New microcontroller reference board
22 February 2026 at 4:44 pm
Throughout the years I've made several Kicad reference-designs that others can use as starting points for their own custom boards and today I've published a new one for the popular RP2350 sereies, based on the RP2354A that has 2Mb builtin Flash. If you need a custom design/board, contact me via my consultancy - Maketronics.
The new board is very minimal. It's a 2 layer board, so only 23 pins are routed out for breadboard use, along with GND, 3V3 and 1V1 (internal regulator). Two extra pins are used for an APA102, so I can test output. The BOOTSEL pin is also populated so I can test bringing the device up as a USB Mass Storage device. This button can maybe also be used as an input while the device is running? I'll find out when I get the physical boards next week.
Here's link to the files for this as well as all my other Kicad starter-files for microcontrollers:
Not much happening at the bottom of this board, but here it is as well:
