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 2004 circuit is based on the ionization effect that occurs in old incandescent lamps with...
This circuit was found in documentation from the 1950s. Note the low supply voltage. The circuit can...
We found this circuit in a 90s Electronic Design. Through a capacitor it can increase the growth...