i built this secuarity alarm for hiding my machines and tools from my family it is based on simple mechanism and also looking simple.. things you will need: 6 volt battery,screwdrivers,wires,motor with heavy unstable weight,plastic strips ,screws,any metal trigger with wire and your locker compar...By: shivam kale
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from Instructables: exploring - technology - robots http://ift.tt/1NxT5WI
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