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 1998 documentation. The circuit causes defects in the ignition system,...
The purpose of this circuit is to power a small fluorescent lamp from from a 12 V battery. The circuit...
Found in a 90s Popular Electronics, this circuit uses two PLL tone recognizers to trigger by touch an...