Based on an integrated circuit of the time, this circuit appeared in the October 1979 issue of Radio Electronics magazine. The circuit monitors voltages in the range of 10.5 to 16.0 V.
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...