Help! Triggering with very small voltages
Hi gang!
My friend is trying to make an art project in which 2 mylar balloons trigger little audio snips when they hit one another. she has got these little play\record boxes that are triggered with a push switch. I have found that running 9v through the balloons with a multimeter in series set for the sensitive 2v (.000) setting usually responds with from .001 to .050vdc when they hit each other..
i want to take this small input, and trigger a relay..i have a basic stamp available and tons of cmos and ttl logic if that helps.. i can order parts..
i think i need an op amp circuit to trigger a 555 latch of some sort? yeah?
Even suggestions of how to search google for this info would help. I tried 'mesuring small voltages' and it is all about differential voltage measurements for current sensing.. :(
Thanks!