Configuring 12864 LCD on Maestro?

pixelpieper · 28 Feb 2019, 11:55

@puterpro My contrast improved significantly once I ran the Maestro board of 24V rather than USB. Seems to be an issue with the supply...

PuterPro · 28 Feb 2019, 13:07

@pixelpieper Thanks, that makes some sense as they do tend to be voltage sensitive, as anyone with YOUR screen name should know. LOL!

My old setup was running 13.2v, new is an ATX @ 12.2v.

I'm running without a display currently as I have a PC right next to it, it's on my list to handle but low priority right now. I'll get back to it and if it's too naughty I'll get a cheap one from China ...

24v is on my Wish List but the ~~Wife~~ Finance Committee is currently recovering from shock from all the upgrades right now.

dc42 · 28 Feb 2019, 14:20

If you have the on-board 5V regulator enabled, then the contrast on the 12864 display can be expected to change when you switch from USB power to VIN power (or provide both - the VIN power will take over). This is because the 5V rail is only about 4.6V when powered from USB alone, but a true 5V when powered from VIN. However, increasing VIN from 12V to 24V shouldn't make any difference to the contrast.

There are two places where the contrast pot may be:

Mounted on the back of the LCD PCB (the green one), so the red PCB gets in the way of adjusting it. If you orient the unit so that you are looking into the SD card socket opening with the LCD on the underside, the pot is slightly behind and to the left of the back left corner of the SD card socket. Some of these display/encoder combos have a hole close to one corner of the SD card socket, to provide access to the pot.
Mounted near the bottom left corner on the front of the red PCB. Most of the current listings on Amazon and eBay show it in this position.

3ddevil · 30 Sept 2019, 18:50

I know this is an old topic but in case people are searching and relying on the information I tried to reconcile the different common styles with pictures of the LCD itself and cable, so it is easier to identify which ones you need. See the pictures in this post:

Bottom line, if you don't know it's simple: if the LCD doesn't power on, flip one end of your LCD cables, cutting the keying feature if it's in the way.

abstraktlighting · 24 Nov 2019, 18:24

Whew . So I think I got it. I just want to clarify before i chop an end off my ribbon cable.
Q: I CAN USE THE ORIGINAL 10 PIN RIBBON CABLE TO DO WHATS
NEEDED TO BE FULLY FUNCTIONAL WHEN INSTALLING DUET WIFI
INTO ENDER 3 BY FOLLOWING THE DIAGRAM ON PIXELPIEPERS
2/4/2019 POST ABOVE?
A: YES or NO?

Thanks to all of you I'm brand new and just want to finally get to print some stuff.

Veti · 24 Nov 2019, 18:43

@abstraktlighting said in Configuring 12864 LCD on Maestro?:

DUET WIFI

no the duet wifi is not supported

abstraktlighting · 24 Nov 2019, 19:22

This post is deleted!

oliof · 26 Nov 2019, 15:19

By the way: no need to cut off anything, usually you can carefully lift the black plastic receptacle for the ribbon cable on the LCD and put it back on turned 180°.

4lathe · 27 Dec 2019, 22:57

I don't want to beat a dead horse but is there any way to use the 12864 lcd with a duet wifi? If not what about the tft28? Thx

4lathe · 27 Dec 2019, 23:06

Never mind the first question. Seems like thats still impossible without building hardware. But any thoughts on a tft28?