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 basic circuit was found in RCA / GE documentation from the 90s. In it we have the way to...
We found this version of the automotive tachometer in a 1980s publication. Variations from other...
This optical pass-through shield can be used in various applications, such as object sensing or...