This tachometer and dwell meter for old cars was found in a 1975 documentation. The circuit is a reference for those who want to recover or maintain an old car.
This 80's circuit uses a germanium transistor like the AC121. The circuit has an output...
This circuit is from the Motorola Linear Databook of 1990. The circuit controls a Triac from a...
I found this circuit in a Popular Electronics from 1992. The circuit shows how we can receive...