The system that I thought needed to send messages to the driver of the car that follows us . How many times did you want to ask the person who follows you drive to maintain the safety distances . Or feel that you have finished the points on your license and you do not feel to increase the speed over the limit , even if the road would allow it .
Through an array of LEDs coupled with its structure to the car's center head restraint , I write messages to the driver of the car behind me .
The system is based on Arduino and Adafruit BlueFrui of the part BLE Bluetooth radio.
I developed an App for Iphone - Ipad that manages the composition of sentences and Bluetooth communication with Arduino .
Arduino communicates with the LED array through an SPI port .
Youy can see all my pics here
I use SketchUp to design this box