• All red in the rear would have been ideal, but these were leftovers from throwies and people do so love red throwies.

Testing the circuit

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The idea here was to set things up so no resistors were needed - they would have resulted in more parts that might break off and more stuff to weatherproof. Also, more LEDs = better!

www.instructables.com/id/LED-Bike-Helmet/
biphenyl.org/blog/2007/11/28/led-bike-helmet/

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