Adafruit DC Power BFF Add-On for QT Py

Product ID: 5882
Qty Discount
1-9 $7.95
10-99 $7.16
100+ $6.36


We were recently working on a project where we really wanted to power a QT Py ESP32 from 12V - but the only power input on the board is basically USB 5V max. Never one to give up, we designed an add-on that will allow anyone to use a QT Py or Xiao dev board with up to 20V DC power!

In the center is an MPM3610 integrated buck converter, which will generate 5V from up to 20V input, with cool DC/DC technology so there's no heat-sink needed. The MPM3610 can give about 1 Amp output, which should be plenty even if you have LEDs, WiFi connectivity, displays or even a small motor or servo.

The board features both 3.5mm terminal block and 2.1mm DC jack inputs, protected with a Schottky diode. You can use either to power the board, but don't plug in different power inputs to both - they're wired directly together on the BFF. If you're using the DC jack to power, you can use the terminal block as an 'pass through output' to connect other high-voltage devices.

There's two small enable and an ground solderable pads next to the terminal block so you can use an external switch to disable the converter. 

Since its a bulky add-on with through hole components, compared to most of our other BFF boards, we think it's best to use socket header to plug a QT Py on top, rather than trying to have it solder back-to-back. For that reason we include two 7-pin socket headers. Solder them so that the QT Py sits on the top, there's two break-apart railings that can be used to bolt the board since plugging in a jack requires  mechanical stabilization.

Technical Details

Product Dimensions: 30.4mm x 26.6mm x 12.6mm / 1.2" x 1.0" x 0.5"

Product Weight: 4.9g / 0.2oz

RoHS 2 2011 65 EU Compliant
RoHS 2 2015 863 EU Compliant


The most powerful BFF of them all

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