Double power supply, different output, for RPI and screen controller

[emlowe]

I used a 12v 5a power supply with the same board - you don’t have to stick with 3a, that’s a minimum recommendation for the controller. So getting a 5a power supply should cover easily the controller and the rpi.

-Earle

[emlowe]

I’m terrible with the soldering iron but here is what I did

[ctessier]

Ok awesome thanks! Lucky for you we don’t see the solder on the picture ;) but I get what you did! Thanks a lot for the advise.

Will keep the post updated when I get the stuff

Clément

[ctessier]

Hi,

I received the monitor controller board way early than expected and got a power supply from Amazon (12V 5A to get enough juice for the board and the RPI as advised):

https://www.amazon.fr/gp/product/B01LT77HW6/ref=ox_sc_act_title_1?smid=A30SNSYXWKC8W6&psc=1

I am very happy to announce that my old laptop’s screen works!

And the board has indeed a 5V output which I tested and seems to work fine!

Next step: get some header pins and cable to power up the RPI from the controller board!

Thank you guys again for your advise.
Have a good weekend

[bachoo786]

@ctessier hey well done on setting up everything.

I want to know how much current are you getting from the board using the 5V pin? Are you getting 1.5Amp as stated in the data sheet or are you getting more than 1.5A because you are using the 12V 5A adapter to power the whole board?

Many thanks.

[bachoo786]

@emlowe using the 12V 5A how much does the rpi get then? more than the advertised 1.5A or? In the future I would consider using the usb ports of the rpi.

Thanks.

[HattyCurll]

Hi…unless the PSUs are designed to tolerate it, a voltage mismatch (even within the +/- 0.25V tolerance) could destroy one or both PSUs.
Just get a decent PSU with adequate output, like the “official” 2.5A, or bigger if required for power-hungry peripherals .

printed circuit board