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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VHF and UHF Oscillator (CB13089E)
The configuration shown in the figure is one of the most traditional when it is desired to produce...
Simple Burglar Alarm (CB16280E)
This burglar alarm is highly efficient, depending of course on the care with which it is...
Shunt regulator (CB21217E)
This shunt voltage regulator was found in an Electronic Design from the 90's. The power transistor must...