Thought I would share my latest Propeller based gauge project. It is a battery powered wall gauge; well really 5 gauges, that displays the charge state from my wife's Tesla. A raspberry pi is used to pull charge data from the car and send it to a Propeller in a 32 bit infrared packet. The Prop decodes the packet and drives a motor circuit attached to a small stepper motor.
The 5 gauges show overall charge of the vehicle's battery from 0 to 100%, projected range based on driving habits, total kilowatt hours for last charge, estimated cost of last charge, and time to complete current charge. I also posted some pics of the wood working in a blog at https://www.wallgauge.com/post/charge-range-gauge-for-my-tesla-model-x