Binary demonstrator (CB22148E)

This circuit serves as a binary demonstrator using 3 LEDs. The circuit can be scaled up for a higher count.

Tunnel Diode Transmitter (CB19425E)
This low power circuit for the FM band was found in a spy book from the 90s. The tunnel diode is...
Expanded range for LED (CB7941E)
This circuit was found in a 73 amateur radio magazine from the 90s. An LED extends the scale from 0...
Oscillator with voltage comparator (CB9050E)
For the component values used in thisf this circuit, the frequency can be adjusted between 740 Hz and...