PHASE 1
Build the circuits
74HC00Select a component, then its highlighted board location.
74HC00
Input LEDs A and B Output LED Y
PHASE 2
Verify the truth table
Select your predicted output before testing.
Input LEDs respond to A and B. The output LED remains unrevealed until the learner predicts Y.
NAND truth table
| A | B | Prediction | Observed Y |
|---|
0 of 4 required combinations tested
PHASE 3
Practice and assessment
Practice remains locked
Complete the tests for NAND, NOR, XOR, and XNOR first.