Baseado num arduino chega algo interessante para quem gosta de andar de bicicleta à noite.
(https://lusorobotica.com/proxy.php?request=http%3A%2F%2Fmykle.com%2Fspeedvest%2Fvest.jpg&hash=79941c33317a2dc17bdda4221852cb1664f14a03)
http://www.mykle.com/msl/?p=10 (http://www.mykle.com/msl/?p=10)
http://www.speedvest.com/ (http://www.speedvest.com/)
Pode-se adicionar ao projecto dos piscas...
http://web.media.mit.edu/~leah/LilyPad/build.html (http://web.media.mit.edu/~leah/LilyPad/build.html)