This charger was found in the February 1978 issue of Radio Electronics magazine. The circuit is for low current, only 150 mA, and has a 12 V transformer in the power source.
Suggested by a 1968 Motorola power semiconductor manual, this circuit uses a special transformer and...
This windshield wiper timer was obtained in an 80's Hands On. The transistor can be the BC548 and...
Both the operational amplifier and the diodes admit equivalents in this circuit suggested by...