sense obstacle in path... material required we need1-photo sensor1-LEDs 1-battery1-piece of small wooden slabsome wire for connectionsome adhesive ....to fix sensor's fixing of photo sensor fix the photo sensor in front of led.. as in pic with help of adhesive on wooden slab connection conn...
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ashwinisinhaContinue Reading »from Instructables: exploring http://ift.tt/1F75lqR
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