This 9 V battery eliminator was found in Radio Electronics magazine from June 1966. The transistor is of medium power and must be equipped with a small heat sink.
This circuit doubles the frequency of a signal using a varicap. In this case, the input is 28 MHz,...
This receiver for infrared remote control was found in the Philips Databook of 1990, The circuit...
This traditional triac power control circuit can control loads up to 1000 W. The triac must be...