Electrical Engineering Stack Exchange
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Questions tagged [ina219]

A 26 V, 12-bit, zero drift, bidirectional current/voltage/power monitor integrated circuit with I2C output from Texas Instruments. Consider using this tag in conjunction with "integrated-circuit" and "i2c" if applicable.

A 26 V, 12-bit, zero drift, bidirectional current/voltage/power monitor integrated circuit with I2C output from Texas Instruments. Consider using this tag in conjunction with and if applicable.

See TI's product page for the INA219 for more information.

16 questions
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Connection with INA219 Current sensor

I want to measure the current at point A. This is a constant current circuit driving a laser. But to connect it with INA219, how can I connect it to my circuit? Option 1: Do I need a shunt resistor in series and Vin+ and Vin- are connected between…
Teena
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No current changes using INA219 to reading industrial sensor

I intended to use the INA219 chip to read the 4-20 mA current loop of the industrial sensor for the automation project. the sensor voltage is 12 V, my first schematic was as follows: The ground of the MCU and the sensor are the same. However when I…
Hamid s k
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How does the INA219 get 15 bits with a 12 bit ADC and no oversampling?

I'm working the INA219 and reading it's datasheet and I have a doubt. I'm working with 1 sample of 12 bits (no oversampling). The shunt voltage register has 15 bits plus sign when the PGA is configured in its /8 mode as shown in figure 20 (page 21).…
Zheoni
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Sensor output current vs voltage reading options for accuracy

I am trying to choose between two sensor output types. Either 0-10V or 4-20mA. I am using the INA219B to measure current right now but I am wondering if getting a different output sensor would be more accurate. I understand current and voltage are…
Spider999
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Current and speed measurement of DC Motor with esp32

I am measuring current and speed of dc motor with esp32. I am using hall sensor for speed measurement and INA219 sensor for current measuremnt. When i measure these separately it gives accurate values. But when i meausre current and rpm…
umar farooq
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INA219 to measure battery voltage

I want to measure the voltage of batteries. I am using an INA219 powered by an Arduino MKRWAN 1300. I have connected the INA219 to the MKRWAN as seen in the image below: However, I seem to have a hard time connecting the batteries to the INA219.…
Roda Jhayance Joceli Lacson
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Can I use an INA219 to measure the load while using a solar panel?

I am using a a solar panel connected to this solar power manager. On the output (5 V) I will connect a circuit with an Arduino, sensors, and an INA219 on a breakout board to measure the total load current, voltage, and power, always on the…
just_learning
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INA219 load voltage stuck at 1 V

I’m using an INA219 and I’m trying to take a reading of voltage and current. When I’m looking at the current reading, it looks perfectly fine, however, the load voltage remains the same and it is stuck at 1 V. I’ve used four 0.5 W solar panels…
Neamus
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INA219- I2c bus weird behavior

I have a PCB assembly where I built the circuit in the schematic below. I did not start programming yet. I'm getting the weirdest problem. When I check the voltages in the SDA and SCL lines (which should be 5 V because of the pull-up resistors) I…
André Oliveira
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Weird readings with INA219 Current/volt sensor, Arduino and big, fat scary Lipo

I have a strange situation with an I2C INA219 current/volt meter module (datasheet). In front of me, I have a rather scary 16.8V lipo - its positive output is on the VIN+ of the INA219. The VIN- leads off to a big chunky switch, which leads off to…
Hoets
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Current sensor problem

I'm using INA219 to read the hold system current like the schematic The problem line in the DC-DC converter. When I use IC MP2315 DC-DC converter, INA219 seem like just read the off period of PWM switch and it value is 3mA when I read form Serial…
GiaHuy Nguyen
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PCB design for MAX31865+INA219

I'm designing a PCB for a device, which will contain the following functional blocks: 12V power input with SCR crowbar, reverse polarity protection, soft-start, and 3.3V linear regulator. Regulator feeds all ICs on the board…
Zhenek
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INA219 current sensor allowing only 300mA of current between its VIN+ and VIN- terminals. Why?

I'm building an Arduino circuit to detect/limit the maximum charging current to a camera flash. I decided to use an INA219 breakaout board, which comes with a R100 resistor as a shunt so it should allow measurements of 3.2A maximum. Before…
Rodrigo
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INA219 Voltage measurements meaning

I have a battery holder, 3 x 1.5V AA, connected to a resistor (100 Ohm or close), LED and Adafruit INA219 breakout board. The bus voltage reading from the INA219 reports 1.0V. Where does this number come from? The voltage measured at LED tips is…
Paperino
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INA219 high current measurements for my autonomous boat?

I'm building an autonomous boat which will contain solar panels for its energy needs. The current prototype contains a 20W solar panel. All the electronics work great so it's time to scale up. The next prototype I'm working on will contain a 100W…
kramer65
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