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.
Found in an old Radio Electronics, this circuit uses current components, used to rectify AC...
The oscillator of the figure has its frequency determined by the crystal. The indicated value is...
This Electronics Now circuit provides a signal when the voltage of a source drops below a...