Microcontroller controlled dimmer (CB25087E)

This circuit was found in a Radio Electronics magazine from October 1987. It can be used as a shield for incandescent and heating elements.

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Automatic Doorbell (CB16652E)
This circuit was found in a 1992 publication. Its purpose is to time the activation of a doorbell...
Fuel Gauge (CB26016E)
This automotive circuit was found in the June 1997 issue of Electronis now magazine. The circuit uses...
Tuned Coil Hartley Oscillator (CB25940E)
This oscillator was found in the January 1996 issue of Electronics Now magazine. The frequency is given by...