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 with two HT2030s powers 6 LEDs in a decorative flashing system. The circuit is from...
The regulator for TTL source is from the SGS linear integrated circuits manual. The integrated circuit...
The SCR sector of this circuit can be powered by high voltage AC and instead of the LEDs we can...