On Thu, Jun 9, 2011 at 9:39 PM, Sergey Dryga <sergey@dryga.us> wrote:

>  1. Transistors to drive LED: it's easier to tie LED to Vcc and use BJT a=
s
> low
> side switch;
>

Yep - that's what I was thinking.


> 2. Capacitors: recommend a larger caps (in addition to decoupling 0.1uF
> that you
> already have) to handle high LED current and prevent large volt drop on t=
he
> battery.  It might be a non-issue with fresh cells, but as they are used
> up, the
> internal resistance will increase.
>

Yes sir. What size capacitor do you recommend?
--=20
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