This crystal-based circuit can generate accurate 50 or 60 Hz signals. The circuit is from a November 1998 Electronics Now magazine. The output signal consists of rectangular pulses.
This stage circuitry for amplifying microphone signals makes use of germanium transistors as indicated...
In this circuit, the relay remains closed by activating a lamp, for a time that depends on the...
With this circuit we can demonstrate the operation of a Schmitt trigger using TTL logic. The...