This windshield wiper timer was obtained in an 80's Hands On. The transistor can be the BC548 and the relay is 12 V sensitive. The time is set to R3.
This circuit was obtained from an English magazine from 1976. The circuit activates a sensitive relay...
This circuit can measure audio output power up to 50 W. The circuit is wired to the output of an...
This circuit can be used to obtain a zener voltage from a common zener of another value, adjusting...