Damn, i was really convinced it would work..
[Solved] Another screen problem :(
- correia5022
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Re: Another screen problem :(
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Starting on electronics
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https://sudomod.com/forum/viewtopic.php ... 8&start=30
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Starting on electronics
My first build, 2 years later
https://sudomod.com/forum/viewtopic.php ... 8&start=30
Check out my Boombox: https://nrcboombox.wixsite.com/website
- correia5022
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Re: Another screen problem :(
Can you take a better photo as each chip?
________________________________________
Starting on electronics
My first build, 2 years later
https://sudomod.com/forum/viewtopic.php ... 8&start=30
Check out my Boombox: https://nrcboombox.wixsite.com/website
Starting on electronics
My first build, 2 years later
https://sudomod.com/forum/viewtopic.php ... 8&start=30
Check out my Boombox: https://nrcboombox.wixsite.com/website
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Re: Another screen problem :(
Maybe stop to focus on 5.0V, maybe your screen runs on 3.3 Volts as you already measured on the cap.
If it runs on 3.3V and the power consumption is not too hight you can resolve this voltage from the raspberry GPIO pins somewhere. Just google the GPIO pinout and try. Keep the drawn amperage in mind in case this does not work together with the PI...
If it runs on 3.3V and the power consumption is not too hight you can resolve this voltage from the raspberry GPIO pins somewhere. Just google the GPIO pinout and try. Keep the drawn amperage in mind in case this does not work together with the PI...
Re: Another screen problem :(
I was thinking the same, but i try on another similar display (4.3'' with similar board, i read the 3.3V with multimeter) and.... now it's burned.McGyver wrote: ↑Thu Jan 24, 2019 7:18 amMaybe stop to focus on 5.0V, maybe your screen runs on 3.3 Volts as you already measured on the cap.
If it runs on 3.3V and the power consumption is not too hight you can resolve this voltage from the raspberry GPIO pins somewhere. Just google the GPIO pinout and try. Keep the drawn amperage in mind in case this does not work together with the PI...
That's why i ask here, i don't want to buy the 3rd display XD
- correia5022
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Re: Another screen problem :(
have you unsticked that controller board from the screen?
Please do that. I have a similar board that has 5v and GND pads on the bottom of the pcb...
Please do that. I have a similar board that has 5v and GND pads on the bottom of the pcb...
________________________________________
Starting on electronics
My first build, 2 years later
https://sudomod.com/forum/viewtopic.php ... 8&start=30
Check out my Boombox: https://nrcboombox.wixsite.com/website
Starting on electronics
My first build, 2 years later
https://sudomod.com/forum/viewtopic.php ... 8&start=30
Check out my Boombox: https://nrcboombox.wixsite.com/website
- correia5022
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Re: Another screen problem :(
Also, i think that GBAAC chip is the solution, because seeing the traces coming from 12v, goes through a Schottky diode, then an inductor then i think the cap and then that chip.
SO, please measure the voltage across GND and the 1st pin of the right side of GBAAC (oposite side of that little stop)
(the pin that goes again to another inductor and 10v cap)
SO, please measure the voltage across GND and the 1st pin of the right side of GBAAC (oposite side of that little stop)
(the pin that goes again to another inductor and 10v cap)
________________________________________
Starting on electronics
My first build, 2 years later
https://sudomod.com/forum/viewtopic.php ... 8&start=30
Check out my Boombox: https://nrcboombox.wixsite.com/website
Starting on electronics
My first build, 2 years later
https://sudomod.com/forum/viewtopic.php ... 8&start=30
Check out my Boombox: https://nrcboombox.wixsite.com/website
Re: Another screen problem :(
Here the voltage of all Pin in GBAAC chipcorreia5022 wrote: ↑Thu Jan 24, 2019 1:15 pmAlso, i think that GBAAC chip is the solution, because seeing the traces coming from 12v, goes through a Schottky diode, then an inductor then i think the cap and then that chip.
SO, please measure the voltage across GND and the 1st pin of the right side of GBAAC (oposite side of that little stop)
(the pin that goes again to another inductor and 10v cap)
Re: Another screen problem :(
On the bottom of the pcb:correia5022 wrote: ↑Thu Jan 24, 2019 1:01 pmhave you unsticked that controller board from the screen?
Please do that. I have a similar board that has 5v and GND pads on the bottom of the pcb...
I think i'll try to use the 3.3V on the VCC33 pin... (i have to find something that give 3.3V first ).
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Re: Another screen problem :(
The raspberry itself gives 3.3 out of one of its GPIO pins. Just google the pinout. Maybe the power consumption of the screen is too high for this output. Do you have power values measured from your screen to compare with the pi 3.3 output specs maybe before trying?
See this link about raspberry pi 3.3V rail:
https://www.element14.com/community/thr ... hread=true
See this link about raspberry pi 3.3V rail:
https://www.element14.com/community/thr ... hread=true
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