3.2.1. 2-4 binary decoder experiment

Components:

• breadboard
• 5V power supply
• 5mm red, blue, yellow, and blue LED
• 2 x SPST pushbutton switches
• 4 x 2.2KΩ resistors
• 7404 NOT, 7408 AND chip with configuration:
  • Pin 14 as VCC, Pin 7 as ground
  • the rest is self-explanatory from the schematic

Figure 3‑6 2-4 binary decoder schematic

Figure 3‑7 2-4 binary decoder circuit

Explanation: Diodes are lit according to the input bit pattern – D1 for 00, D2 for 01, D3 for 10, and D4 for 11.

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