Using LM3909 integrated circuits, this circuit was found in an American documentation from the 90's. The frequencies can be changed by changing the capacitors.
We found this circuit in the Linear Technology Applications of 1997. The circuit uses components of the...
Devices Feature Open Immobilizer Protocol for Interoperability and Low Frequency Vector Techniques for...
Found in a 1958’s publication, this receiver uses components that are nbot easy to find in our...