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

2) Press anyone of the switch(D0 - D4) 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)Check the values of inputs and output in table accordingly.

Experiment to perform logic of 4x2 Encoder

Supply

D3

D2

D1

D0

Vcc: +5V

R1: 330 ohm

R2: 330 ohm

GND

GND

Q1

Q0

7432(ORGate)













        TRUTH TABLE                                 

S.No. D3 D2 D1 D0 Q1 Q0