Driver Darlington (CB8957E)

This circuit was obtained in a 1960 documentation of General Electric. It is applied in the control of registers of the time.

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3-transistor amplifier (CB23537E)
This transformerless 16-ohm speaker circuit was found in a Radio Electronics from October 1963. The...
Solar power source (CB20481E)
In the figure we have a solar power source for experiments with this type of energy. The cells must...
Digital Capacitor Meter (CB17506E)
This circuit was found in a 1986 documentation and it may be difficult to obtain some of its...