PLL (CB7971E)

This common operational PLL circuit was found in a Popular Electronics 90’s. The power supply need not be symmetrical.

Undervoltage switch (CB22006E)
Using a CA3130, we found this circuit in an English publication from 1977. The circuit must use a...
3 LEDs Flasher (CB16409E)
We found this circuit in a 1980 documentation. The flasher uses 3 transistors in the configuration of an...
Reversible universal motor control (CB8011E)
This circuit was found in General Electric's 1965 documentation. It appears elsewhere on the site....