Acura steering wheel volume control implementation
I went through Buybytes FAQ on hacking your steering wheel contols but all the solutions seemed more complex than I wanted to dig into so I designed my own simple circuit. This is an implementation of using the Acura steering wheel volume/mute buttons to control the volume on my laptop carputer using parts from Radio Shack. The circuit is designed to interpret the different resistance values on the two wire steering wheel bus and activate relay switches that are hardwired to the volume control switches in the laptop. Originally I had the mute button going to the mute control on the carputer but later decided a better use was controlling the mute on the radar detector mounted in the back of the car.