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 simple circuit that senses energy cables (alternating current) through the field produced was found...
This interesting game was found in a 1987 publication, but it is very simple and can be easily...
This circuit was found in a 2006 documentation. Its purpose is to control a servo system in which...