External power use problem

Other Hardware General Electronics
1

When I power arduino with 7.5 V wall charger adaptor I get 6.4 volts at 5V pin. This happened with my Nano board also is it that my board regulators are faulty or gone ?

2

Welcome to the forum

How are you connecting the wall charger output to the Arduino ?

3

  • If you are measuring between the 5v pin to GND, your board goes into the garbage.

  • What does the 7.5v measure ?

4

Is the type of Arduino board a secret? You can tell me, I won't tell.

Please read the how to get the best from the forum posts.

Have you measured that under load?

5

By a barrel jack or through Vin and ground of the board
I removed the controller chip from the board (arduino Uno R3 )

6

Iam not sure if the chip receives 6.4 volts whether it will survive. I do not know how to load without taking the risk of burning the chip

7
  • There are other components that use 5v, if you are getting 6.4v, these components will be damaged too.
8

I moved your topic to an appropriate forum category @sck_ardu.

In the future, please take some time to pick the forum category that best suits the subject of your topic. There is an "About the _____ category" topic at the top of each category that explains its purpose.

This is an important part of responsible forum usage, as explained in the "How to get the best out of this forum" guide. The guide contains a lot of other useful information. Please read it.

Thanks in advance for your cooperation.

9

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