Assembly Instructions for 2x9 connector


The 2x9 connector is supported by TWILCD 40x2/40x4/RGB ONLY. It is used exclusively by 40x4 character displays.


The display should be connected as follows:

Please see the compatibility page for an overview of supported displays.


To assemble this kit, you will need:

  • A soldering iron
  • Solder
  • A wire cutter (a diagonal type that allows you to cut the wires as close to the soldering points as possible is best)
  • Helping hands or clips to hold the PCB in place when soldering (a vise will also work)


  • A multimeter
  • Desoldering wick
  • Solder sucker
  • Protective glasses

See the equipment page for more details.

Step 1

Attach a header to the display as follows:

You will need a 2x9 male header strip.

The long part of the legs should point out and the short part should go into the holes to be soldered in place.

Step 2

Insert the board to the back of the display like so:

Solder the pins in place.

Step 3

Finishing touches: The pins from the header that attaches the display to the TWILCD board stick out a bit. You may want to clip them off (close to the solder point) before using the display. When doing this step hold your hand over each pin as you clip it and use eye protection as small pieces of metal may fly out at very high velocity.

Congratulations, you have now assembled the TWILCD display. Head over to the Usage page for further instructions.