Receiver for the 40m band LM602 (CB25305E)

This circuit uses an FM IF transformer for tuning. The circuit is from a Radio Electronics magazine from April 1990.

Symmetrical 12 V regulator (CB20283E)
This circuit uses a 7812 and another regulator integrated circuit that is not very common...
20 LEDs Flasher For Christmas Tree (CB4420E)
The project is from a 1992 publication, but totally current by the components it uses. The LEDs...
Astable Audio Multivibrator (CB16329E)
We have a simple and useful circuit found in a 1982 documentation which generates a signal in the...