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Pulse Necklace 11Oct2009
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==Conductive Thread-based Prototype== I sewed us another prototype using conductive thread, rather than the silver paint. Both Eric and I like the look of the thread, though making this choker is more labor intensive. It'll be faster with a sewing machine...assuming I become competent. To attach LEDs, Eric curled the legs into loops. Then I sewed the LEDs onto the thread traces like buttons. For the connection from the choker to the Arduino + board, I sewed jewelry hoops at the ends. The wires from the Arduino + board can be attached to clasps, which then hook through the hoops. However, for speed prototyping, we just soldered the wires to the hooks. We attached a 9V battery to power the circuitry. LEDs lit, and everything was functional! The blinking was still finicky - we'll focus on the signal processing later. We learned that the weakest point for conductive thread is knotting. Two of the three hoops broke off, because the knots undid themselves. They stayed the second time around when we knotted many times over. Overall, conductive thread works well as long as knots are tight and thread ends do not short each other.
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