Remberry
Posts: 1
Joined: Thu Nov 23, 2017 9:43 am

Re: Modifying a 3.5" car display for USB power.

Thu Nov 23, 2017 10:25 am

BMS Doug wrote:
Mon Sep 04, 2017 1:34 pm
Scionsamurai wrote:
Sat Sep 02, 2017 12:46 am
Thank you for the reply BMS Doug!
I'm not sure if i'm in need of a new(decent) multimeter. I wasn't getting any reading from 1,3,4,5,6, or 8. I was getting in between 3.7 and 4.8 on 2 and 7.
This was when you were feeding it from a 5V supply?

Please connect a 12V supply to the board for testing purposes and tell us the voltage output on pin 3.
Hello everybody,

I have the same board but I am waiting for a new multimeter so I can't do the test.
However, I have better pictures, and we can read on the back VCC33 (lower right). So, is it possible to weld DC_IN wire on it and connect the board on a raspberry's 3.3V pin ? Or it is the wrong way ... I prefer have your assessment before burning something :roll:
There is an extra connectic to weld in the box so I suppose that they allow a modification in the design of the board (the two rounds in the middle?).

Sorry for my english.
Thank you.
Attachments
Top - Copie.jpg
Top - Copie.jpg (182.53 KiB) Viewed 1006 times
back - Copie.jpg
back - Copie.jpg (87.65 KiB) Viewed 1006 times
20171123_111521-01.jpeg
20171123_111521-01.jpeg (59.51 KiB) Viewed 1006 times

George.p
Posts: 1
Joined: Thu Jan 25, 2018 10:56 pm

Re: Modifying a 3.5" car display for USB power.

Thu Jan 25, 2018 11:07 pm

Hi
Anyone knows how to get this board to work on 5V? I found some posts but not sure if it works. Thank you guys
Attachments
rsz_20180125_230239.jpg
rsz_20180125_230239.jpg (29.8 KiB) Viewed 878 times

AdrianoMoura
Posts: 1
Joined: Sat Mar 03, 2018 9:13 am

Re: Modifying a 3.5" car display for USB power.

Sat Mar 03, 2018 9:16 am

Remberry wrote:
Thu Nov 23, 2017 10:25 am
BMS Doug wrote:
Mon Sep 04, 2017 1:34 pm
Scionsamurai wrote:
Sat Sep 02, 2017 12:46 am
Thank you for the reply BMS Doug!
I'm not sure if i'm in need of a new(decent) multimeter. I wasn't getting any reading from 1,3,4,5,6, or 8. I was getting in between 3.7 and 4.8 on 2 and 7.
This was when you were feeding it from a 5V supply?

Please connect a 12V supply to the board for testing purposes and tell us the voltage output on pin 3.
Hello everybody,

I have the same board but I am waiting for a new multimeter so I can't do the test.
However, I have better pictures, and we can read on the back VCC33 (lower right). So, is it possible to weld DC_IN wire on it and connect the board on a raspberry's 3.3V pin ? Or it is the wrong way ... I prefer have your assessment before burning something :roll:
There is an extra connectic to weld in the box so I suppose that they allow a modification in the design of the board (the two rounds in the middle?).

Sorry for my english.
Thank you.
I've bought an display and it had the same board, had you figure out how to solve this? I'm trying to find more information but I won't found any tutorial with this kind of board

snazzify
Posts: 17
Joined: Fri Jul 29, 2016 4:49 am
Location: California, USA

Re: Modifying a 3.5" car display for USB power.

Sun Aug 19, 2018 6:56 am

I followed a guide at Wiring Guide for the 3.5″ GearBest Screen with 5V Mod for my screen.
Capture.PNG
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