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Description
Arduino Pro Micro - 5V-16MHzsku: DEV 10998 Here at SparkFun, we refuse to leave 'good enough' alone. That's why we're adding to our line up of Arduino compatible microcontrollers once more! 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: 4
sku: DEV-10998
Here at SparkFun, we refuse to leave 'good enough' alone. That's why we're adding to our line-up of Arduino-compatible microcontrollers once more! 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: 4 channels of 10-bit ADC, 5 PWM pins, 12 DIOs as well as hardware serial connections Rx and Tx. Running at 16MHz and 5V, this board will remind you a lot of your other favorite Arduino-compatible boards but this little guy can go just about anywhere.
Note: There are two minor errors on this board which shouldn't effect your overall project to any great degree but are helpful to know about. Digital Pin 14 is mis-labeled as Pin 17 on the silkscreen. Also, the Tx and Rx LEDs are pulled to ground instead of VCC.
Note: This board uses what's known as the "diskloader" bootloader, this is presumably the same bootloader used by the Arduino Leonardo. This bootloader is still in its infancy so expect some glitchiness here and there. Also, because it works over HID you will need to install some drivers so that your computer will recognize it. A "readme" file in the driver pack below explains how to do this.
Features
- ATMega 32U4 running at 5V/16MHz
- Supported under Arduino IDE v1.0 (un-comment "leonardo" lines in boards.txt)
- On-Board micro-USB connector for programming
- 4 x 10-bit ADC pins
- 12 x Digital I/Os (5 are PWM capable)
- Rx and Tx Hardware Serial Connections
- Our Smallest Arduino-Compatible Board Yet!
Documents
- Schematic
- Eagle Files
- Getting Started Tutorial
- Datasheet (ATMega 32U4)
- Pro Micro Drivers
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4.4 ★★★★★
Based on 116 reviews
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Product Reviews
★★★★★ 5
Good case
Color: Black
Great watch case. Fits all my 43mm-48mm watches. Any bigger they will run against each other. But altogether a solid purchase.
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Reviewed in the United States on May 5, 2026
★★★★★ 5
Men’s Watch Box w/24 Slot Display
Color: AllBlack, Color: AllBlack
This mens watch box looks amazing, and nicely fits 24 watches without worrying about damage to the other watches. Each slot has its own location, and not need to worry about the watches rubbing up against each other.
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Reviewed in the United States on May 11, 2026
★★★★★ 4
Nice case
Color: Dark Brown, Color: Dark Brown
Very nice case. Good presentation. Only issue is if watch is over 52mm they can make it a tight fit.
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Reviewed in the United States on May 6, 2026
★★★★★ 5
Nice Case with clear top for 24 Watches
Color: Black
This is my second watch case and I am very happy with it. I like the glass so you can view the watches from the top. This one has a flip up latch which I also like because you can reach down and open the case with one hand. The pillows are a good size, not too big so they do not stretch out your watch bands. I specifically wanted a case to hold as many watches as possible and 24 is about the biggest I could find in this configuration, meaning a box and not some kind of cabinet which I do not have room for
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Reviewed in the United States on March 29, 2026
★★★★★ 1
Not good quality
Color: Black
No the quality is was expecting for the price just card board construction and plastic
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Reviewed in the United States on May 21, 2026