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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High Gain Amplifier with 2 Transistors (CB25640E)
This circuit was found in the November 1993 issue of Electronics Now magazine. It uses...
36 LED sequential (CB7585E)
This circuit was found in a Popular Electronics from the 90s. The effect circuit uses components...
Triac Crowbar protection (CB15496E)
In the circuit shown in the figure, when the input voltage rises to 27 V, the TL431 triggers the...