What is the keyboard circuit board?
Keyboard circuit board is a sheet or panel in a computer keyboard to perceive when the key is pressed, determine which key has been pressed and send information to your computer or other devices to which the keyboard is connected. There are two main parts that contain the keyboard circuit board, with the largest and most important section to be under the physical keys that can be pressed. Although there are different mechanisms that can be used, this area generally uses a pattern of circuits that are either completed or broken when the key is depressed, and communicate the keyboard controller location of the pressed key. On the keyboard circuit board is also a microprocessor known as the keyboard controller, some read -only memory (ROM), which is used to store information about what keys equals what characters and some type of hardware interface to send key data to another device such as universal serial bus (USB) or serial port. The real material from which they make themOn the keyboard board, there can be metal, epoxy or thin leaves of plastic on which the necessary circuits are printed.
There are two primary methods that can be used on the keyboard circuit board to capture key presses. The first method includes the location of a small conductive plate on the bottom of the physical keys. On the circuit board below the keys there is a formula of incomplete circuit roads. When the key is depressing, it completes the circuit on the board and sends the signal to the controller that informs it about the located button. The controller can then use a table stored in the ROM keyboard to determine what character is here.
The second method, which also often occurs in the keyboard, includes a keyboard circuit board that is covered with a pattern of active and completed circuits. Sometimes it is called a capacitive keyboard, the Establishing Signal constantly passes through this type of keyboard board. On the underside of each key is a small plate that when it isThe key is pressed, gets close to a number of circuits to change the charge under the perimeter below. This current change is detected by the keyboard controller to determine which key has been pressed.
The material from which the keyboard board is actually made may vary. Older models can be made of metal, while other types can be made of layers of thin plastic leaves with circuits printed on their surface; They are often called printed circuits. In addition to the area of the circuit board used to detect key presses, the board usually also contains a microchip - known as the keyboard controller - which acts as a very basic processor and usually contains a ROM and a digital comparator for basic calculations. The circuit board also has a connected type of output interface, such as an asir connector or a wireless transmitter, so the information can be transmitted to the device used by the device.