Collecting information on alternative displays - please contribute

[travnar]

Hello I have this BW screen and I have made some modifications to it and it runs on 5v. I have made a drawing in paint of my wiring

Please correct me if my wiring is wrong or if there is a better alternative, I just tried this.

[spoiler="Pictures"]

[/spoiler]

Hey there, will this board work the same as the image above, so that I can use your diagram with it?

IMG_0944.JPG (2.13 MiB) Viewed 10053 times

Thanks

[PND]

Hello I have this BW screen and I have made some modifications to it and it runs on 5v. I have made a drawing in paint of my wiring

Please correct me if my wiring is wrong or if there is a better alternative, I just tried this.

[spoiler="Pictures"]

[/spoiler]

Hey there, will this board work the same as the image above, so that I can use your diagram with it?
[spoiler="Picture of travnar"][/spoiler]
Thanks

'

I 'm not 100% sure but I think so. If you compare the pictures the boards are exactly the same, except for the color. If you want you can try it. If you do i recommend to try it first with hot glue before you intend to solder it. And please note that I am not responsible for any damages that you make. Good luck !

[solder]

Why wiring 5V and 3V3

[jev]

Why wiring 5V and 3V3

That's clever. I think it's because pi zero has both 5v and 3v3 outputs. You can technically bypass all the voltage regulation circuitry on the display board. Maybe save few mAs?

[travnar]

I 'm not 100% sure but I think so. If you compare the pictures the boards are exactly the same, except for the color. If you want you can try it. If you do i recommend to try it first with hot glue before you intend to solder it. And please note that I am not responsible for any damages that you make. Good luck !

Yeah, that's what i figured. They look completely identical but the color. Now, what are the exact modifications you made the board? The diagram shows you pretty much keeping it intact; did you not remove any of the chips like the guide?

[oooohan]

[mention]Robvp[/mention] and [mention]oooohan[/mention]
Thanks, but could you please post the dimensions, too? As listed in the wiki.
There should be every information that is needed.

[mention]Fleder[/mention]: I went ahead and took the screen apart. The screen dimensions match the other BW displays:

- case: 76mm x 64mm
- active area: 70mm x 53mm

I would classify this as "avoid if possible" due to the board's size.

[PND]

I 'm not 100% sure but I think so. If you compare the pictures the boards are exactly the same, except for the color. If you want you can try it. If you do i recommend to try it first with hot glue before you intend to solder it. And please note that I am not responsible for any damages that you make. Good luck !

Yeah, that's what i figured. They look completely identical but the color. Now, what are the exact modifications you made the board? The diagram shows you pretty much keeping it intact; did you not remove any of the chips like the guide?

I didn't make any modifications on the board. I only have changed the wiring like in the picture i made. The orange wire that i used in the picture is just a wire that I took from a UTP cable (It can be any color).

Why wiring 5V and 3V3

That's clever. I think it's because pi zero has both 5v and 3v3 outputs. You can technically bypass all the voltage regulation circuitry on the display board. Maybe save few mAs?

Haha to be honest I have no idea, I do not know much about this . I found this idea of wiring on the original Raspberry Pi forum. The OP of the post on that forum gives a short explanation why he did this. So thanks and credits to "MauroG" haha

[spoiler="Original Post"][/spoiler]

[jev]

Interesting. So we don't have to connect the white wire at all because on Pi Zero it is the same as ground? According to wikipedia white and red wires mean left and right audio channels.

[scbailey94]

Hi, Igot this screen from Amazon.co.uk and was wondering if anyone could tell me what wires I connect up to my pi zero? I feel like a bit of a noob with this so if anyone could draw a quick diagram or something it would really help According to the wiki I have variant 7 of the BW screen so it should work on 5V unmodded. Thanks

[fcn]

Hey guys!

Got a BW display on amazon.com from a seller called GoodWill Sky. Shipped from Hong Kong, $15.98 with free worldwide delivery. The motherboard is not like any other I've seen here. Also, it doesn't work with 5V so I had to modify it (red wire from 5V to a 3rd pin on AMS1117 chip).

The display is based on AMT630 Video Display Controller from ARKMICRO (http://www.datasheetspdf.com/PDF/AMT630/840049/9).
It has AMS1117 12v -> 3.3v (3 pin) voltage regulator to run all the logic (http://www.advanced-monolithic.com/pdf/ds1117.pdf).

Be careful not to remove a 8 pin chip there, it's a flash memory chip (marked Pm25LD512) presumably for built in graphics. It's the only 8 pin chip on that board so that's a distinguishing feature.

Also, the case didn't have any screws, instead holding together on plastic clips. The control board is on a separate PCB.

Hope that helps!

I'm just asking for clarification. Does this mean the actual control chip run on 3.3V? Why not completely bypass 5V and feed it 3.3V on the right point? Wouldn't this save some amps? I am not really knowledgeable in electronics, I'm just asking to learn.