After completing an android tablet install into my car, I set out to control the AC knobs with the tablet. Arduino seemed to be the best solution to accomplish this. While I've been programming for years, the hardware side of Arduino is somewhat new to me. I'm planning on using the Arduino Uno for the board, and wiring 3 servos up via a breadboard to turn the knobs via timing belts with pulleys attached to both the servo and the knob. The servos have to be powerful enough to turn the knobs. I'll also need a Bluetooth module to connect to the tablet, it will only be transmitting a few inches, so strength isn't a large concern. I've also set up a power inverter in the car to power everything, so I will need some type of power cable.
What I have so far- Board: https://www.sparkfun.com/products/11021 Bluetooth Module: https://www.virtuabotix.com/?p=373 Servos: Don't know on this one, not sure how much torque they need Breadboard: https://www.sparkfun.com/products/9567 Timing pulley/belt: not sure yet on this one either Power cable: Still need to pick one here too.
I'm trying to keep this build as cheap as possible with it still being effective. If you have recommendations or guidance as far as what to get, I would really appreciate it.