kershner
Posts: 23
Joined: Sat Jun 07, 2014 8:54 pm

How to Power this 3.5 inch LCD?

Thu Jun 12, 2014 1:55 am

Hi all,

I'm going to use this display for my current project:
http://www.amazon.com/3-5-Inch-TFT-Moni ... al_qh_dp_i

It requires a 12v DC power source. I'm worried about the connector coming from the little LCD (the red tip). I'm not super familiar with electronic stuff like this (I'm a software guy) so I don't know if that tip needs a special adapter or anything.

What are my options for this? Can I just buy a wall adapter, like this:
http://www.amazon.com/Power-Adapter-Sup ... 2v+adapter ?

Thanks for the input!

lithium630
Posts: 14
Joined: Sat Aug 31, 2013 11:27 pm

Re: How to Power this 3.5 inch LCD?

Sun Jun 15, 2014 3:04 pm

You could cut the tip off, connect it directly to a step up transformer, and take power from a 5V GPIO pin. Guess it depends on what your project is. I am using the same screen for a portable. It really only takes about 6V (I forget the exact number) to work.

klricks
Posts: 6705
Joined: Sat Jan 12, 2013 3:01 am
Location: Grants Pass, OR, USA
Contact: Website

Re: How to Power this 3.5 inch LCD?

Sun Jun 15, 2014 9:30 pm

kershner wrote:Hi all,

I'm going to use this display for my current project:
http://www.amazon.com/3-5-Inch-TFT-Moni ... al_qh_dp_i

It requires a 12v DC power source. I'm worried about the connector coming from the little LCD (the red tip). I'm not super familiar with electronic stuff like this (I'm a software guy) so I don't know if that tip needs a special adapter or anything.

What are my options for this? Can I just buy a wall adapter, like this:
http://www.amazon.com/Power-Adapter-Sup ... 2v+adapter ?

Thanks for the input!

If the power supply connector does not fit the red connector on the screen directly then you could used the supplied 'pigtail' connector. You would cut the connector off of the POWER SUPPLY and splice into the 'pigtail'.
Be sure to double check the polarity (+)(-) on power supply, the red connector and the 'pigtail', before attempting to power anything up.
Unless specified otherwise my response is based on the latest and fully updated Raspbian Buster w/ Desktop OS.

chilinski
Posts: 16
Joined: Mon Sep 16, 2013 8:08 pm

Re: How to Power this 3.5 inch LCD?

Mon Jun 16, 2014 2:49 pm

Here's a good reference: http://www.wisegai.com/2012/11/29/raspb ... using-usb/ .
The monitor will also run off 5 volts with a little soldering and that might fit a bit better into your project.

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