I'm not exactly sure what this would be called, so I will try my best to describe what I am trying to do. I just bought a newer style steering wheel for my car so now I have buttons on the wheel for my cruise control as opposed to the stalk coming out of the steering column that I currently have. I thought every button on the wheel would have its own wire and I could simply hook it up to all the appropriate functions and I would be done.
However after a little research (I haven't actually received the wheel yet), I found out that it utilizes a resistance ladder to perform all the controls. Since I don't have the wheel yet to measure the actual values, lets assume they are 50, 150, 300 and 500 ohms for each corresponding button presses (on/off, set/decel, resume/accel, cancel). All I would like to do is come up with a circuit that can "sense" what button was pressed by measuring the resistance and then close the appropriate switch which I could then connect to my existing controls.
Would I need some sort of programmable circuit to enter in the actual resistance values to the circuit I want closed, or is there existing chips that could do this for me?
I know this has to be possible and hopefully it is pretty easy to do. Any help would be greatly appreciated.
However after a little research (I haven't actually received the wheel yet), I found out that it utilizes a resistance ladder to perform all the controls. Since I don't have the wheel yet to measure the actual values, lets assume they are 50, 150, 300 and 500 ohms for each corresponding button presses (on/off, set/decel, resume/accel, cancel). All I would like to do is come up with a circuit that can "sense" what button was pressed by measuring the resistance and then close the appropriate switch which I could then connect to my existing controls.
Would I need some sort of programmable circuit to enter in the actual resistance values to the circuit I want closed, or is there existing chips that could do this for me?
I know this has to be possible and hopefully it is pretty easy to do. Any help would be greatly appreciated.