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.
We find this circuit in a 1980s documentation. The integrated ones are of the time and their...
This circuit was found in a 90s Popular Electronics. The circuit uses components from that time,...
This circuit generates a rectangular signal whose frequency depends on the electrolytic...