This circuit was suggested by Texas Instruments in a 1980s documentation. The transistor must be equipped with a heat sink. The transformer has 10 A secondary current.
This circuit was found in the March 1990 issue of Radio Electronics magazine. The circuit can be...
This 4-transistor timer was found in the April 1975 issue of Radio Electronics magazine. It uses...
This circuit was found in Mullard's transistor application manual from 1960. The circuit can be...