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Logic Gates Experiment (AND and OR gates)

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Aim : To verify the truth tables of OR and AND gates using diodes.

Apparatus : Two diodes (ex: IN 4001), 5k Ω resistor, a 5V dc source, voltmeter (0-5V); SPDT toggle switch; tap keys, etc.

Theory : A switch that can be opened or closed is known as a gate and the two positions of the switch can be described as gate open and gate closed. Thus a gate circuit has two possible states described as ON or OFF, True or False, Yes or No, High or Low and so on. These two states can be represented by the binary digits 1 and 0.