"...it's still a public forum, anything posted in here could be done with or without your agreement by xyz person..."

It was a joke. Except if you built it Steve, then I want my money!! :-)

I used to launch the rockets using a 6v lantern battery. I guess it wouldn't take much to figure out what is needed. The little relays would be a good idea.

As for timing. I was thinking more along the line of pushing PLAY on the stereo at the same time as pushing "START" on the firing system and doing all the timing strictly on the PIC. So, each "Show" would be its own program. Your idea may be easier to "program" though using some sound editing software and offsetting the right channel for the launch signals to allow for timing of the launch to the explosion.

What about safety measures when hooking up the igniters to the fuses and starting the PIC hardware? I've been thinking of a separate physical switch that would apply the igniter voltage to the system once the software was running and stable.

Bart