All input power supply are power up. Doesn't work fine when unplug usb.
Can someone help to solve this problem.
How are you powering the UNO when the USB is unplugged?
Did you power the UNO from USB and another power source at the same time?
With the limited information I guess nobody can really tell what's up.
Please post a schematic / wiring diagram (photo of hand drawn one is fine).
Your code might also be problematic, so post it here; don't for get to use code tags as described in https://forum.arduino.cc/t/how-to-get-the-best-out-of-this-forum/679966#posting-code-and-common-code-problems.
What I can understand from your writing is that your Arduino UNO board is working fine when you are powering it with your computer's USB PORT. But it is not working when you are using a DC adapter/ power supply. When powered by an adapter, Arduino UNO 's recommended voltage range is 7-12 V. Please check if your adapter's output voltage is within this range.
Hi, my name is Mikey. I have been working with arduino for the past few years now and I would be happy to help troubleshoot your problem! could you please tell me how you are powering on your Arduino uno. if you could list if you are powering it from a computer, a wall outlet, if you are running it off the round plug, or to the USB upload port!
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