Some of the Columns appear on the edge connector, so if you want to use extra GPIO pins, you have to disable the display in software.
CROCODILE CLIPS CIRCUIT SOFTWARE
This software also uses the LED Row and Col pins to implement the light sensing feature, as such you may see a difference in sensitivity between board revisions. The LED matrix is driven via a high-speed multiplex generated by application processor software. Row 2 Col 8, and Row 2 Col 9 are not used. On the V2 board this is implemented as a 5x5 matrix, but in the V1, this is implemented as a scanned matrix of 9x3 (i.e. The LED matrix is physically laid out as a 5x5. Schematicsīelow is the pinmap and allocation of the nRF52833, more information is available on the micro:bit V2 schematic GPIO on nRF52833īelow, we’ve extracted some useful details about the hardware that anyone implementing software for the micro:bit, interfacing to it, or designing an add-on board for it should find useful.
![crocodile clips circuit crocodile clips circuit](https://www.rupert.id.au/tutorials/crocodile/crocodile1.gif)
If you’re looking to make something of your own based on the micro:bit, you might prefer to use our ‘Reference Design’ which is based on a radio module and has space on the layout for you to add your own components. The micro:bit V2 schematic is available from the Micro:bit Educational Foundation microbit-v2-hardware repository. The micro:bit V1.3 and V1.5 schematic is available from the BBC’s micro:bit hardware repository.
![crocodile clips circuit crocodile clips circuit](https://www.muellerelectric.com/images/products/232/BU-34X.jpg)
This page discusses the micro:bit schematic and Bill of Materials BOM, which shows the electrical connections of the micro:bit and the components used in it.