Bench power supply (CB23831E)

This is a simple variac type source found in the July 1962 Radio Electronics magazine. Voltage and current depend on the transformer.

Dual-intensity LED (CB22128E)
This circuit switches the brightness of the LED. We found it in an English documentation....
Timed Photo-Electric Automation (CB13146E)
The circuit shown in the figure triggers a relay when S1 is pressed, but this only in the absence of...
Astable (CB19898E)
This astable multivibrator is one of the many configurations that we have in this section and on...