13-05-2011, 04:19 PM
Name– study of Ex-OR logic using NAND gates as universal building blocks.
Aim – to study the working of Ex-OR gate using derived gates i.e. NAND gates.
Apparatus – IC 7400 and IC 7486, circuit board, power supply +5V DC, LED, connecting wires, soldering iron, cutter etc.
Circuit diagram –
[attachment=13804]
[attachment=13805]
Procedure –
1) Identify the given ICs.
2) Construct the circuit of Ex-OR gate using NAND gates. Use pieces of wires for connections.
3) Connect final output of the circuit to the LED.
4) Verify the working of the circuit and write down the observed truth table.
5) Write down theoretical and practical truth tables.
6) Test IC 7486 given on same circuit board by inserting the IC.
[attachment=13806]
Brief theory –
Exclusive-OR gate – it is a very special type of gate in digital electronics. It is a logic circuit whose output becomes high only when its both inputs are UNEQUAL. Its logic equation is –
[attachment=13807]
