2-way intercom (CB23561E)

This circuit was found in Radio Electronics magazine from June 1958. The maximum distance depends on cable losses. More stations can be added.

| Clique na imagem para ampliar |

Active Antenna (CB25195E)
This circuit for signals up to 30 MHz can improve your reception in the medium and short-wave...
Temperature Transmitter (CB18756E)
This circuit can be used as a shield for transmitting the temperature of a sensor. The circuit is from...
Signal Injector (CB18181E)
This astable multivibrator follows the traditional configuration for use as a signal injector, found in...