RussellMc <apptechnz <at> gmail.com> writes:

=20
>I am assuming that the tuner runs the LEDs continuously at the tuning
>frequency while it is in use. If that is the case then there is no sense i=
n
>using a really large cap. You only need one to hold enough charge for one
>pulse of the LED. You certainly aren't likely to have one big enough to ho=
ld
>a charge through a whole tuning cycle, which I am guessing will be at leas=
t
>several seconds.
=20
>You need about 1000 uF provides ~~ 1V of voltage "droop" per mA per second=
..

Maybe it's easier to provide more stable supply to the PIC, e.g. use RC fil=
ter
on power going to PIC. in this case one needs to satisfy a smaller current=
=20
to PIC. =20

Sergey Dryga
http://beaglerobotics.com





--=20
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