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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Capacimeter (CB4472E)
This circuit is suitable for testing motor starting capacitors. Capacitors from 2 to 8 uF are...
4-way logic test (CB8908E)
This circuit was found in a 90s Popular Electronics. The circuit uses 4 bicolor LEDs to indicate...
Electronic Metamorphosis (CB16781E)
This circuit causes the light of a bicolor LED to change when it is turned on. The time of...