Computer Input Output Questions Medium
The working principle of a keyboard involves the process of inputting data into a computer system. A keyboard is an input device that allows users to enter alphanumeric characters, symbols, and commands into a computer.
The keyboard consists of a set of keys, each representing a specific character or function. When a key is pressed, it triggers a mechanism that generates an electrical signal. This signal is then sent to the computer through a wired or wireless connection.
Inside the keyboard, there are multiple layers of circuits and membranes. These layers are designed to detect and register the key presses accurately. When a key is pressed, it completes an electrical circuit, allowing the current to flow through the corresponding circuit and membrane layers.
The keyboard controller, which is a microprocessor embedded within the keyboard, receives the electrical signals from the pressed keys. It then converts these signals into binary data, which represents the specific character or function associated with each key.
The binary data is then transmitted to the computer's operating system, which interprets the data and performs the desired action. For example, if the user presses the letter "A" key, the keyboard sends the corresponding binary code to the computer, which displays the letter "A" on the screen.
Additionally, keyboards may have additional features such as multimedia keys, function keys, and special keys for specific purposes. These keys are designed to provide shortcuts and quick access to various functions and commands.
In summary, the working principle of a keyboard involves the detection of key presses, conversion of these presses into electrical signals, and transmission of these signals to the computer for interpretation and execution of the desired actions.