Drum light trigger that uses leds, a NE555 timer and a piezo transducer

Davide Gironi writes: This circuit is a Drum Light Trigger. It uses a piezo transducer that reacts to drum vibration, and a NE555 timer to setup the light time. There are two trimmer pot, one to setup the sensibility of the vibration, the other to set how long the LED light will be active. This […]