CA3080 Amplifier (CB25131E)

This amplifier with an OTA has a gain of 40 dB. The power supply must be symmetrical. Found in Radio Electronics, May 1988.

Cascading the 4017 (CB211)
Here we show how two 4017s can be cascaded to count above 10. The circuits are driven by a square...
Photo relay (CB20885E)
The circuit in the figure represents a typical application of a phototransistor exciting a relay...
Watch Battery Rejuvenator (CB17070E)
This circuit, in fact, what it does is a reactivation of the batteries through a brief pulsating...