Hello-
im hoping to get a little advice on what PS to choose for my project. i am using a RPi 3B+ and using a HDMI 4 Pi display, no touch 800x400.
https://www.adafruit.com/product/1934
On the Adafruit page it says that it can be powered using 5-24V. Im curious, how should I determine what PS to use with the display? I suppose i could just go with the 24V, but Im not really sure what benefits/draw-backs are.
Any advice is appreciated! Thanks in advance
Advice on power supply for RPi screen
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Talk about Adafruit Raspberry Pi® accessories! Please do not ask for Linux support, this is for Adafruit products only! For Raspberry Pi help please visit: http://www.raspberrypi.org/phpBB3/
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- Franklin97355
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- Joined: Mon Apr 21, 2008 2:33 pm
Re: Advice on power supply for RPi screen
According to the product description you linked,
I think you would be OK using the same power supply as the RPi for simplicity as a start.simply connect a 5-12VDC adapter to the 2.1mm center-positive DC jack, then connect a digital video source to one of the ports . Voilà, a display!
- zara2355
- Posts: 107
- Joined: Tue Jun 18, 2013 6:43 pm
Re: Advice on power supply for RPi screen
Thanks!
I guess my question is really "why" use one voltage over another?
Aside from cost, is there any good reason for using 5V vs 9V vs 12V vs 24V?
I guess my question is really "why" use one voltage over another?
Aside from cost, is there any good reason for using 5V vs 9V vs 12V vs 24V?
- Franklin97355
- Posts: 23940
- Joined: Mon Apr 21, 2008 2:33 pm
Re: Advice on power supply for RPi screen
I have not researched the screen but I think the screen has a regulator and is able to use the voltage range you need for the other parts of your project.
- adafruit_support_bill
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Re: Advice on power supply for RPi screen
We do not design these in-house. But from looking at the components on the board, it looks like there is a switch-mode-regulator which can derive the necessary internal voltages from a range of supply voltages.
That said, voltage regulators tend to be less efficient at the extremes of their operating range. And these appear to work best with a 9v-12v supply: https://learn.adafruit.com/hdmi-ubergui ... iver-board
That said, voltage regulators tend to be less efficient at the extremes of their operating range. And these appear to work best with a 9v-12v supply: https://learn.adafruit.com/hdmi-ubergui ... iver-board
- zara2355
- Posts: 107
- Joined: Tue Jun 18, 2013 6:43 pm
Re: Advice on power supply for RPi screen
Ok, cool, that makes sense. Looks like 9-12V it is!
Thanks everyone!
Thanks everyone!
Forum rules
Talk about Adafruit Raspberry Pi® accessories! Please do not ask for Linux support, this is for Adafruit products only! For Raspberry Pi help please visit: http://www.raspberrypi.org/phpBB3/
Talk about Adafruit Raspberry Pi® accessories! Please do not ask for Linux support, this is for Adafruit products only! For Raspberry Pi help please visit: http://www.raspberrypi.org/phpBB3/