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GitHub - PaulStoffregen/PS2Keyboard: PS/2 Keyboard Library for Arduino
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Turn your ProMicro into a USB Keyboard/Mouse - SparkFun Electronics
eeprom - Using Arduino as Keylogger - Arduino Stack Exchange
Turn your ProMicro into a USB Keyboard/Mouse - SparkFun Electronics
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USB HID
Pro Micro Mini Ss Beetle Virtual Keyboard Atmega32u4 Module For Arduino 16mhz 3.3v 5v Io Uart I2c Spi Pwm Interface Board - Integrated Circuits - AliExpress
PS/2 Keyboard Or Mouse using Arduino -
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USB Host Shield Library, For Connecing Other USB Devices
USB Host Shield « Circuits@Home
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