boloblinky

I originally made this as a swag bag tchotchke for my 11-year-old son's birthday party. It is designed so that the kids could build it themselves and get an introduction to soldering and acquainted with micro-controllers, programming and making stuff. My only two design parameters is that it had to be easy and relatively cheap - it had to be under/around €10 and came in at €9.81 including the PLA for the case and 4 batteries.

I decided on the nano and the max7219 because I've used them both