12V Charger (CB6399E)

We found this circuit in a 1968 Motorola publication. The circuit has a charge current of 16 A which determines the current of the transformer.

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Logic level shifter (CB7254E)
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MOSFET Electroscope (CB1392E )
This circuit is from a 1976 documentation. It makes use of isolated gate MOSFET which is already very...
Musical 5-Note Buzzer with the 4017 (CB12143E)
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