thankz guys - u gave me a lotta good ideas. i've half breadboarded a test cct -
will use the PIC to drive a 4N25 opto coupler so it has to be active low to
fire. Tristate will simply be "off". Using a TIP4? to fire the current thru a
resistor (not a LED!) at this stage :) Don't have a MOSFET on hand but this
will serve to test things out. there's a 2200uF cap that will supply current. I
find i have a clapped out old 12V gel battery that loses its charge real quick
so that will help test what happens as voltage declines. Will let u know how it
goes - this avo hopefully?
Best - Debbie :)

 --- Wouter van Ooijen <wouter@VOTI.NL> wrote: > > What should I be on the look
out for & ways to
> > guard against?
>
> How about getting the peak current from a capacitor - might be a good
> idea anyway - and guarding the current from the battery to the
> capacitor? Maybe use a polyfuse.
>
> Wouter van Ooijen


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