Breakout-Boards

Introduction

This is my collection of various breakout boards that do one or more of the following:

• expose a removable MCU board's pins for headers or soldering
• make edge-pinned boards like Adafruit's ItsyBitsy adaptable to a protoboard
• add an I2C Qwiic/STEMMA QT port
• expose debug pins SWDIO and SWCLK (SAMD21/M0) and the option for a Segger J-Link connector.

Directory Contents

Board directories typically contain the following:

• Eagle PCB .brd (board) and .sch (schematic) files.
• all Gerber files for manufacturing in a zip file
• The schematic rendered as png.
• Renderings of the board, top and bottom, and maybe a photo of a populated board.

ItsyBitsy 32u4 3 & 5V MCUs

• exposes unique pins in (2) 0.3" 16-pin headers so that they can be plugged into a protoboard
• Qwiic version adds a SMD pad for a 4-cond JST SH Qwiic/STEMMA QT connector and a cut/solder pad for selecting 3 or 5V Qwiic Vcc.
• The IB Qwiic board have been fabricated so I can soon mark it as Validated.
• IB Qwiic README
• IB Basic README
• To Do:

Feather MCU w/ J-Link & Qwiic

Long Form Factor

• Fabricated and tested to some degree for different projects.

Wide Form Factor

• Remixed from a long form factor to a wide one.
• Fabricated and tested.

Qt Py Breakout w/ J-Link

• This board provides access to all Qt Py and J-Link signals, including the SWDebug pads underneath the Qt Py board.
• Fab pending.

Adapter Boards

Cirque Trackpoint FFC-12 to QT Py Adapter Board

The Cirque Trackpoint (e.g., model TM035035) is a circular capacitive touch sensor module available in different diameters supporting SPI and I2C MCU interfacing. In this instance, the board has solder pads for an Adafruit QT Py SAMD21 M0+ (#4600).