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.
The component used in this circuit is uncommon today, as the circuit was obtained from Motorola's Linear...
This circuit was found in General Electric documentation from the 1980s. The circuit is intended...
Taking advantage of the two stable states of a tunnel diode it is possible to build a switching circuit...