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added link to list of resellers

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Peli de Halleux
2017-03-08 05:01:11 -08:00
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docs/device.md
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# Device
### ~ hint
**Looking to buy a micro:bit?** See the [list of resellers](https://microbit.org/resellers).
### ~
All the bits and pieces that make up the BBC micro:bit
![](/static/mb/device-0.png)
### LED Screen and Status LED
The red lights are [LEDs](/device/screen) (light emitting diodes) and form a 5 x 5 LED Screen.
@ -23,19 +31,24 @@ When you have downloaded and run your code onto your micro:bit, press Button R t
### USB connection
When you plug in your micro:bit, it should appear as ``MICROBIT``.
When you plug in your micro:bit via [USB](/device/usb), it should appear as a ``MICROBIT`` drive.
If you accidentally hold down the reset button as you’re plugging in your micro:bit,
the micro:bit will appear as a MAINTENANCE drive instead of ``MICROBIT``. This is known as maintenance mode.**
the micro:bit will appear as a MAINTENANCE drive instead of ``MICROBIT``. This is known as maintenance mode.
To continue programming your micro:bit YOU MUST unplug your USB and reconnect it. Check that the drive now shows as ``MICROBIT``.
**Use with caution. If you click on the drive while it shows as ``MAINTENANCE``,
### ~ hint
Use with caution. If you click on the drive while it shows as ``MAINTENANCE``,
you can see which version of firmware you have running on your micro:bit.
Firmware on your micro:bit should be up-to-date already.
You can find the version of firmware in the 'version.txt' file on the micro:bit. Further information on the firmware can be found here:
https://developer.mbed.org/platforms/Microbit/#firmware
### ~
### Compass
The compass can detect magnetic fields such as the Earth’s magnetic field.
@ -51,14 +64,22 @@ Output is in milli-g. The device will also detect a small number of standard act
### Pins
The pins can be a form of input or output.
There are labels for the input/output pins P0, P1, P2, which you can attach external sensors to such as thermometers or moisture detectors.
You can read more about large and small pins [here](/device/pins).
The [pins](/device/pins) can be a form of electrical input or output.
There are labels for the input/output pins ``P0``, ``P1``, ``P2``, which you can attach external sensors to such as thermometers or moisture detectors.
### Light level
The screen can also be used a light level sensor (it's a really cool trick).
### Runtime
The micro:bit embodies many fundamental concepts in computer science. To learn more, read [the micro:bit - a reactive system](/device/reactive).
Sometimes, your micro:bit may display an error code. For more information, see:
* [the error codes](/device/error-codes)
### How do I connect the micro:bit to my computer?
Your micro:bit can be connected to your computer via a micro USB cable.
@ -90,4 +111,4 @@ control the micro:bit or the micro:bit can control another BLE device.
### Technical Information
The micro:bit has been designed to be a bare-board micro controller for use by children aged 11-12.
More information is available at the [BBC web site](http://www.microbit.co.uk/device).
More information is available at the [Microbit Foundation web site](https://microbit.org/device).