I'm pretty sure I ruined a Nano by accidentally plugging it into the USB (5V) of my laptop and also running 9V from a power adapter into Vin, (at the same time).
Just wanted confirmation that this is what made the Nano operate strangely afterwards.
Thanks for any input.
TonyAm
I don't think anyone on the forum can read your mind, so why not just tell us what operate strangely afterwards actually means.
It doesn't matter how strangley it operated, my question is could it damage the Nano. If you're not going to answer a question, why reply?
Because it could not damage your Arduino nano. How else would you communicate with your PC and power the Nano at the same time. Likely strange stuff is really normal stuff, depending on your program.
I have no idea what you're saying, please don't worry about it.
No, you say
So I think you owe an apology to @Paul_KD7HB
And no, the board is designed to support Vin power and USB connection at the same time.
It should be safe to use Vin and power via USB on official classic Arduinos. It's not always safe (for your PC) to power via USB and at the same time via 5V; that depends on the board in question.
I have a Mega power with 9V on Vin and via USB for a couple of years now and it does still work.
Note:
This reply assumes official classic Arduinos (Nano, Uno, Mega); for clones you are on your own and you will have to find the schematics of the exact board that you have.
Folks, it's ok. I officially call this thread closed.
You can't close the thread. You can mark it as solved by checking the "solved" box under one of the replies.
The thread will close itself 6 months after the last reply. If it's important, you could flag the thread to the moderators and ask them to close it.
If you look at the schematic of the Nano at:
https://content.arduino.cc/assets/NanoV3.3_sch.pdf
Then you will see the following:
When the Nano is powered from the USB port alone, current flows through the diode D1, from VUSB to provide the +5V that powers the Nano.
When the Nano also has power going to VIN, then the voltage regulator will supply the +5V for the Nano. The diode prevents the +5V from going to the USB port.
Apologies to all, and to Paul. I didn't communicate my question effectively, my fault. (But, I also don't respond well to snarky behavior).
My question is; what is the highest Voltage that can be put into the Vin pin of the Nano before there can be potential problems with the Nano?
See the spec 
Arduino Nano — Arduino Official Store
Note that this is for an official Nano; clones might be different.
Thank you. I appreciate it.
You are the only one with 'snarky behaviour'
@sonofcy, let it rest.
Hello,
Yes, looking back I see I was at fault here, sincere apologies to Paul, and to the other forum members.
TonyA
