Hi All,
I'm an absolute rank amateur at electronics (although I did A Level physics 20 years ago!) but a keen photographer and thought it'd be good fun to build an audio flash trigger to capture balloons bursting, etc.
I started with this:
but the piezo disc was nowhere near sensitive enough, only rapping it with a pen would cause the flash to fire.
My second attempt added an 741 op amp to try to boost the piezo signal, but the same problem remains..
I'm awaiting a delivery of an SCR that I'm intending to build this with:
http://hiviz.com/tools/triggers/makeown.htm#st
I assume the SCR is more sensitive to the piezo disc.
Can someone cast an eye over my circuits and let me know where I might make improvements to the sensitivity of the disc, or will I need to wait for the SCR?
Thanks in advance,
Nic