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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 pm Last 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

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 am Last Edit: Mar 27, 2020, 07:18 am by prem111
Diagram attached. is that correct

Wawa

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+.
Load- returns directly to battery-.
Leo..

prem111

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

What is the load that you are measuring the current of?

JCA34F

#6
Mar 27, 2020, 08:39 am Last 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


JCA34F

#8
Mar 27, 2020, 09:04 am Last 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

I think I actually burned something, now after exactly such connection there is no power at BEC.

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