3EC10A Digital Electronics Lab
1. To verify the truth tables of basic logic gates: AND, OR, NOR, NAND, NOR. Also
to verify the truth table of Ex-OR, Ex-NOR (For 2, 3, & 4 inputs using gates with 2,
3, & 4 inputs)
2. To verify the truth table of OR, AND, NOR, Ex-OR, Ex-NOR realized using NAND
& NOR gates
3. To realize an SOP and POS expression
4. To realize Half adder/ Subtractor & Full Adder/ Subtractor using NAND & NOR
gates and to verify their truth tables
5. To realize a 4-bit ripple adder/ Subtractor using basic Half adder/ Subtractor & basic
Full Adder/ Subtractor.
6. To verify the truth table of 4-to-1 multiplexer and 1-to-4 demultiplexer. Realize the
multiplexer using basic gates only. Also to construct and 8-to-1 multiplexer and 1-
to-8 demultiplexer using blocks of 4-to-1 multiplexer and 1-to-4 demultiplexer
7. Design & Realize a combinational circuit that will accept a 2421 BCD code and
drive a TIL -312 seven-segment display
8. Using basic logic gates, realize the R-S, J-K and D-flip flops with and without clock
signal and verify their truth table
9. Construct a divide by 2, 4 & 8 asynchronous counter. Construct a 4-bit binary
counter and ring counter for a particular output pattern using D flip flop.
10. Perform input/output operations on parallel in/Parallel out and Serial in/Serial out
registers using clock. Also exercise loading only one of multiple values into the
register using multiplexer.
Note: As far as possible, the experiments shall be performed on bread board.
However experiment Nos. 1-4 are to be performed on bread board only
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