Plain-English explainers for every logic gate, number system, and core concept behind digital circuits. Each with a truth table and a one-click handoff to the simulator.
AND gate — The gate that fires only when all its inputs are on.
Binary — Base 2 — just two digits, and everything a computer thinks it knows.
Buffer — A gate that does "nothing" — on purpose, and usefully.
Hex Display — Four bits in, one glowing hex digit out — watch binary become a number.
Hexadecimal — Base 16 — ten digits plus A through F, and four bits per character.
NAND gate — AND with the answer flipped — and the only gate you ever really need.
NOR gate — OR with the answer flipped — on only when everything is off.
NOT gate — One input, one output, and a permanent disagreement between them.
OR gate — The gate that fires when any of its inputs is on.
XNOR gate — The gate that fires when its inputs agree — the equality detector.
XOR gate — The gate that fires when exactly one of its inputs is on.