RP2040-Zero Mini Board, Pico-Like MCU Board Based on Raspberry Pi MCU RP2040, Dual-Core Arm Cortex M0+ Processor, Onboard 2MB Flash Memory, Type-C USB Connector, Support C/C++，MicroPython

I like to tinker with Electronics and there's a tool out there to help you figure out JTAG pinouts. The idea is, you hook up a few pins that you think are JTAG (also works with SWD) and it does some stuff and tells you if it is JTAG and if so what pins are what. The tool I first saw that did this is expensive and also is no longer being made so it's even more expensive. (currently around $200)So I started researching alternatives and I found a project called BlueTag which runs on a RP2040. Now, it has one main limitation, you can't control the target voltage so if your system doesn't use 3.3v (because that's what the RP2040 runs at) then it won't work. However most JTAG systems are 3.3v. Especially for me as a hobbiest, this seems to be perfect...So I needed a RP2040. I could get the official board but that still has micro usb and was rather large. This board looked perfect. It was small, used usb-c and the i/o pins were pretty straight forward. The only thing I wish was that GND was on the side with the digital I/O pins but other than that, this seemed perfect.So I ordered one and it was perfect. Soldered some header pins, made a cable and it seems to work great for my use case.I imagine whatever you need a RP2040 for, this will work well and is nice and small. The only thing that might be an issue is if you need more pins, then you might need to look at a larger board.

Beat little microcontroller i ever used!!

This worked well

''It’s-a Me, Mario!''

First off you can't put it on a breadboard because the header pins soldered on the bottom which was the whole reason I got this version. I also ordered the non header version for the final project. The second one immediately surged my USB port on my computer when I plugged it in. So basically both are useless to me. Wouldn't recommend.

Perfecto para switch.