I'm in the process of building 4 of these for myself and some friends. I have been having a lot of display issues on two of them and after a lot of testing continuity and reflowing solder I turned to AI for some advice. It suggested that despite the display being acceptable for 5v, it actually only wants to see 3.3v if all the rest of it's inputs are 3.3v. Basically it said I was getting lucky with tolerances that the 2 of 4 seemed to be working. So I moved the power for the display over to the 3.3v output on the RP2040 and that immediately solved that issue. However it created a new issue because it would no longer recognize the sd card reader. So I'm now on a path to add a diode in between the original 5v power source into the display to drop the voltage closer to the 3.3v it wants to see. I should know the results later this week.
As a side note, I do believe that the 10000pf capacitor on the motor driver should not be omitted, in spite of what was said in the video, as initially I saw some improvement in the display issue when I added the capacitor but it was intermittent improvement.
I'm in the process of building 4 of these for myself and some friends. I have been having a lot of display issues on two of them and after a lot of testing continuity and reflowing solder I turned to AI for some advice. It suggested that despite the display being acceptable for 5v, it actually only wants to see 3.3v if all the rest of it's inputs are 3.3v. Basically it said I was getting lucky with tolerances that the 2 of 4 seemed to be working. So I moved the power for the display over to the 3.3v output on the RP2040 and that immediately solved that issue. However it created a new issue because it would no longer recognize the sd card reader. So I'm now on a path to add a diode in between the original 5v power source into the display to drop the voltage closer to the 3.3v it wants to see. I should know the results later this week.
As a side note, I do believe that the 10000pf capacitor on the motor driver should not be omitted, in spite of what was said in the video, as initially I saw some improvement in the display issue when I added the capacitor but it was intermittent improvement.