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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Arc Suppressor with SCR (CB13840E)
The circuit shown in the figure suppresses arcs in contacts when inductive loads are switched. The SCR can...
Operational Relay Driver (CB11901E)
In the figure we show how to activate a relay from the output of a common operational amplifier when...
Astable Multivibrator (CB21104E)
Found in American documentation, this basic circuit uses general purpose transistors. The circuit...