5v usb outputs on arduino

hello,

i would like to know if it is possible to have 2 5V usb outputs connected to an arduino for power?

thanks in advance

sorry bit vague...

Hello,
Arduino is just a microcontroller that is used to provide control signals with low power. It is not used to supply power to other devices. You can use power adapters or specific drivers for powering up the USB connectors.
Regards,

Hello

Because I would like to power an arduino and 2 5v usb outputs with only 1 power input.

thanks

2 USB outputs? Please grab pen and paper and show us logic block diagram.

I'll try again

1 Power input - supplying power to - arduino board and 2 5V usb ports

is that better even without a pen and paper?

thanks

No.

1 Like

The problem is the "5v USB output". The Arduino has no only 1 USB connector but it does not provide power. It is diode protected so that if your plug in a 12v barrel connector and the usb port simultaneously you don't fry your computer.

But the short answer to your question is "no". The USB 2.0 standard supplies 500mA of power for USB 2.0 devices. 2 of them would be 1 Amp. The onboard regulator on your Arduino would not be able to provide 1 A of power for other devices as well as power the microcontroller at the same time. You would fry your on-board regulator most likely. I would suggest powering your arduino and the other devices independently with at least a 5v 2a power supply.

well i'm sorry, but as a beginner i don't know how to explain what i want.

does this image give a different answer?

That is a picture of the power supply providing power to the arduino and to the two USB devices independently. Not the Arduino providing power to other devices.

If you don't know how to describe what you want, how do you expect someone to help you get what you want?

i said this just before maybe you did not see it.

Yes, you can share a power supply for an arduino with other devices as long as the power supply has enough power to power all 3 devices. For example, you could not power 2 USB devices and an arduino from 1 usb port on your PC. You need something with a higher current rating.

well that's why i go to this forum

to piece out what i want

It sure does!

That depends on the total load.

Use a powered hub that has 3 or more USB output ports.

In post #10 those boxes marked USB, are they type A or B USB connectors?
Are they going to both be uses as simple power only outputs?
Or do you want some sort of USB functionally from them?

Is the power going to the Arduino supposed to power the Arduino through the 5V input pin or is the power input carrying USB signals?
What is this power input derived from?
Is it from a PC?

That seems to be the best answer if you do not know the answers to all the above questions.