So I just got an Arduino Uno and have figured out that I am not getting a 5V supply out of the board.
When Uno is powered, will it automatically output 5V or do I have code that into my program?
Any advise would be great.
How are you powering the Arduino?
If you are using USB, there should be 5v on the header .
If you are using an external supply, what are you using? It should be between 7 and 12v, preferably 9v.
What exactly do you mean by output 5V? From where?
Weedpharma
How did you figure out you aren't getting 5V? An easy way to know would be to plug the 5V into an analog pin defined for input, which will show the power. If you are using USB for power, you will see that its voltage actually oscillates
you will see that its voltage actually oscillates
No it should not. Please do not confuse the word oscillate with noise.
As far as i know arduino output around 5V from 5V supply pin. Measure it by a multimeter between 5V pin and gnd pin (not digital or analog pins). You dont have to write a code to activate it. By the way, which pin you try to get out 5V ?
You dont have to write a code to activate it.
Yes you do!
You have to use the pinMode call to set the pin to be outputs. Then you have to write a HIGH to that pin.
EDIT: Previous post is now edited to answer my objections.
Grumpy_Mike:
Yes you do!You have to use the pinMode call to set the pin to be outputs. Then you have to write a HIGH to that pin.
I meant for main 5V supply pin (i have corrected my previous entry), not other digital or analog pins. Do we need to write a code to get 5V supply from arduino?
Exxon, please do not edit previous posts without making a note on the post what or why it was edited, if it changes the post and makes later threads nonsensical.
Weedpharma
I also have this problem. I test-connected Arduino on 3 computers via USB and measured the voltage with the multimeter. Arduino was showing different readings between 5V and GND on all 3 computers. 4.88V, 5.06V and 5.11V. While 3.3V ouput pin was a 3.3 on all 3 computers
Arduino was showing different readings between 5V and GND on all 3 computers. 4.88V, 5.06V and 5.11V.
Yes it will do, they are all withing the specification for a USB power supply.