Powering Gearbest Screen?

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a3k4
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Powering Gearbest Screen?

Post by a3k4 » Tue Jul 05, 2016 7:35 pm

I bought the Gearbest screen recommended in the Wiki and SidSilver's GBZ post post. I messed up the soldering, but I think I corrected it properly. (Luckily I bought two screens just in case!)

I'm not sure how to test the screen. SidSilver said they used "power from USB power supply and a camcorder as video input". I've figured out the video input (plugging the white and yellow into a camera), but not the USB power supply bit. How do I connect power?

Image

Thanks!
My wiring diagrams and schematics for Helder's boards and graceful shutdowns.

nsqpdn
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Re: Powering Gearbest Screen?

Post by nsqpdn » Tue Jul 05, 2016 7:46 pm

WHATCHOUT!!! You solder to GND instead of Vcc (the second connection starting from the right in the white plug sould be the first from the right).

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a3k4
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Re: Powering Gearbest Screen?

Post by a3k4 » Tue Jul 05, 2016 7:55 pm

Great catch!! I'll fix that. Any idea how I power it once I move the wire?
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Re: Powering Gearbest Screen?

Post by SidSilver » Tue Jul 05, 2016 10:38 pm

What I've done is cut the red jack and solder an old usb cable to the cut cable. Easy as red goes to red and black to black :)
So I have a kind of cable extension I can plug to a phone usb charger.

Don't plug the white it's AV2. On a camcorder the red and white are for sound. Just plug the yellow.

Before you power your screen I suggest you to check your solders with a multimeter to detect any shortcut. The pins are really close and it's easy to connect them with solder unfortunately

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Re: Powering Gearbest Screen?

Post by a3k4 » Thu Jul 14, 2016 10:50 am

@Sidsilver and @nsqpdn, thank you!

@sidsilver - is there a built-in color/contrast adjust? Doesn't seem like it to me.
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Re: Powering Gearbest Screen?

Post by SidSilver » Thu Jul 14, 2016 1:00 pm

a3k4 wrote:@Sidsilver and @nsqpdn, thank you!

@sidsilver - is there a built-in color/contrast adjust? Doesn't seem like it to me.
No buttons to setup the screen.
For me the screen is perfect as it is, no need to change the setup.

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Re: Powering Gearbest Screen?

Post by Raktageno » Mon Feb 06, 2017 10:20 am

I have the same screen and am at a loss about how to connect it to the raspberry pi zero. I took a couple pictures, here: https://imgur.com/gallery/QxfIE

Any help is appreciated.

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Re: Powering Gearbest Screen?

Post by Royalhighness » Tue Feb 07, 2017 10:14 am

Raktageno wrote:I have the same screen and am at a loss about how to connect it to the raspberry pi zero. I took a couple pictures, here: https://imgur.com/gallery/QxfIE

Any help is appreciated.
Vcc to PP1 or your powerstrip
GND to pp6 or ground on your powerstrip
VS1 to TV (the square hole)

What I did was solder 2 wires to GND on the controller board, one to Ground on my powerstrip and one to the round hole next to TV square.

I'm wondering if there would be a difference in the power consumption between the screen with the conversion and one without. Does anyone know?

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