Hey guys!
So, I bought an arduino nano for a project, and I was measuring some voltages on it when my multimeter pointer probably touched another pin, then, my board just disconnected from my pc and I is not being recognized anymore.
The power LED is on but the board doesn't get recognized.
Thanks in advance!
there was a db9 port hooked to it, I was measuring the voltage between the A1 pin and the ground pin, I think I touched the gnd pin, the a1 pin and the reset pin, already tried another usb cable, and another usb port
btw the pinout of the db9 port to it was:
| DB9 || NANO |
| 1 | | |
| 2 || |
| 3 || |
| 4 || A0 |
| 5 || |
| 6 || GND |
| 7 || 5V |
| 8 || A1 |
| 9 || 5V |
Are there any other LEDs on? Do you have another to test your computer to be sure it was not fried? What you described should not have damaged anything. Reset is driven to grown when the processor is reset or powered up. A1 is an analog input and 0-Vcc is acceptable. Ground is the reference. Be sure all connections are valid.
No, there aren't any other LEDs on, and I just tried on a friend's computer, same thing unfortunately
I also believe it should not have damaged anything, but I don't know what else to do or test
What's the DB9 port? Where it connected to by its another end?
Do you guess that there may be voltages on computer connectors that are unacceptable for Arduino?
I find these apps invaluable when testing devices connected via usb:
USBDeView View any installed/connected USB device on your system shows all usb devices
USBLogView USBLogView - Records the details of any USB device that is plugged or unplugged into your system shows the changes in usb devices
USBTreeView USB Device Tree Viewer shows all the usb devices - with a LOPT of detail - as a connection tree.
All these are portable apps - dont need installing.
Hey!
this is a db9 port:
It's is connected to an G27 shifter from logitech, but that is just two potentiometers.
I don't really think there are voltages on the computer connectors that could fry my arduino, I was just using an USB 2.0 port on it
thanks for the answer!
Unfortunately, in none of these programs the board is shown
Try another lead as some USB leads are charging only. Also a different port.
however its not sounding good!
yeah, not sounding good
already tried another cable and port on both computers
Yup, the Nano sounds dead.
Odd, since shorting A1 to GND or Vcc or any other pin on the Nano itself wouldn't result in this failure mode. So something else apparently went wrong.
yea, I'm just wondering what could go wrong
I saw some posts here in the forum that had a similar situation, most of them was a faulty diode, so I will get a multimeter and test them to see if I can save this board
Yes, the 'power supply selection' diode can burn out if you short 5V to GND. In a pinch, I've replaced one of those with a simple 1N4148 I had lying around and brought the board back to life that way. The 700mV drop of a silicon diode isn't ideal, but in practice doesn't pose a problem in most cases.
Replacing with an MBR0520 or similar Schottky diode is nicer, of course.
hey, sorry for the delay
tested the diode, and it was indeed faulty (the S4 diode)
removed it and did a jump on it and it worked!
I won't use the Vin on the nano so I believe that not replacing it shouldn't be a problem
Thanks for the help guys
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If it is the one in series with Vin the jumper is not needed. With the jumper connecting something improperly to that can cause problems.
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