Replacement for burned Nano after powered by 12v on 5v pin

Other Hardware 3rd Party Boards
1

Urgent!
I'm doing with my project now and I burned my arduino Nano (3 leds ON).

I managed to use step-up DC-DC converter module 3.7v to 5v to power the arduino nano board through 5v pin. My bad, I didnt check the output of the step-up module using multitester yet. It showed 12v :sob: (Generally, the online shop doesnt do anything with the board and let 5v as the output voltage).

Based on the problem, I want to replace the components. What exactly components needed to replace, AMS1117 5v or CH3400 (USB driver) chip?

Note: Physically, Atmel chip, CH3400 and AMS1117 5v looks okay, but I suspect the AMS1117 5v since the Nano's still recognized by my notebook through USB port.
I also check the AMS1117 5v using multitester and it shows 4.2v at output pin.

Burned-Nano
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My advice would be to replace the Nano and throw away the old one.

2 Likes
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I agree but As a beginner of Arduino Circuit, I must know how to SOLVE A problem when I'm facing to it. (Dont worry, I suggest to all my friends to buy an original one ^_^)

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The fact that both Rx and Tx are on more than likely indicates a problem with the CH340.

When powered over USB, the voltage regulator has no function and the 5V comes from the USB. Power with 12V on Vin and check the 5V voltage; that would give an indication about the status of the AMS1117.

1 Like
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Yes, I solved the problem following your suggestion. I tested the AMS1117 5v powered by 11.1v and the AMS is okay.

I believe that if the CH34 driver was burned of course, it wouldnt be detected by USB Port. So, the CH34 is okay.

Conclusion:

  1. AMS1117 5v, tested, OK
  2. CH34, tested, OK

So, the rest must be the Atmel Chip and I then replaced it, done LOL
Solved 1000% :slight_smile:

solved
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