One of our first prototypes. If I remember correctly this was the second iteration.
The processing unit in this prototype is an Arduino Micro. You write the code in the arduino IDE in your PC and just use a mini usb cable to upload it
Excellent! May i see that code to have an idea about what exactly it does? Excellent concept! Congratulations for the success!
Let me try to find that code, Its been like 2-3 years since the last time I used it.