I changed the high/low state for the screen's RESET pins because I was unsure how it was meant to operate, but this did not fix the problem. I checked if the backlight was on a PWM pin, but it was not. I swapped out the screen for a spare I had, but it behaved the same. The last thing I tried with this controller and screen was to power all the pins from 5V signals instead of routing them through a level shifter. I even retested the SD adapter to ensure I did not break any wires.
I brought out a spare Arduino Mega and a spare screen to test with default settings and pins. I found that the "PWM" in the program responds backward, so I ran that wire to a "GND" connection to keep the light active. I had to tie the "RESET" pin to 3.3V at startup, which was good to know, and the screen ran the example program. I am pleased to have a known-good configuration.
Example program
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
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.
2022-02-17
I brought out a spare Arduino Mega and a spare screen to test with default settings and pins. I found that the "PWM" in the program responds backward, so I ran that wire to a "GND" connection to keep the light active. I had to tie the "RESET" pin to 3.3V at startup, which was good to know, and the screen ran the example program. I am pleased to have a known-good configuration.
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
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.
2022-02-17
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