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 filter rejects signals below 300 Hz and signals above 3000 Hz, being used in...
The circuit presented was found in the ON Semiconductor manual. In it we have a way to protect the...
I found this circuit in an English magazine from July 1982. The circuit is still viable because all...