The circuit is from a Radio Electronics magazine from October 1987. The Triac must be equipped with a heatsink and the transistors are general purpose.
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...