Adafruit
Terminal Block BFF Add-On for QT Py and Xiao
· MPN: ADA6495
This BFF add-on makes it much easier to wire up small QT Py and Xiao projects without juggling loose jumpers. Plug in a compatible board and each pin is brou...
This BFF add-on makes it much easier to wire up small QT Py and Xiao projects without juggling loose jumpers. Plug in a compatible board and each pin is brought out to a screw-terminal block, with an extra socket pin available for quick wire connections.
It also adds a Stemma QT / Qwiic connector on the I2C pins for connecting compatible sensors, displays and other modules. The connector is wired to 3V, GND, SDA and SCL; no pull-ups are included on the BFF, as most boards provide their own.
For portable builds, the board supports 3.7V/4.2V LiPoly batteries with charging via the USB port. It automatically switches to USB power when plugged in, can charge at 250mA by default, and can be adjusted to 500mA with a solder jumper.
No pins are used by this BFF, so it can be stacked with other BFF boards if desired. No code is required, making it suitable for any QT Py or Xiao board.
Features:
- Terminal blocks: 0.1" / 2.54mm pitch terminal blocks on every pin.
- Socket access: Double-wide socket header so you have a socket pin free on every pin for plugging in wires.
- Mounting: Four mounting tabs, they can be broken off if not needed.
- Stemma QT / Qwiic: JST SH connector on 3V / GND / SDA / SCL for connecting compatible displays, sensors and more.
- Pull-ups: No pullups are included on the BFF, but most boards have their own.
- LiPoly support: 3.7V/4.2V LiPoly battery support with charging through the USB port.
- Power switching: Will auto-switch to USB power when plugged in, and charge the battery with extra power.
- Charge rate: Charge rate of 250mA, can be adjusted to 500mA by soldering a back jumper.
- Charging disable: LiPoly battery charging can also be disabled by cutting a back jumper.
- Non-rechargeable batteries: Can be used with non-rechargeable batteries like AAs in a battery pack with JST PH connector when charging is disabled.
- No code required: Works with any and all QT Py / Xiao boards.
- Stackable: No pins are used by this BFF, so you can stack it with other BFFs if desired.
Specifications:
- Product Dimensions: 43.2mm x 30.3mm x 10.7mm / 1.7" x 1.2" x 0.4"
- Product Weight: 8.5g / 0.3oz
A handy prototyping companion for portable QT Py and Xiao projects that need screw terminals, I2C expansion and battery power in one add-on.
Jargon buster
Plain-language definitions for the technical terms used above.
- 5G
- A mobile network standard used for high-speed wireless data links. If a project uses a 5G gateway, its power system must be able to supply enough current reliably for outdoor or remote operation.
- I2C
- I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
- JST PH
- A small keyed plug-and-socket connector with 2 mm pin spacing, often used for low-power electronics connections. You need the correct JST PH cable, and its current rating limits how much power should be passed through it.
- Qwiic
- Qwiic is a plug-in connector system for I2C devices that uses small 4-pin cables, so you can connect compatible sensors without soldering. It matters because your controller or adapter also needs Qwiic, or you will need a cable or breakout to wire it up.
- solder jumper
- A solder jumper is a small pair or group of pads on a circuit board that can be bridged or cut with solder to change a hardware setting. It matters because changing modes may require careful soldering rather than just changing software.
- STEMMA
- A plug-and-cable connection system used on some maker electronics boards to make wiring simpler. If a product uses STEMMA, you need the matching cable or connector type to plug it in without soldering.
- STEMMA QT
- A small plug-in connector system for I2C boards that lets you connect compatible sensors and controllers without soldering. It matters because it can make wiring faster and less error-prone, especially when adding several small modules to a project.
- Terminal block
- A connector used to join wires together in a neat, removable, or serviceable way. For this product, it helps split one power input into several outputs without soldering.
- UPS
- An uninterruptible power supply is a battery-backed power system that keeps a device running when external power is unplugged or fails. For an embedded computer, it helps prevent sudden shutdowns that can corrupt files or interrupt a project.
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Prototyping & Wiring
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