Based on Radio Shack 276-137, this circuit was found in the December 1995 issue of Electronics Now magazine. The circuit drives an LED but could use a relay instead.
The great advantage of the circuit shown in the figure is the fact that its frequency is...
Found in American documentation from 1969, this circuit produces a pulsating waveform being...
Found in an old Elektor, this circuit uses two 7-segment displays to indicate the volume of an...