It´s based on the Arduino Micro which you can get as a clone quite cheap, so all the hardware runs around 40-50euro. If you need to add the screws it´s a few euros more. You will need about 500g of PLA filament. As I had most colors expect blue, I only needed to buy a spool for another 20euro which I can use now for other projects as well. The exact list of all parts is in the description PDF on GrabCAD.
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