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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Touch Switch (CB10924E)
This circuit was obtained in a 1991 Electronics Handbook. The publication no longer exists, but...
Charge & Discharge Sensor (CB5262E)
This circuit provides an output voltage with the absolute value of the charge and discharge current...
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With the figure circuit it is possible to control the amount of heat generated by the heating...