Introduction - If you have any usage issues, please Google them yourself
AVR microcontroller ATMEG8, ATMEG16A interrupt handling external buttons, similar to the PC-keyboard with a detailed process description (English), a certain look. Features • Interfacing Standard PC AT Keyboards • Requires Only Two I/O Pins. One of them must be an External Interrupt Pin • No Extra Hardware Required • Complete Example in C, Implementing a Keyboard to Serial Converter