Intercom gain remote control (CB6294E)

This circuit was found in a 1964 Electronic Design. The circuit can be implemented with equivalent modern transistors. Note the high supply voltage.

| Clique na imagem para ampliar |

Electronic Rotary Switch (CB10652E)
This circuit was obtained in a 1999 English magazine. We can easily assemble it because all the...
TTL interface for CMOS (CB7036E)
Suggested by Harris in documentation from the 80s, this circuit uses components from that time. It...
Bootstraped Source Follower (CB6156E)
This configuration was found in an English magazine from 1965. It is valid for any junction FET. The...