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adafruit ina260 Vbus is too high
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adafruit ina260 Vbus is too high

by Tooot on Sun Sep 19, 2021 6:00 am

Hello guys, I use my stm32 F4 board to connect with adafruit ina 260, but Vbus is so high, i have no idea why.
get voltage:10984
get current: 148
get power:: 560

this is also without load, still Vbus is so high, is this module broken?
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Tooot
 
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Re: adafruit ina260 Vbus is too high

by adafruit_support_bill on Sun Sep 19, 2021 6:58 am

Your photo does not show all of your connections. Also please post the code you are using.

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Re: adafruit ina260 Vbus is too high

by Tooot on Sun Sep 19, 2021 7:50 am

i'm sorry , this is the whole circuit, i measured the Vbus always 11v. i dont understand where this comes from......
Thank you!
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2.png
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1.png
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Tooot
 
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Re: adafruit ina260 Vbus is too high

by adafruit_support_bill on Sun Sep 19, 2021 8:07 am

I don't see a ground connection between the INA260 and the circuit under test. Voltage is measured relative to ground. So without a ground connection to the circuit under test, the voltage readings are meaningless.

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Re: adafruit ina260 Vbus is too high

by Tooot on Sun Sep 19, 2021 9:10 am

the white cabel with read red "G", that is ground. also you can see it from 2.png

Tooot
 
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Re: adafruit ina260 Vbus is too high

by adafruit_support_bill on Sun Sep 19, 2021 9:38 am

That is the ground from your processor to the INA260. The voltage you are trying to measure is on the red board and you do not have a ground connection to it.

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Re: adafruit ina260 Vbus is too high

by Tooot on Sun Sep 19, 2021 11:11 am

thank you so much for help, i did it!!! thank you again!

Tooot
 
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Re: adafruit ina260 Vbus is too high

by adafruit_support_bill on Sun Sep 19, 2021 11:55 am

Good to hear. Thanks for the follow-up.

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Please be positive and constructive with your questions and comments.