If you cycle for fun, exercise, commuting, or compulsion, it's important to be well-lit and visible at night. Keeping the helmet lit is a good option because it gives your head extra protection. This helmet, the next in our Lumenhattio project series, has accelerometer-controlled turn signals--jus...By: dukode
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Source: http://www.instructables.com/id/Accelerometer-controlled-LED-Bike-Helmet/
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