The Craziest Builds from Maker Faire 2012

It's time to go cycling. Gregory de Gouveia built this big bike clock from junk cycles people had thrown out. By rigging up combinations of 4:1, 3:1, 2.5:1, and 2:1 gear ratios, de Gouveia got the 12:1 and 60:1 ratios necessary for a proper timepiece capable of clocking seconds, minutes, and hours.?

A combination of a car battery and solar panel keeps the cycle clock ticking. The piece will run on solar power alone, but de Gouveia demonstrated to PM that if even a tiny portion of the panel were temporarily shaded from the hot California sun, the clock would slow down and get out of whack.

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