2026-06-13 (Sa) SubdermalDuino nRF52840 and MDBT50Q-1MV2 research

I considered the size of the MDBT50Q-1MV2 and the demo board and decided to build a rig for initial programming of the smaller module. I imagined a 3D-printed jig to hold the board and a few pogo pins, in a mated pair that would slide together and let me connect via USB. The circuit might be as simple as a connector for a USB↔serial adapter. I also checked whether there was a commercial version. I instead turned to Adafruit's documentation and found the open-source files for the MDBT50Q-1MV2 Feather. I figured I could identify the necessary pins and determine their physical locations to build my programming board. I had to install an old version of Eagle to read the board files, and I eventually found the pin dimensions in a data sheet. I will isolate the necessary pins, order the supporting components, and model a testing jig.
Adafruit Feather with an nRF52840

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2026-06-10

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