Well I posted a video of my finished turn signals, everything seems to be working well and have over 6000 miles driven with them through about 10 states, not one problem. I would ultimately love to control them from my iPhone, and I am looking into ways of doing this use WiFi or even the cell network (I would incorporate more in to the system if I did this with cell connectivity) I tend to lean to the WiFi system it’s cheaper and draws less power. I might end up switching the system to a keyed power source so it is inactive when the car is off but for now this works.
Make a robot friend with Adafruit’s CRICKIT – A Creative Robotics & Interactive Construction Kit. It’s an add-on to our popular Circuit Playground Express, FEATHER and other platforms to make and program robots with CircuitPython, MakeCode, and Arduino. Start controlling motors, servos, solenoids. You also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends your boards so you can still use all the goodies on the microcontroller, now you have a robotics playground as well.