Keyestudio Micro:bit Mini Smart Robot Car - 7 Micro:bit Pins

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7. micro:bit Pins
Before getting started with the following projects, first need to figure out each pin of micro:bit main board.
The BBC micro:bit has 25 external connections on the edge connector of the board, which we refer to as ‘pins’.
The edge connector is the gray area on the right side of the figure below.
There are five large pins, that are also connected to holes in the board labeled: 0, 1, 2, 3V, and GND.
And along the same edge, there are 20 small pins that you can use when plugging the BBC micro:bit into an
edge connector.
Please refer to the reference diagram shown below.