> camera controller mudule

Is it a module when it goes up, and a mudule when it lands in
a puddle ?

> http://www.angelfire.com/mech/homerov/rocket/schem.jpg

GP4 can be set as a low output, pull GP3 high with a resistor (eg
10k and disable interrupt-on-change, perhaps add a 10n cap to
ground if used as /MCLR). GP1, GP2 need pullups too if you're
going to use them as active-low switch inputs

I'd be wary of using a solenoid on the same supply as the PIC. When
it pulls in there will probably be a spike go right through Vcc. I'd add a
diode, maybe a BAT46 or 1N914, from 5V to the 78L05 (replacing
the short track between the two green dots in the top left of the picture)
and a diode, eg 1N4001, from the first green dot to the solenoid. Also
add a reservoir cap, say 220uF - 470uF, from the top of the solenoid
coil to ground. The coil also needs a reverse 1N914 across it to soak
up the spike when the coil de-energises, and you could omit the 0.1uF
that's there

The 78L05 will not regulate with only 5V input, and can be removed.
The 12F675 goes down to 2V and the internal oscillator is fairly
stable across the Vcc range

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