Collecting information on alternative displays - please contribute

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brigghius
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Re: Collecting information on alternative displays - please contribute

Post by brigghius » Mon Feb 19, 2018 3:23 am

hi all, i have a new screen:
Image

it is like this:
https://www.sudomod.com/wiki/index.php? ... umper.jpgù

but I'm not sure what to do.

help pls :)

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Wailer
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Re: Collecting information on alternative displays - please contribute

Post by Wailer » Tue Feb 20, 2018 12:30 am

Jaspermcwolffe wrote:
Sun Dec 31, 2017 3:40 pm
Has anyone tried the Crystalfontz CFAF320480C4-035T? It says it runs off 3v. I know next to nothing about any of this. Just wanted to see if it was worth the try.
This screen works with the pi, take a look over here https://github.com/CrackberryPi/hardwar ... /README.md
The width of the screen is slightly wider than what the gameboy case could accommodate, it has roughly the same dimensions as a pi2/pi3 board so you will have to take some material of the case to make it fit.
I think the price online is quite high...

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Wailer
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Re: Collecting information on alternative displays - please contribute

Post by Wailer » Tue Feb 20, 2018 1:06 am

hi all, i have a new screen:
Image

it is like this:
https://www.sudomod.com/wiki/index.php? ... umper.jpgù

but I'm not sure what to do.

help pls :)
Can't read what type of voltage regulator is used (in the red circle).
20180220_085753.jpg
20180220_085753.jpg (195.05 KiB) Viewed 6411 times
Have you tried running it at 5v?
Just connect it (with the attached wires) to 5v and feed a composite display signal (otherwise the screen does not turn on, could be a video/photo camera, or a raspberry ;) ).

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brigghius
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Re: Collecting information on alternative displays - please contribute

Post by brigghius » Wed Feb 21, 2018 8:05 am

photo_2018-02-21_16-04-06.jpg
photo_2018-02-21_16-04-06.jpg (166.78 KiB) Viewed 6393 times
photo_2018-02-21_16-04-04.jpg
photo_2018-02-21_16-04-04.jpg (7.33 KiB) Viewed 6393 times
is it ok?

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Wailer
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Re: Collecting information on alternative displays - please contribute

Post by Wailer » Wed Feb 21, 2018 4:07 pm

brigghius wrote:
Wed Feb 21, 2018 8:05 am
photo_2018-02-21_16-04-06.jpg
photo_2018-02-21_16-04-04.jpg
is it ok?
According to the datasheet this regulator has an operating range from 4.75 up to 27 volt, so it should work on 5 volts without any modifications.
Here is a link to the datasheet: https://files.acrobat.com/a/preview/2e ... f52ada491d
I don't know what kind of psu (adafruit/bangood) you will be using but as long as it can provide enough juice (so no voltage drop when under load, say below the needed minimum of 4.75) all should be fine.
Just feed it 5v (on the wires not the chip 😉) and a composite signal to see if it works.

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Wailer
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Re: Collecting information on alternative displays - please contribute

Post by Wailer » Thu Feb 22, 2018 3:39 am

brigghius wrote:
Wed Feb 21, 2018 8:05 am
photo_2018-02-21_16-04-06.jpg
photo_2018-02-21_16-04-04.jpg
is it ok?
Screenshot_20180222-112728.png
Screenshot_20180222-112728.png (376.83 KiB) Viewed 6368 times
If supplying 5v does not work, you should suply it to pin 3 (see screenshot) i believe this is the regulators 5v output.
Please mind the little dot on the chip to get the correct pin.
Maybe can someone confirm my interpretation of the datasheet is correct!
Brigghius, if you have a voltmeter you can measure if (when supplying the standard 12v) that this pin delivers 5v.

chris
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Re: Collecting information on alternative displays - please contribute

Post by chris » Mon Mar 05, 2018 7:43 pm

Wailer wrote:
Thu Feb 15, 2018 11:06 am
Bought on ebay
Board found in the screen wiki (variant 7), but this one works at 5v without any modifications (even as low as 4,5v).
It looks like they have changed the voltage regulator to XL1509 datasheet: https://files.acrobat.com/a/preview/d9f ... a2f9aa70b
You could still remove it to make it more power efficient (regulator is 82% at 5v), and feed it system 5v through pin 2 on the chip but imho this is not worth the effort.
20180215_173856.jpg
https://rover.ebay.com/rover/0/0/0?mpr ... 2241298189

One quick adition,

The screen is held by one little clamp, so removal is extremely easy!
No glue, no prying with screwdrivers, just remove one screw an it pops right out!
Damn, I wish I had known this. I just got two variant sevens and did the mod that runs the wire from the chip to the 5V pad. (method 1 i think).

Welp, the second one I won't mod. TY for the information!

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Wailer
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Re: Collecting information on alternative displays - please contribute

Post by Wailer » Tue Mar 06, 2018 3:00 pm

chris wrote:
Mon Mar 05, 2018 7:43 pm
Wailer wrote:
Thu Feb 15, 2018 11:06 am
Bought on ebay
Board found in the screen wiki (variant 7), but this one works at 5v without any modifications (even as low as 4,5v).
It looks like they have changed the voltage regulator to XL1509 datasheet: https://files.acrobat.com/a/preview/d9f ... a2f9aa70b
You could still remove it to make it more power efficient (regulator is 82% at 5v), and feed it system 5v through pin 2 on the chip but imho this is not worth the effort.
20180215_173856.jpg
https://rover.ebay.com/rover/0/0/0?mpr ... 2241298189

One quick adition,

The screen is held by one little clamp, so removal is extremely easy!
No glue, no prying with screwdrivers, just remove one screw an it pops right out!
Damn, I wish I had known this. I just got two variant sevens and did the mod that runs the wire from the chip to the 5V pad. (method 1 i think).

Welp, the second one I won't mod. TY for the information!
You're welcome!
Maybe the first rule in the screen wiki should be to "try to run a screen on 5v"
And if that doesn't work, mod it.
(Maybe this already is the rule :oops:)

But hey if we could find everything in there, we wouldn't have this great forum :D

Daily
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Re: Collecting information on alternative displays - please contribute

Post by Daily » Sun Mar 11, 2018 2:59 pm

Image

Just got this board from EPATHDEALS through amazon. Runs fine on 5v, but I get this weird flicker at the top. I want to do a 5v mod, but none of the boards look exactly like this one on the wiki. Any help would be great! Thank!

landstalker10
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Re: Collecting information on alternative displays - please contribute

Post by landstalker10 » Wed Mar 21, 2018 3:43 pm

Alright I am just getting started. I built a NES PC about a decade ago and I have not done a project since. Life happens.

So I am looking into the video and I noticed the following item and I am curious if anyone else has looked into it.

Up front I am concerned about dimensions, but for less than 20 I may just buy one and see where I stand.
This is a link on Newegg.

https://www.neweggbusiness.com/Product/ ... lsrc=aw.ds

I started looking into this after seeing a similar incomplete(but working) concept on Adafruits site. Agreeable I have not looked into the power situation or anything the like. Up front if the dimensions work out, and this does indeed allow me to reduce the number of cars; then I will work out the power concerns.

Let me know what you think all positive and negative(those that allow forward thinking) feedback would be appreciated.

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