Ever since Shimano introduced the Di2 system for Dura-Ace, electric shifting has been a talking point — if not the envy — of many a cyclist. The price, however, has put Di2 (and now Campagnolo’s EPS ...
Explore an innovative electronics project as we build a unique smartphone charging system using two DC motors. Step-by-step, watch how we assemble and connect motors to create a homemade USB phone ...
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