Maximum of ground

[Ivan219]

Hello, I know that ground works only with 3,3v - but how many milliamperes is supporting? Can I connect two gpios (or more) with one ground?

[PeterO]

Simple answer: Yes

Longer Answer: The ground pins will be able to sink all of the current that comes from the GPIO pins.

PeterO

[Ivan219]

Thank for reply. Can I use only one ground with all gpios? And what about 3,3v pins?

[PeterO]

Using more than one ground pin is generally better.

What are you driving from the GPIO pins ?
What are you powering from the 3V3 supply ?

PeterO

[Ivan219]

I am using LEDs only now. I want to connect seven-segment LED, can I use one ground? Is it not hurt my raspberry pi?


And how use 5 volts pin, if raspberry pi haven't 5volts ground?

[gordon77]

Ground is ground for 3.3v and 5v. All grounds are connected together, use as many as you want.

[Ivan219]

Thank you! Ground hasn't limits - it's good for me. And can I use gpio pin as ground?

[gordon77]

No, only gpio ground pins

[Ivan219]

Sorry, what?

[joan]

Sorry, what?

Only use the ground pins for ground.

[Ivan219]

Ok, thank you.