LJ POLYTECHNIC PROJECTS/MODELS
METAL DECTOR AND CLIP SWITCH
This is a simple magnetic levitator, which suspends objects a set distance below an electromagnet. The physics behind it is to simply provide a magnetic force, which equal and opposite to the gravitational force on the object. The two forces cancel and the object remains suspended. Practically this is done by a circuit, which reduces electromagnet force when an object gets to close, and increases it when the object is out of range. This circuit works by comparing the signals from the sensors with the first op-amp and sending out a voltage proportional to the difference or "error".
(Mechanical Engineering Sem-4: Bhavin Joshi, Vatsal Patel, Harsh Nanavati, Harsh Bhathavi)
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