On 1 February 2014 11:26, Pascal de Bruijn <pmjdebruijn@xxxxxxxxx> wrote: > I'm aware this is quasi-offtopic, but I thought some of you might enjoy it: Very much, thanks. Choosing a 18F PIC was interesting (same family as the ColorHug, and those data pins at the end sure look like an ICSP programming port :) Using glass filters probably contributed to the cost, but otherwise the board is very simple indeed. I'm kinda confused about that giant lens tho, surely the beam needs to be collimated from a narrow angle, although I don't know how the diffuser would affect things. Richard.