
SparkFun Pro Micro clone. Get 3 for 1 SparkFun board. Note: PROGRAM LIKE LEONARDO. I looked at the reviews and some users had trouble uploading the sketches. I chose the Arduino Leonardo as the board and was able to upload without any problems. There are 3 LEDs, one for power and one each for RX and TX. VCC output 4.5V when powered by USB. Silkscreen is also stuffed fairly densely, but legible. Three boards came in a box, each in its own anti-static bag with 3 rows of pins. Bonus points for the packaging. It also came with a pinout on a small card. (see attached picture). I also uploaded an image comparing the size to Nano, Uno and ATtiny85 (8 pin DIP). The Nano is 44mm long and the Pro Micro is 34mm.

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