August 20, 2008 AT 4:26 pm

Speed-Vest (take that, Leah!)

This vest uses a ‘nixie’-like numeric display system to show the speed of the cyclist. It seems that the builders used the hall effect sensor from a bikecomputer to calculate the RPMs on an Arduino and then turn that into MPH which is displayed using triacs (im kinda guessing here)

Compare to the SpokePOV kits hacked by MadOverload to display RPMs for a killer-bot!

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