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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Old RIAA Equalizer (CB1375E)
This circuit is from a Japanese magazine of 1973. The circuit is designed to withdraw the power...
Special Sound Generator (CB4454E)
This is an interesting sound effects circuit that uses only discrete components. Components are common...
Burned Lamp Detector (CB15721E)
This circuit causes a green LED to light up when we step on the brakes and the rear lamps to light...