Low Voltage Test (CB22158E)

This is a simple voltage tester for voltages from about 2V to about 15V with the indicated resistor and red LEDs.

Infrared Detector (CB1560E )
The circuit shown in the figure can be used to detect the operation of infrared sources whose...
Sampling and Retention (CB20151E)
This circuit is from a factory manual from the 80s. The circuit can be implemented with more...
Logic Drive of the 7805 (CB25236E)
This circuit for the logic control of the 555 in a power supply was found in the October 1989...