I want to find a simple, easy, small, solid circuiti to detect environment sound pressure level
can anyone post a good schematic?
thankyou
Sparkfun has a damn small
Sparkfun has a damn small electret microhone breakout board with amplifier. Here is the schematic.
no luck with my schemait
no luck with my schema
it works fine, but is very prone to motor noise
i have tryed to decouple all inserting caps and inductors but it seemms that motor produce frequancy near to audible band so it's tricky !
sparkfun is interesting piece of hardware... wandering if it's immune to noise