This percussion circuit was found in an Electronics World of 1968. The transistor may be general purpose and the power supplied at 12 V. The signal must be applied to an amplifier.
The circuit presented is based on a mechanical tuning fork. The circuit is suggested by National...
We found this circuit in the March 1999 issue of Electronics Now magazine. The indicator used is...
This circuit uses an optocoupler with a phototriac or optotriac to drive an external triac. The...