Arduino programmers usb and ics arduino x000048 this device is an atmel atmega328microcontoller in a dil 28 package that is pre loaded with the arduino uno 16mhz bootloader using this device enables the use of arduino code in a custom embedded project without having to use an actual arduino board to get this microcontroller working with arduino ide requires an external 16mhz crystal or resonator a 5v supply and a serial connection the atmega328 is an 8 bit processor similar to the atm