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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500 MHz Oscillator (CB19430E)
Of course, with a change in the cable length, the frequency can be changed as long as it is within...
Power Oscillator (CB12586E)
This circuit is basically the same configuration as the previous one with a power stage with...
Ultra Long Period Timer (CB25049E)
Using the ZN1034E which reaches 19 days interval, this is a simpler circuit which can be...