's wired logically correctly (I didn't check) then yes - what's happening
> > there with the 133's and the following 32 and 00 is that 17 wires are AND-ed
> > together. You can use a different method to achieve the same logical result.
> > Just if some wires encounter longer propagation path in your replacement
> > circuit, hook them to the 4040 outputs that are lower on the schematic. Since
> > if the number in these counters increments, the bits flip consecutively from
> > top to bottom and the whole logic is designed with this assumption. If
> > this is not met, it could produce glitches - or at least require some
> > thinking to prove that it won't glitch.
> Thanks :)
> > >  
> > > 3. Could I increase the range by adding more ultra bright LEDs and using
> > > different lenses? I'm hoping for about a 4km range (!!)
> > 
> > No - only one LED can be in the focus of a lens.
> How about a single ultra bright one?
> http://www.rapidonline.com/productinfo.aspx?tier1=Electronic
> +Components&tier2=Optoelectronics&tier3=Power+LEDs&tier4=3W+Power
> +LED&moduleno=74700#techspec

No the current Ronja design is not suitable for this type of LED.

CL<

> The above is 75 lumen, which is colossal compared to the 3.8 lumen one
> which is recommended in the guide. This will probably violate eye safety
> laws, but oh well :)
> I might even be able to get a neon light in.
> And I know I'll need to put a few more transistors in it to power the
> 0.7A LED too.
> 
> 
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