DYIs march ride to a different drum beat. While many are more than satisfied with a cheap $30 computer, there’s always that guy who shows up on a ride with this. A mad scientist meets Mad Max approach to determining speed and distance. Total cost in materials was roughly $90, but that feeling of accomplishment is priceless.
Jump past the break for the details. The video’s in German but luckily math is a universal language.
Via the Arduino Blog
