Tunnel diode simple noise generator (CB23705E)

This circuit was found in Radio Electronics magazine from November 1960. The circuit is powered by a photocell of the time.

Light Control 2 (CB22102E)
This circuit has an opposite action to the previous one, triggering when light falls on the...
5V x 10 A regulafot (CB9960E)
This configuration appears elsewhere on this site. We found it in a Motorola manual from the 70s....
100 kHz oscillator (CB10130E)
Indicated to be used as a clock, this circuit was found in old documentation. The operational of...