Keyboard input is converted into digital signals from "summary" of Code by Charles Petzold
When you press a key on your keyboard, it causes an electrical signal to flow through a circuit within the keyboard. This circuit is designed to detect which key has been pressed based on the location of the signal. Each key on the keyboard corresponds to a specific electrical signal that is unique to that key. The electrical signal produced by pressing a key is then transmitted to the computer as a digital signal. This digital signal is a series of binary digits that represent the key that was pressed. The computer can interpret these binary digits to det...
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