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I have recently purchased a small LCD screen to use with my Raspberry Pi, as shown below.

Front of the screen Back Of the screen

I tried attaching it to 16 of the GPIO headers, connected to its 16 (usable) pins. I found this forum post, and (using the pinout provided) tried to get the display working. I switched several of the connections on and off trying grid-references from the pinout and just some random combinations... and there was no apparently pattern to the results.

I have no previous experience of LCDs, and cannot find any help at all for this particular screen. Is there a way I can control the screen directly from the Pi, or do I need some sort of IC or driver thingy in the middle? Please explain how this screen could work and tell me what I need to do to get it to do that. If I need to buy anything then provide a link, as I have nothing but this screen, some resistors, and a bunch of LEDs (alongside with the Pi of cause).

Screen part no:

DGL-0401YG-4EH
BLG0126-01
  • 1
    This device is not that simple (see for example: electronics.stackexchange.com/q/96063/1729) , requires toggling the pins continuously in a specific sequence to display anything. In any case, if you are new to this, using an unknown surplus LCD without a datasheet is a guarantee for a bad time. IMO best to find an LCD with a datasheet, or even better one designed for the raspberry pi to experiment with. Unless you have a particular need to use this exact LCD its going to just be a giant time sink with little reward in my experience – crasic Nov 4 '17 at 2:58
  • @crasic There is some info in the forum post I linked to, but I don't know if it is enough for me to be able to run the screen. It includes a pinout, but I don't know what the sequence is that I have to toggle the pins in. Scroll down to the 2-4 LCD with pins section to see this. – AlphaMycelium Nov 4 '17 at 7:04
  • @crasic That link you provided is the same screen!!! After looking at that, I think I need to buy one of these microchips, correct? – AlphaMycelium Nov 4 '17 at 7:58
  • a PIC is just another type of 8-bit microcontroller like the ATMEGA chip on the arduino platform. It is useful only because that particular type has a LCD Driver Built In to. I chose that link because they discuss your partcular LCD, which is not a standard part so the only way to find information on it is random posts with peoples findings, rather than a real datasheet that would actually help you interface it. – crasic Nov 4 '17 at 15:42

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