This is the receiver circuit for the previous transmitter. The circuit has a programming key to decode the signals. This key must have the same transmitter code.
This circuit is from an American magazine Popular Electronics of March 1991. The circuit produces both...
This circuit was found in old documentation. D1 can be a diac. | Clique na imagem para ampliar...
I found this circuit in an old British magazine from 1976. It is possible to test operational...