1) Connect the Supply(+5V) to the IC.

2) Press anyone of the switch(A and B) for which you want to get your corresponding encoded output.

The switch in ON state is and the switch in OFF state is .

3) Now, Check the corresponding output LED glows or not.

4)Also press "ADD" Button to add the corresponding result and

Check the values of inputs and outputs in table accordingly.

Experiment to perform logic of 2x4 Decoder

Supply

A

B

Vcc: +5V

R0: 330 ohm

R1: 330 ohm

R2: 330 ohm

R3: 330 ohm

GND

Q0

Q1

Q2

Q3

7408(ANDGate)













        TRUTH TABLE                                 

S.No. A B Q0 Q1 Q2 Q3