Lead Acid Battery Charger (CB26301E)

This power charger was found in a 1990s issue of Popular Electronics. Integrated circuits must be equipped with a heat sink.

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SCR Dimmer (CB14822E)
This traditional dimmer configuration for incandescent lamps and heating elements was found in an...
Negative Voltage Generator (CB16629E)
This is another possible version of a negative voltage generator using a 555 integrated circuit. The...
Vibrating Wire Oscillator (CB23899E)
A wire vibrating between the poles of a magnet works as a frequency pattern in this oscillator found in...