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--This doesn't explain why your circuits always work the first time but not
--subsequent times. Are you 100% certain of this? As far as stored charge
--goes, the diode in series with the pic pin should avert problems there.

I just talked to the main performer and they said this happens sometimes
even when the circuit is turned on for the _first_ time.

--What sort of reset circuit do you have on the PIC's /MCLR pin? It sounds
--possible that your circuits do not get a reliable startup reset.

I'm pretty sure that I used a pull-up resistor to tie /MCLR to 5V.



I'm only lighting one LED at a time ...but it's possible that while one is
being lit, a few other capacitors are discharging for the fading
effect.   It's possible that when the circuit is switched off (we're just
using a simple slide swicth) a few of the capacitors still have charge in them.


I'm just using a 9V battery for the power.

I don't have any other capacitors in the circuit (i.e. no decoupling caps
for the 7805 or my pic)


I'm really puzzled.


James Tu
james@2-bit-toys.com

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