This simple SCR control was found in the December 1987 issue of Radio Electronics magazine. The circuit uses a well-known C106 but can be used in equivalents of the same series.
Found in an 80's Elektor, this circuit can control loads up to 750 mA with the BD139 and 100 mA...
This circuit generates a frequency modulated tone with excellent power. Other power MOSFETs can be...
The figure shows how to connect a 7400 to obtain a bistable configuration. The circuit must be...