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 is from Motorola's Linear Databook from 1990. The integrated circuit used is no...
The figure shows how to connect a relay to obtain the latch effect. The circuit is from an...
Suitable for the use with sensors, this circuit from National Semiconductor appears in other...