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PCB files for the Adafruit Terminal Block BFF Add-On for QT Py and Xiao.
Format is EagleCAD schematic and board layout
Our QT Py boards are a great way to make very small microcontroller projects that pack a ton of power - and now we have a way for you to make wiring up sensors and batteries to QT Py boards even easier! The Adafruit Terminal Block BFF Add-On for QT Py and Xiao allows you to plug in your favvy QT Py or Xiao board and get screw-terminal blocks on each pin, plus a socket pin you can plug a wire into, as well as an extra Stemma QT port (in case your board doesn't have one) and Lipoly battery usage plus charging. Whew, it's everything you need to prototype your portable QT Py projects!
We call our like of QT Py / Xiao accessories BFF - a "Best Friend Forever". When you were a kid, you may have learned about the "buddy" system; well, this product is kinda like that! A board that will watch your QT Py's back and give it more capabilities.
Unlike most BFF's, this one has sockets for a QT Py to plug right into. If your board has headers already soldered on, you can plug and play. If not, either solder pin headers on, or use press-fit / solderless headers.
Also, no pins are 'used' by this BFF, so you can stack this with other BFFs if desired.
- 0.1" / 2.54mm pitch terminal blocks on every pin
- Double-wide socket header so you have a socket pin free on every pin for plugging in wires
- Four mounting tabs, they can be broken off if not needed
- Stemma QT / Qwiic (JST SH) connector on 3V / GND / SDA / SCL for connecting any of hundreds of displays, sensors, etc. No pullups are included on the BFF - but most boards have their own.
- 3.7V/4.2V LiPoly battery support with charging through the USB port. Will auto-switch to USB power when plugged in, and charge the battery with extra power. Charge rate of 250mA, can be adjusted to 500mA by soldering a back jumper
- Lipoly battery charging can also be disabled (cut back jumper) so you can use non-rechargeable batteries like AA's in a battery pack with JST PH connector.
No code required to use, so it works with any and all QT Py / Xiao boards!
Adafruit invests time and resources providing this open source design, please support Adafruit and open-source hardware by purchasing products from Adafruit!
Designed by Limor Fried/Ladyada for Adafruit Industries.
Creative Commons Attribution/Share-Alike, all text above must be included in any redistribution. See license.txt for additional details.