Data interface for analog TV (CB7171E)

This circuit was found in an old Electronic Design used to apply digital signals to an analog television.

| Clique na imagem para ampliar |

Telephone dialer (CB21268E)
This circuit was found in Electronics Now. With it the dialing signals of a telephone are...
Dual-intensity LED (CB22128E)
This circuit switches the brightness of the LED. We found it in an English documentation....
Simple metal detector (CB7960E)
This circuit already explored in several diagrams in this section was found in a 90’s Popular...