The GateForge cast
Each friend shows you one idea by how they act. Meet them all and see how the ideas fit together.
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Duet The AND gate - a firefly who glows ONLY when BOTH her inputs are on; one light alone stays dark (the both-or-nothing rule that makes two-key locks safe) -
Orla The OR gate - a welcoming firefly who glows if EITHER input is on (or both); only all-quiet leaves her dark (any one signal is enough) -
Nay The NOT gate (inverter) - a single-input firefly who is always the OPPOSITE of his friend: on becomes off, off becomes on (turns a backwards signal right) -
Odele The XOR gate - a firefly who glows ONLY when her two inputs DIFFER (one on, one off); same-and-same, either way, leaves her dark (the mismatch-finder, and the carry in adding) -
Nandi The NAND gate - off ONLY when both inputs are on, bright every other time; the humble UNIVERSAL gate you can build every other one out of -
Norah The NOR gate - glows ONLY when both inputs are off; the smallest spark anywhere sends her dark (the all-clear light; the other universal gate)