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Pro Micro is similar to Pro Mini Arduino compatible board, main difference is that Pro Micro uses ATmega32u4 with builtin USB connectivity. Sparkfun DEV – 12587
|Number of digital pins||12|
|Number of PWM channels||5|
|Ilość wejść analogowych||9|
|Logic voltage||3,3 V|
|Supply voltage min||3,3 V|
|Supply voltages max||12 V|
The 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 on-board and do away with bulky external USB interface.
This tiny little board does all of the neat-o Arduino tricks that you're familiar with: 9 channels of 10-bit ADC, 5 PWM pins, 12 DIOs as well as hardware serial connections Rx and Tx. Running at 8MHz and 3.3V, this board will remind you a lot of your other favorite Arduino-compatible boards but this little guy can go just about anywhere. There is a voltage regulator on board so it can accept voltage up to 12VDC. If you're supplying unregulated power to the board, be sure to connect to the "RAW" pin on not VCC.