Pro Micro ATmega32U4 5V 16MHz Micro USB Development Board Module Microcontroller for Arduino (Pack of 1pcs)

Used this to make a button box for my son's Sim Rig. I used an alloy box and earthed the Pro Micro to stop any interference, I secured the USB cable inside the box as socket on the board is a bit fragile. Once programmed it works perfectly. I would definitely recommend this. Note: If you're building a button box I recommend using an alloy box and earth the board to it as there has been a lot of posts about interference. If you use a plastic box you I would line it with copper tape or use shielding paint and then earth the board.

Did exactly what it said on the tin.

This product was, in fairness, exactly what I wanted. However, things went wrong when the usb in plug was ripped off the board. This was under very little pressure (essentially just me trying to plug it in) and as such the board is unusable. However, worked well while it worked.

this board was bricked from the bag, never took any keymaps, and just didn't work, I'm in the process of returning it, and removing it has broken the components of this project

OK board but on the pricey side for what it is. You are paying for UK stock and fast delivery. - Text on the board is printed poorly and is hard to read. - Pin headers must be self-soldered, as in description. - Both 3.3v/5v marker boxes unmarked on the PCB. - 16Mhz crystal and 5v regulator installed on the board I received. - Stamped part number on 5v regulator was not discoverable on a search, proved it was 5v using multimeter. - J1 unsoldered, but should be soldered before use. If left unsoldered 5v power provided by USB will pass through the regulator circuit, resulting in < 5v to the rest of the board. Confirmed with multimeter before bridging. In all a perfectly servicable board but at the price point it would be nice if the headers were soldered and J1 was pre-bridged. Would have given this four stars if the listing made it clear J1 should be soldered as I had to waste a lot of time faffing with the meter to figure that out for sure I had a 5v board and the jumper should in fact be closed. Did come preflashed with a bootloader identifying as an Arduino Leonardo and sketches did appear to work. I did however reflash the bootloader to be sure I was using original and latest bootloader. This worked fine. If you need one of these boards on a short lead time this is a fine listing, but if you want a usable out of the box board look elsewhere.

After little use the port snapped off

Recognised on com port but wouldn’t program

It works but quality isn’t great, after only a few uses the micro USB has simply fallen off the board and I’m careful with my wires. Quite disappointed the build quality is poor.