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 should be used with low frequency signals only. The circuit is from a documentation from the...
This circuit, found in a 1991 documentation, doubles the frequency of a TTL signal. The maximum...
The Texas TL783 integrated circuit is a three-terminal high voltage regulator with a wide range of...