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The wire has to be soldered to the 20×4 rows display like this… In order that nothing can go wrong i indicate all colors. Pin1 black and ground, Pin2 red, Pin3 grey, Pin4 green-brown, Pin5 blue, Pin6 brown, Pin7 yellow-brown, Pin8 green, Pin9 yellow-white, Pin10 pink, Pin11 grey-brown, Pin12 purple, Pin13 green-white, Pin14 yellow, Pin15 blue-red, Pin16 white. That’s it! Here is the pinout of the other side of the display. And here is a picture of the finished display … Continue reading 20×4 LCD display DIY guide