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Raspberry Pi 7" touch screen assembly guide

7" touch screen Raspberry Pi

Preparing your Pi

Before connecting your Pi to the screen, you should first ensure you have updated it to the latest version of Raspbian. I understand that NOOBS does not (currently) work, as when that boots it does not have the drivers required for the board.  In Raspbian, open a terminal window (if you are in Desktop mode) and issue the following commands, one after the other, waiting for the previous one to complete before going onto the next. The first two are really the only ones required, but the other three ensure that your Pi has the latest and greatest version of Raspbian. Answer ‘Y’ to any prompts:

  • sudo apt-get update
  • sudo apt-get upgrade
  • sudo apt-get dist-upgrade
  • sudo apt-get install raspberrypi-ui-mods
  • sudo apt-get install raspberrypi-net-mods

Building the Screen

Constructing the kit is easy. I strongly advise you to keep the plastic cover on the screen during construction, and keep it somewhere safe for any other time you want to fiddle with the screen, just to save scratches.

You first connect the wide ribbon cable to the underside of the display board supplied. There is a delicate clamp you need to pull out slightly before sliding the ribbon in. Be very careful - they are easy to break if you use force.

Turn the board over, and connect the small ribbon cable to the connector on the top of the board. Again, first pull the small clamp out before pushing the ribbon in.

Now fix the board to the screen with the four spacers.

Take the white ribbon cable and connect it to the connector on the board, with the blue mark on one end towards the back of the screen.

Connect the four jumper wires to the 5V, GND, SCL and SDA pins on the display driver board. Here I am using Black for ground, Purple for 5V, White for SCL and Grey for SDA.

Mount your Raspberry Pi onto the four spacers with the screws provided.  I am using a B+ here, although all models of Pi will work.  However, the original Pi B and A models (without the four mounting holes) will not screw in place, but they can still be used.  Connect the white ribbon to the Display Connector of the Pi.  Using the colours I used for the jumper wires, connect:

  • GND (Black) to the third pin down on the right hand side,
  • 5V (Purple) to the second pin down on the right,
  • SCL (White) to the third pin down on the left hand side, and
  • SDA (Grey) to the second pin down on the left hand side.

The final bit is to power the screen and Pi. You must use a good power supply that is able to supply at least 2 amps. The Pi Hut does a suitable one which you can buy here.

The power supplied to the screen will also power the Pi through the jumper wires you connected earlier.

Switch on the power, and watch your Pi boot!

You should now be able to move the mouse around using the touch screen!



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