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.
February 25, 2015 - Mouser Electronics, Inc., the global authorized distributor with the newest...
This circuit can control the speed of Motors up to 2 A and voltages in the range between 3 and 12...
This two-input limit detector was found in an American 1980s documentation. The circuit can be...