Found in Radio Electronics from the 90s, this circuit is intended for analog TV applications of the time. The transistor used as well as the module are uncommon components today.
The configuration shown in the figure uses two NPN transistors activating the load when the input...
It is a 13.8 V x 10 A regulator obtained in a 2008 documentation. The 2N3055 transistors must be...
This timer of 10, 25, 45 seconds and 5 minutes has its times selected by the keys. The circuit drives...