Interfacing Experiments
Interfacing Experiments
Originally uploaded by Mike QuinThe first stage in a project to build an interface between my Ford Focus' steering column radio controls and my Kenwood stereo, which lacks a wired remote interface but does support infrared.
The control stalk turned out to be a simple array of switches attached to a resistor network, meaning that it appears as a different impedance depending on which switch is pressed.
The stalk is connected to one of the Arduino's analogue input pins via a simple voltage divider.