Video/Visual Guide - Brightness Control for LQ035NC111

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X..
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Video/Visual Guide - Brightness Control for LQ035NC111

Post by X.. » Sun Mar 03, 2019 12:28 am

Hi all,
this is my first post and also guide, and I want to show how I managed to add a brightness adjustment to the LQ035NC111 screen that is fairly common among GBZ builders.

I found out that one of my screens had the smaller FPC ribbon part broken, and the small 2 wire part of the ribbon is for powering the LCD backlight. So to repair my broken screen i tore it down pretty much as far as you can go with the screen; but from this I experimented with the screen since I thought it was borked.

[youtube]https://www.youtube.com/watch?v=BSTuSFl ... e=youtu.be[/youtube]


What you'll need:
-Soldering Iron (Duh)
-Potentiometer of choice, Im using a 10K pot
Image

Steps:
1. Remove the kapton tape that covers the 2 leads on the FPC connector
2. Desolder, with low heat, the positive lead. they are labeled on the FPC
Image

3. Solder a positive wire from the FPC to Potentiometer (input)
Solder a positive wire from Potentiometer to the backlight connector (output)
Solder a ground wire from Potentiometer to FPC connector
Image

now you should be able to roll the Potentiometer wheel to control the voltage coming into the screen.
currently working on a video that will hopefully be easier to follow, and will post a link when done.

This may be on the difficult side, but I have tested it out and it works very well.

Otherwise if you have questions, let me know, I am not very prominent on here but I check Instagram daily and you can connect with me there and check out my current Gameboy pocket RP3A+ build.

My handle on Instagram is: tymarbry
Last edited by X.. on Tue Mar 05, 2019 12:36 am, edited 2 times in total.
My build Progress and Designs updated on my Instagram: https://www.instagram.com/tymarbry/?hl=en
Upcoming Build Tutorials on my Youtube: https://www.youtube.com/channel/UCI96Xu ... lPs7hWdRwQ


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Re: Guide - Brightness Control for LQ035NC111

Post by X.. » Sun Mar 03, 2019 10:59 am

geeze, that's embarrassing. turns out amazon photo doesn't like to share image links, but they should be fixed now!
Last edited by X.. on Tue Mar 05, 2019 2:26 pm, edited 1 time in total.
My build Progress and Designs updated on my Instagram: https://www.instagram.com/tymarbry/?hl=en
Upcoming Build Tutorials on my Youtube: https://www.youtube.com/channel/UCI96Xu ... lPs7hWdRwQ

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Re: Video/Visual Guide - Brightness Control for LQ035NC111

Post by MrErickson » Tue Mar 05, 2019 9:32 am

Nice!

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Re: Video/Visual Guide - Brightness Control for LQ035NC111

Post by sgtgrumbles » Tue Jul 23, 2019 8:11 pm

Excellent hack. I'm no electrical engineer but I was under the impression that you'd need a 555 timer or something to PWM the LED backlight enable pin. I guess not?

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