Common emitter output trigger (CB8923E)

This circuit was found in a 1968s American. Transistors are of general purpose and the input is a rectangular signal of appropriate amplitude.

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Step Down Converter with uA78s40 (CB14538E)
The component used in this circuit is uncommon today, as the circuit was obtained from Motorola's Linear...
Infrared Audio Link (CB11967E)
This simulated circuit on the NI Multisim transmits modulated infrared signals with the audio...
Limiter for Nicad discharge (CB8382E)
This voltage sensor limits the discharge of a Nicad battery. We found it in an American...