Tonight I put together another sound activated switch
and instead of wiring it up to a flash I wired it up to my other invention .... the sparking machine !
Now when there is a sound it triggers the coil which switches via a relay at around 20X per second and generates up to 25000 volts .
I took an old power cord and joined the wires to the output and modified the end of the cable to provide a controlled gap for the spark to jump across - probably around 10000 volts .
Now I need to work out how to fill a balloon with gas without letting too much escape , then I place it on top of the power cord , make a noise .... boom !