I tried the Arduino sketch from EWC_Box, which works with these screens, but it still did not work, so the problem is with the wiring. I updated the drawing to show a couple of level shifters regulating voltage between the controller and screens.
Schematic with level shifters
When I opened the enclosure, I realized the power wire to the screens was disconnected due to a missing solder bridge. I attached it to 5V, and powered everything up. One of the screens turned blue, a new development, and one turned white for a moment, then went dark. I installed the level shifters on the prototyping board and connected 5V, 3.3V, and ground, then the signal wires. When I reapplied power, the dark screen stayed dark, and the blue screen was white again. When I sent 5V to them, I burned one or maybe both. Next time, I will use pluggable headers.
Level shifter boards
GitHub repo for EWC_Cyberdeck.
The rest of the posts for this project have been arranged by date.
First time here?
Completed projects from year 1
Completed projects from year 2
Completed projects from year 3
Completed projects from year 4
Completed projects from year 5
Completed projects from year 6
Completed projects from year 7
Completed projects from year 8
Completed projects from year 9
Completed projects from year 10
Disclaimer for http://24hourengineer.blogspot.com and 24HourEngineer.com
This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.
All information on this blog, or linked by this blog, is not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property, or similar, is the responsibility of those involved in the replication.
All digital communication regarding the email address 24hourengineer@gmail.com becomes the intellectual property of Brian McEvoy. Any information contained within these messages may be distributed or retained at the discretion of Brian McEvoy. Any email sent to this address, or any email account owned by Brian McEvoy, cannot be used to claim property or assets.
Comments to the blog may be utilized or erased at the discretion of the owner. No one posting may claim property or assets based on their post.
This blog, including pictures and text, is copyright to Brian McEvoy.
2023-11-02
When I opened the enclosure, I realized the power wire to the screens was disconnected due to a missing solder bridge. I attached it to 5V, and powered everything up. One of the screens turned blue, a new development, and one turned white for a moment, then went dark. I installed the level shifters on the prototyping board and connected 5V, 3.3V, and ground, then the signal wires. When I reapplied power, the dark screen stayed dark, and the blue screen was white again. When I sent 5V to them, I burned one or maybe both. Next time, I will use pluggable headers.
GitHub repo for EWC_Cyberdeck.
The rest of the posts for this project have been arranged by date.
First time here?
Completed projects from year 1
Completed projects from year 2
Completed projects from year 3
Completed projects from year 4
Completed projects from year 5
Completed projects from year 6
Completed projects from year 7
Completed projects from year 8
Completed projects from year 9
Completed projects from year 10
Disclaimer for http://24hourengineer.blogspot.com and 24HourEngineer.com
This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.
All information on this blog, or linked by this blog, is not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property, or similar, is the responsibility of those involved in the replication.
All digital communication regarding the email address 24hourengineer@gmail.com becomes the intellectual property of Brian McEvoy. Any information contained within these messages may be distributed or retained at the discretion of Brian McEvoy. Any email sent to this address, or any email account owned by Brian McEvoy, cannot be used to claim property or assets.
Comments to the blog may be utilized or erased at the discretion of the owner. No one posting may claim property or assets based on their post.
This blog, including pictures and text, is copyright to Brian McEvoy.
2023-11-02
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