One wire, two states
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Click the button in the schematic and watch the lamp follow it.
Last lesson we said digital design uses only two values, 0 and 1. On real hardware those values are voltages on a wire:
- High: a voltage near the supply. Logic 1.
- Low: a voltage near zero. Logic 0.
Click the button in the circuit above and watch the lamp follow it. One wire, two states, nothing in between. A whole computer is billions of transistors playing this same game at once.