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 turns on and off when a short pulse is applied by SW to the input of the first...
This circuit is from Radio Electronics. The magazine no more exists, but the circuit can be...
Found in a 1980s publication for amateur radio, this circuit employs an MC1596G which is a...