Receiver for FM Infrared Audio Link (CB20978E)

This circuit was found in a Popular Electronics from the 90s. The components admit equivalents and the phototransistor can be of any type.

| Clique na imagem para ampliar |

Darlington photo relay (CB8315E)
Found in Ferranti's 1968 documentation, this circuit uses a Darlington photo transistor to drive a...
Light level control (CB20718E)
Found in documentation from the 70s, this circuit uses components from that time. Some of these...
Battery Monitor (CB15080E)
This circuit monitors the state of a 12 V battery and can be used directly with one, or even in a...