From prohibition-era moonshiners to the 2000s MTV classic Pimp My Ride, people have repairing, upgrading, and modifying their cars for a long time. More recently, low-cost microcontrollers like the Arduino have opened new doors for makers looking to do fun and interesting things with their vehicles.
Projects covered here are:
Speed display for your windshield
Turn signals upgrade
Remote start using a laptop or smartphone
Colored interior lighting with Bluetooth-controlled LEDs