![]() The Arduino board has all the required circuitary to get the built-in AVR microcontroller running. There is no other tool available which helps in easy prototyping like the Arduino does. This project explains how to interface a standard ASCII keyboard having PS2 interface with the Arduino board. The PS2 keyboard can send the equivalent ASCII value of the key which has been pressed. Due to its simplicity the PS2 keyboards are widely used with simple microcontroller based boards also. ![]() The PS2 is a simple synchronous serial protocol using only two wires for communication. Keyboards are interfaced in basically using two methods one is through USB port and the other through PS2 port. The PC are mostly using QWERTY keyboard which has evolved from the mechanical typewriter device. In case of the Personal Computers a group of keys are arranged in a single board called keyboard. The key input can be found in electrical, electronic and mechanical devices. A key is the most basic input device for a system which can do some process.
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