PLL (CB7971E)

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

12 V Monitor (CB859E)
If the input voltage falls below 12 V the LED glows up. Other voltages can be monitored by...
Remote light sensor (CB7045E)
Found in an old Popular Electronics, this circuit warns when a remote lighting system is not...
Pulse generator 2 (CB8197E)
This generator is more complete than the previous one, being able to generate pulses as indicated...