The Arduino Pro Micro is similar to the Pro Mini except with an Atmega32U4 on board. The USB transceiver inside the 32U4 allows us to add USB connectivity onboard and do away with bulky external USB interface.
There is a voltage regulator on board, so it can accept up to 12V DC.
The Arduino Pro Micro is a microcontroller board based on the Atmega32U4. It has 20 digital input/output pins (of which 7 can be used as PWM outputs and 12 as analog inputs), a 16 MHz crystal oscillator, a micro USB connection, an ICSP header, and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a micro USB cable to get started. It has a form factor that enables it to be easily placed on a breadboard.
The Micro board is similar to the Arduino Leonardo in that the Atmega32U4 has built-in USB communication, eliminating the need for a secondary processor. This allows the Micro to appear to a connected computer as a mouse and keyboard, in addition to a virtual (CDC) serial / COM port.
If you supply an unstable power supply board, be sure to connect to the “RAW”, not on the VCC pin. It has also added a PTC fuse and diode protection to the power circuit and to correct the RX and LED TX circuits.
Package Includes :
1 x Arduino Pro Micro