First Project

Inserting the Integrated Circuit

Connect Power to Bus Bar

Jumping the Power Buses

U1A 1 14 VCC

1B 2

74xx

21

13 2D

NC 3 12 2C

1C 4 11 NC

1D 5 10 2B

1Y 6 9 2A

GND 7 8 2Y

Pin Out

Connect Power

Connect Inputs to Chip

Connect Inputs to Switches

Connect Output to Chip

Connect Output to LED

Connect Unused Inputs

All Switches Off

Output LEDs

Some Switches On

Output LEDs

All Four Switches Up

Output LEDs

Conclusion