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The goal of this project is to provide everything you need to build your own eXtreme Feedback Device (XFD) at a reasonable cost (round about 10 Euros).
My own first prototype uses a PIC18F2550 micro controller (it is a little bit to big for this purpose, but I had one at hand). To show the build state it already uses the traffic light gadget:
This one still lives on the breadboard:
