This figure above is the prototype and hardware of our project "Body Detector". Body detector is built for the purpose of security by detecting the presence of human body in actual distance. It detect metal that attached to the human body and metal sensor will be the input to detect the presence of human body. Our objective to built this project is to study on the possible sensors that involved in this circuit and also to develop, built and test an electronics circuit involved. The actual hardware of this project supposedly have two part of circuit board, however we changed it become one part only to make it easier to construct. Therefore, the hardware come up with the small size of casing and hardware.
From the figure of the hardware above, you may see the design which is it look like a 'music box'. At the middle of the casing top, there is two l.e.d and one coil. The green l.e.d is function as indicator lamp which is to indicate the current flow. It will turn On once the supply is ON. The red l.e.d is function to alerting people once the metal sensor sense any human body approaching it. It will work together with buzzer, the piezo with trigger and the red l.e.d will turn ON. Meanwhile, at the middle of the casing is a coil. The coil is our metal sensor, it function to sense any metal that approaching it. Then, at the left side is the power supply battery 9v and a switch of the red l.e.d. At the right side is potentiometer 200W-500W. It function is to adjust the buzzer sensitivity. It work together with variable resistor (VR2).
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