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### Topic: INA219 - Current voltage from battery liion 11.1v (Read 82 times)previous topic - next topic

#### prem111

##### Mar 26, 2020, 08:36 pmLast Edit: Mar 26, 2020, 09:28 pm by prem111
Hi, im have INA219 sensor for measure current voltage from battery 3s 11.1v

Below results:

Bus Voltage: 0.256 V
Bus Current: 412.439 mA
Power: 249.756 mW
Shunt voltage: 40.000 mV

The question is if I connect it well, plus batteries with vin + minus with vin- ?

Thanks for help !

#### Wawa

#1
##### Mar 26, 2020, 10:34 pm
The question is if I connect it well, plus batteries with vin + minus with vin- ?
Batt+ and load+ to the screw terminals, and batt- to INA219 ground.

Post a diagram/picture if you're not sure.
Leo..

#### prem111

#2
##### Mar 27, 2020, 07:17 amLast Edit: Mar 27, 2020, 07:18 am by prem111
Diagram attached. is that correct

#### Wawa

#3
##### Mar 27, 2020, 08:14 am
BEC is connected right.

Best to connect INA ground directly to an Arduino ground pin.
So four wires to connect between INA219 and Arduino.
5volt, ground, SCL, SDA.

Battery+, via the INA Vin screw terminals to load+.
Leo..

#### prem111

#4
##### Mar 27, 2020, 08:23 am
That's what I originally had, ina gnd -> gnd arduino, battery+ -> ina vin+ (screw) battery- -> vin- (screw)

Result:

Bus Voltage: 0.256 V
Bus Current: 412.439 mA
Power: 249.756 mW
Shunt voltage: 40.000 mV

#### JCA34F

#5
##### Mar 27, 2020, 08:26 am
What is the load that you are measuring the current of?

#### JCA34F

#6
##### Mar 27, 2020, 08:39 amLast Edit: Mar 27, 2020, 08:57 am by JCA34F
Quote
That's what I originally had, ina gnd -> gnd arduino, battery+ -> ina vin+ (screw) battery- -> vin- (screw)
You have probably burned out the INA219 shunt resistor. VIN- should go to BEC+.

#### prem111

#7
##### Mar 27, 2020, 08:56 am
VIN- to BEC+ IN or OUT ?

#### JCA34F

#8
##### Mar 27, 2020, 09:04 amLast Edit: Mar 27, 2020, 09:08 am by JCA34F
VIN- to BEC+ IN or OUT ?
In. Batt+ to INA VIN+ INA VIN- to BEC IN+ BEC OUT+ to Arduino Vcc, Arduino GND to BEC OUT-, BEC IN- to INA GND to Batt-. May need a separate wire from Arduino GND to INA GND.

#### prem111

#9
##### Mar 27, 2020, 10:33 am
I think I actually burned something, now after exactly such connection there is no power at BEC.

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