Teyleten Robot Type-C Pro Micro Atmega32U4 5V 16MHz Module Board Micro USB Pro Micro Development Board Micro Controller 3pcs

These worked great for my project. I have used Arduino Pro Micros for a while because they're small and they work with the CorsairLightingProtocol project, which mimics a Corsair ARGB lighting controller. My previous stash of Pro Micros ran out and these were some of the most reasonably priced with USB-C. They worked great for my project. One thing to note is that the USB port seems slightly off center, but I was custom designing a 3D printed enclosure for my project so I was able to account for that no problem. I soldered these into a prototyping PCB using the included pin headers. My project was to convert an RGB PC fan into a desk fan, using the Arduino running a modified CorsairLightingProtocol as the controller. It controls two channels of ARGB lighting, the PWM output for the fan speed, and takes input from an encoder knob with button. On a second revision of my design I wanted to power the fan off the USB bus so I shorted out the polyfuse on the Arduino and closed the J1 jumper to power the microcontroller directly from the 5V USB bus power. This was a bit of a hack but it worked fine for my application and I was able to run a boost converter to get 12V power out of the 5V input with a total of around 1.2A current draw from the USB port. When doing this the first time somehow I shorted one of the yellow capacitors and had to remove it, but it was bypassed by J1 anyways so it didn't matter. I take the blame on that one. The second one I modded when making the second board I also shorted the J1 jumper and the polyfuse but did not damage the capacitor, probably just overheated it with the soldering iron or something.

Works great running QMK to drive my Ferris Sweep custom ergonomic mechanical keyboard. The QMK programmer recognized it immediately after a reset, and the included headers meant there was one less component for me to buy.

I bought this 3-pack of “Pro Micro 5V 16MHz” boards and all three arrived completely dead. No power LED. No USB detection. No serial device. Nothing. Before anyone says “firmware issue” or “bootloader missing” no. Even a blank ATmega32U4 will still power the onboard LED when 5V is present. These boards don’t even do that. They show zero electrical activity. Tested with: • Known good USB cable (works with other Pro Micro instantly) • Multiple USB ports • Multiple computers • Multimeter confirming 5V present at the cable My older Pro Micro lights up immediately using the same setup. These do not. This is not a software issue. This is not user error. These boards are electrically dead. Judging by other reviews mentioning the same behavior, this looks like a batch that never passed QA. Save yourself the time and return headache. Spend a little more on a reputable brand. Three boards, three bricks.

I purchased these in order to make an arcade spinner to work with my upright cabinet and MAME. After programming and pairing one with a rotary encoder and spinner knob (also purchased on Amazon) it worked like a charm. I would not hesitate to purchase the same items again if needed. Thoroughly satisfied.

Worked right out of the box. Loaded with a bootloader as expected. High quality.

This comes flashed with "Arduino Leonardo" boot-loader, but in fact this board is a clone of the "SparkFun Pro Micro v11, 5V", which is a bit different. So, re-flashed from Arduino IDE 2.0 with USBasp. Works fine. original: lsusb: ID 2341:8036 Arduino SA Leonardo (CDC ACM, HID) updated: lsusb: ID 1b4f:9206 SparkFun SparkFun Pro Micro

they work perfectly and can be used with so many projects. i especially like using them for midi controllers

DO NOT BUY THESE. They brick themselves after a few code uploads and don’t even work with traditional USB C to USB C cables. Took me an hour of trying to connect just to find this out the hard way. Had to use a type C to type A adapter and then a type A to type C cable just to get it to work, and now it’s completely bricked and won’t even show up on my laptop. The other reviews aren’t lying, these are a waste of money. Sucks :(