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Execution of Digital Logic Circuits
A safety circuit is employed on a lathe to prevent the motor turning if it is not safe to operate. A series of 2 switches are used to check end stop position and the presence of a safety guard.
a) Illustrate how a simple switch can be used to generate logic level voltages
b) Design a digital TTL Circuit using 2 input NAND gates to control the motor power relay and draw the schematic diagram .
c) Describe the operation of the circuit
d) Illustrate how this circuit can be connected to the existing transistor switched relay.
e) Build and test your circuits
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