BW screen getting warm

Having trouble with your GBZ build? Ask your questions here!
Post Reply
User avatar
Wailer
Posts: 119
Joined: Mon Jan 15, 2018 3:45 pm
Location: Tiel, The Netherlands
Has thanked: 30 times
Been thanked: 38 times

BW screen getting warm

Post by Wailer » Wed Mar 14, 2018 3:22 pm

Hello fellow modders,

I noticed that my bw display is getting warm after some time.
The heat i believe is emitted by the pcb, its not the graphics chip but the capacitors surrounding the voltage regulator.
Has anyone noticed this, or is this normal.

My screen runs on 5v with no modding needed.

User avatar
tinkerBOY
Posts: 710
Joined: Tue May 30, 2017 4:00 am
Has thanked: 294 times
Been thanked: 206 times

Re: BW screen getting warm

Post by tinkerBOY » Thu Mar 15, 2018 7:39 am

The BW screen I used on my first build gets hot to the touch on the graphics chip but I play with it almost everyday without any problem. Although it works with 5v out of the box I still modified it to directly work with 5v. Much more power efficient this way.
New! tinkerBOY PowerSwitch v1.0 with Safe Shutdown
Game Boy Zero Controllers available @ tinkerBOY.xyz * Support
tinkerBOY Controller v3.0 - built-in usb controller, usb audio, and usb hub
tinkerBOY Controller v2.0 - GPIO buttons and builtin PWM Audio and Amplifier
tinkerBOY Controller v1.1 - simple pcb button
* DPI Adapter - better display for GBZ
* keyboard converters - IBM XT/AT Soarer's Converter | ADB to USB Converter

User avatar
Wailer
Posts: 119
Joined: Mon Jan 15, 2018 3:45 pm
Location: Tiel, The Netherlands
Has thanked: 30 times
Been thanked: 38 times

Re: BW screen getting warm

Post by Wailer » Thu Mar 15, 2018 10:30 am

Ok, thanks for the info.
My build isn't completely finished so maybe I'll remove the voltage regulator anyway.
It's good to hear that heat development isn't causing any problems.

User avatar
Hex
Posts: 113
Joined: Tue Aug 16, 2016 12:10 am
Has thanked: 12 times
Been thanked: 47 times

Re: BW screen getting warm

Post by Hex » Wed Mar 28, 2018 1:55 pm

Hey can you post pics of your display pcb ?
Sent from 20,000 leagues under the sea

My Cardboard GBZ build : http://www.sudomod.com/forum/viewtopic.php?f=9&t=2851

EmulationStation optimization for Pi Zero : http://www.sudomod.com/forum/viewtopic.php?f=8&t=2922

User avatar
Wailer
Posts: 119
Joined: Mon Jan 15, 2018 3:45 pm
Location: Tiel, The Netherlands
Has thanked: 30 times
Been thanked: 38 times

Re: BW screen getting warm

Post by Wailer » Wed Apr 04, 2018 12:57 am

Hex wrote:
Wed Mar 28, 2018 1:55 pm
Hey can you post pics of your display pcb ?
20180217_150800.jpg
20180217_150800.jpg (4.99 MiB) Viewed 5770 times

User avatar
Hex
Posts: 113
Joined: Tue Aug 16, 2016 12:10 am
Has thanked: 12 times
Been thanked: 47 times

Re: BW screen getting warm

Post by Hex » Wed Apr 04, 2018 9:27 pm

See the empty holes on the right side? The top most is 3.3v and bellow that is GND. That should power your lcd nicely. Use that and the composite input (3 wires in total) for the LCD. That should do
Sent from 20,000 leagues under the sea

My Cardboard GBZ build : http://www.sudomod.com/forum/viewtopic.php?f=9&t=2851

EmulationStation optimization for Pi Zero : http://www.sudomod.com/forum/viewtopic.php?f=8&t=2922

User avatar
Wailer
Posts: 119
Joined: Mon Jan 15, 2018 3:45 pm
Location: Tiel, The Netherlands
Has thanked: 30 times
Been thanked: 38 times

Re: BW screen getting warm

Post by Wailer » Fri Apr 20, 2018 12:14 am

Hex wrote:
Wed Apr 04, 2018 9:27 pm
See the empty holes on the right side? The top most is 3.3v and bellow that is GND. That should power your lcd nicely. Use that and the composite input (3 wires in total) for the LCD. That should do
Good suggestion, hadn't thought of that I will give it a try.
If i understand this correctly this should bypass the on board regulator, and that (at least the capacitors surrounding the regulator) is the main source of the heat development.
👍

User avatar
Wailer
Posts: 119
Joined: Mon Jan 15, 2018 3:45 pm
Location: Tiel, The Netherlands
Has thanked: 30 times
Been thanked: 38 times

Re: BW screen getting warm

Post by Wailer » Fri Apr 20, 2018 1:20 am

Here's another pic of the back of the pcb.
To bad there's no further (silkscreen) info on the four extra connector's.
But there are a lot of test-points worth checking out...
back.jpg
back.jpg (630.58 KiB) Viewed 5654 times

User avatar
Hex
Posts: 113
Joined: Tue Aug 16, 2016 12:10 am
Has thanked: 12 times
Been thanked: 47 times

Re: BW screen getting warm

Post by Hex » Mon Apr 23, 2018 5:19 pm

You can use the 5v test point for 5v or use the 3.3v i suggested. The IC runs on 3.3v and the entire board works on 3.3v so it should not be a problem. This is useful if powering directly from 3.7v battery without a boost circuit.
Sent from 20,000 leagues under the sea

My Cardboard GBZ build : http://www.sudomod.com/forum/viewtopic.php?f=9&t=2851

EmulationStation optimization for Pi Zero : http://www.sudomod.com/forum/viewtopic.php?f=8&t=2922

Post Reply

Who is online

Users browsing this forum: No registered users and 1 guest