Harmonic generator (CB8989E)

This circuit generates a 1296 MHz signal from 100 or 1,000 kHz crystals. We found it in an American documentation for radio amateurs.

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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...
Temperature Control (CB1575E )
With the figure circuit it is possible to control the amount of heat generated by the heating...