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 conventional slow-moving circuit uses incandescent light bulbs, but can be changed to use...
This TTL dice is from an old publication from 1978, but it can still be assembled, as the...
The purpose of this circuit is to control magnetic door locks activated by the power grid. The...