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Outdoor electronic log drums. Answered

We would like to make some outdoor drums made from logs that when hit trigger a relay which turns on a light. It it is proving to be very tricky to get a reliable system. We have tried using microphones with a small circuit to detect when triggered, these have worked the best but we get many false triggers and other times not triggering at all, we have tried adding pre amps to these microphones to try to boost the signal.  We have also tried to use capacitive touch sensors on top of the logs but again, many false triggers. The set up is installed outdoors for over a month and can sometimes be made to work but then the temperature and humidity will change and this causes them to false trigger or to not trigger at all, we are currently toying with the idea of hall effect or reed sensors, many of set into each log with a neodymium magnet in the end of the drum stick.
If anybody has any ideas of how we can make a reliable system for installation outdoors that works through all the temperature and humidity changes please let me know. 

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iceng

4 years ago

Place a metal tin in your drum, screw tack it in add my dual magnet and
the piezzoTap that gives a clear signal to a uP which you program for
subsequent light patterns or drive your relay directly from the MOSFFET :-)

piezoDisc.jpgpiezoSens.png