This circuit produces the sound of a motorcycle or an outboard motor. The frequency is adjusted in the pot. For supplies above 9 V the BD136 must be equipped with a small heat sink.
This circuit was found in a factory manual from the 1980s. It can serve as the basis for an...
ON Semiconductor NTMJS1D5N04C 40V Industrial MOSFET Available from Mouser Electronics, these ON...
This circuit uses bipolar transistors and unijunction transistors to generate a linear ramp in...