Manual Clock 7400 (CB22411E)

This circuit to produce clock pulses is manually driven. The circuit is TTL and must be powered by 5 V.

Audio Noise Generator (CB13438E)
This circuit was obtained in an American publication in 1978. It generates noise in the audio...
Approach Alarm (CB24079E)
This approach alarm circuit was found in the September 1970 Radio Electronics issue. The 1 mH coil...
IR Sensor DC Motor Reverser (CB18029E)
We found this motor control circuit that uses only transistors in a 2003 documentation. The H...