Twilight Simulator (CB26055E)

This circuit simulates dusk by slowly dimming an incandescent bulb. It was found in the August 1998 issue of Electronics Now magazine.

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Solid state relay (CB8861E)
This circuit, which can act as a shield, was found in a 1969 documentation. The circuit uses...
Crystal Oscillator (CB19356E)
This oscillator can generate signals from 100 kHz to more than 50 MHz depending on the crystal used...
1 kHz injector (CB19587E)
This simple multivibrator circuit generates a 1 kHz signal rich in harmonics. The circuit is from...