Constant current source (CB8697E)

This circuit was found in a 1968s European documentation. It is a current regulator using complementary general-purpose transistors.

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10 Hz to 10 kHz Voltage controlled oscillator (CB20600E)
This circuit was found in documentation from the 80s. The components are from the time, but the...
Oscillator with Relay (CB19779E)
We can make an oscillating relay producing a rectangular signal taking advantage of the inductance of...
Voltage Follower (CB16230E)
The circuit shown in the figure is a voltage follower, that is, an amplifier with unit gain. The...