RPi5 + TFT + M2 Hat

Support Finding Parts
1

hi,

I’m currently trying to set up my Pi 5 with my original 7” TFT, and the M2 Hat (with 512GB sVME) and have realised the GPIO pins don’t protrude enough to power the TFT.

Has anyone had this issue, or could advise on what part/s would help?

I’m using a WaveForm case, as they’re supposed to be able to house pi +hat.

Thanks in advance, any help is appreciated.

1 Like
2

Hey there, @Peter40875,

How much power does the TFT require to operate, the GPIO pins should be able to supply up to 1A for the screen.

Are you using the official Pi 5 27W PSU? I know that when multiple hats are involved, particularly with the M.2. HAT, the 27W is sometimes not quite enough and people use the 45W instead.

3

Hi Jane
I am a bit confused here

Without looking it up I thought the GPIO pins would only supply a few mA and there is a total figure of mA which would only allow a few GPIO pins to be supplying current simultaneously, so you can’t draw this individual current from all the GPIO pins at the same time. This applies to source and sink.

The only conclusion I can make is that you are referring to a power pin here. That is not what I would call a GPIO pin. I think this whole set up is confusing enough without adding to it.

Lets call POWER pins (5V, 3.3V etc) POWER pins and GPIO (General Purpose Input/Output) pins GPIO pins to be specific and avoid confusion.

Of course I could be completely wrong here and ALL pins are referred to as GPIO and let confusion reign within the user community re power capability and requirements.

Or maybe I am the only one confused. I always knew there was a reason I don’t touch RPi.
Cheers Bob

2 Likes
4

Hey @Robert93820,

Nope, good point, you are correct, I was using GPIO to refer to all of the pins, which is something which is done quite a bit casually, when I meant Power pins.

Won’t be doing that again. Precision is key if we want to avoid error.

1 Like
5

Hi Jane

There should be no such thing as “casual” mention when trying to sort problems.

It is difficult enough trying to get enough accurate information as it is without further confusion.
Like pulling teeth sometimes.

I think it is a bit of a design blunder (I won’t call it a problem as it is self inflicted) actually. These non GPIO pins could have been separated fairly easily from the GPIO (Data and any analog) pins. Maybe at the expense of a bit of real estate and a slightly larger board but hey, anything to eliminate confusion and mistakes. After all this is hobby territory not a one off thing.
Cheers Bob

2 Likes