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.
With this circuit it is possible to use a frequency meter as a tachometer. The circuit was found in...
This 20 Hz high-pass filter was obtained in a 1965 American publication. The operational amplifier must...
This trimmer or reaper amplifier cuts the signal peaks at a voltage determined by the zener...