Amplifier MFC9010 (CB20027E)

This integrated amplifier was used in televisions from the 70s, with good sensitivity characteristics. The circuit was powered with 9 V.

| Clique na imagem para ampliar |

Voice operated transmitter (CB20412E)
This transmitter kicks in when the microphone picks up sound. This sound then modulates the signal...
Door Open Alarm (CB6367E)
This 80's circuit, suggested in Texas Insrtruments documentation, uses a Hall effect sensor. The...
Rain Indicator (CB12392E)
The sensors can be screens having porous tissue between them. When the water moistens them, the...