CJMCU-219 INA219 I2C Zero Drift Bi-Directional Power Monitoring Module
CJMCU-219 INA219 I2C Zero Drift Bi-Directional Power Monitoring Module
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CJMCU-219 INA219 I2C Zero Drift Bi directional Power Monitoring Module

SKU: ELC1116

₹ 279.99 ₹ 399.99

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CJMCU-219 INA219 I2C Zero Drift Bi directional Power Monitoring Module₹ 279.99
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This breakout board will solve all your power-monitoring problems. Instead of struggling with two multimeters, you can just use the handy INA219B chip on this breakout to both measure both the high side voltage and DC current draw over I2C with 1% precision.
 
Most current-measuring devices such as our current panel meter are only good for low side measuring. That means that unless you want to get a battery involved, you have to stick the measurement resistor between the target ground and true ground. This can cause problems with circuits since electronics tend to not like it when the ground references change and move with varying current draw. This chip is much smarter - it can handle high side current measuring, up to +26VDC, even though it is powered with 3 or 5V. It will also report back that high side voltage, which is great for tracking battery life or solar panels.
 
A precision amplifier measures the voltage across the 0.1 ohm, 1% sense resistor. Since the amplifier maximum input difference is ±320mV this means it can measure up to ±3.2 Amps. With the internal 12 bit ADC, the resolution at ±3.2A range is 0.8mA. With the internal gain set at the minimum of div8, the max current is ±400mA and the resolution is 0.1mA. Advanced hackers can remove the 0.1 ohm current sense resistor and replace it with their own to change the range (say a 0.01 ohm to measure up 32 Amps with a resolution of 8mA)
 
We include a 6-pin header (so you can easily attach this sensor to a breadboard) as well as a 3.5mm terminal plug so you can easily attach and detach your load. Usage is simple. Power the sensor itself with 3 to 5VDC and connect the two I2C pins up to your microcontroller. Then connect your target power supply to VIN+ and the load to ground to VIN-
 

TECHNICAL DETAILS

  • Uses the INA219B chip, see datasheet for detailed specifications
  • 0.1 ohm 1% 2W current sense resistor
  • Up to +26V target voltage
  • Up to ±3.2A current measurement, with ±0.8mA resolution
  • 0.9" x 0.8" PCB
  • This board/chip uses I2C 7-bit addresses 0x40, 0x41, 0x44, 0x45, selectable with jumpers
How do I power the module and what is the voltage range for the measured circuit?
Power the sensor with 3 to 5V DC. The board can measure up to up to 26V on VIN plus while the device is powered from 3 to 5V.
What measurements can I obtain and what is the resolution?
The INA219B measures high side voltage and DC current across a 0.1 ohm 1 percent sense resistor. It supports up to plus 3.2A with 0.8 mA resolution on the plus minus 3.2 A range, and with the gain set to minimum div8 the range is plus minus 400 mA with 0.1 mA resolution.
What are the I2C addressing options on this board?
The board uses I2C 7 bit addresses 0x40, 0x41, 0x44, and 0x45 selectable with jumpers.
What connectors are included and how do I connect the load and the microcontroller?
A 6 pin header for breadboard attachment and a 3.5 mm terminal plug for the load. Connect VIN plus to the supply, VIN minus to the load return, and the two I2C pins to your microcontroller.
Is there a warranty or return policy for this module?
Warranty and return details are not specified in the product description; please contact the seller for information.
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Welcome to the discussion thread for CJMCU-219 INA219 I2C Zero Drift Bi directional Power Monitoring Module
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Description
Ask AI about this product
Open in ChatGPT Open in Claude Open in Gemini
This breakout board will solve all your power-monitoring problems. Instead of struggling with two multimeters, you can just use the handy INA219B chip on this breakout to both measure both the high side voltage and DC current draw over I2C with 1% precision.
 
Most current-measuring devices such as our current panel meter are only good for low side measuring. That means that unless you want to get a battery involved, you have to stick the measurement resistor between the target ground and true ground. This can cause problems with circuits since electronics tend to not like it when the ground references change and move with varying current draw. This chip is much smarter - it can handle high side current measuring, up to +26VDC, even though it is powered with 3 or 5V. It will also report back that high side voltage, which is great for tracking battery life or solar panels.
 
A precision amplifier measures the voltage across the 0.1 ohm, 1% sense resistor. Since the amplifier maximum input difference is ±320mV this means it can measure up to ±3.2 Amps. With the internal 12 bit ADC, the resolution at ±3.2A range is 0.8mA. With the internal gain set at the minimum of div8, the max current is ±400mA and the resolution is 0.1mA. Advanced hackers can remove the 0.1 ohm current sense resistor and replace it with their own to change the range (say a 0.01 ohm to measure up 32 Amps with a resolution of 8mA)
 
We include a 6-pin header (so you can easily attach this sensor to a breadboard) as well as a 3.5mm terminal plug so you can easily attach and detach your load. Usage is simple. Power the sensor itself with 3 to 5VDC and connect the two I2C pins up to your microcontroller. Then connect your target power supply to VIN+ and the load to ground to VIN-
 

TECHNICAL DETAILS

  • Uses the INA219B chip, see datasheet for detailed specifications
  • 0.1 ohm 1% 2W current sense resistor
  • Up to +26V target voltage
  • Up to ±3.2A current measurement, with ±0.8mA resolution
  • 0.9" x 0.8" PCB
  • This board/chip uses I2C 7-bit addresses 0x40, 0x41, 0x44, 0x45, selectable with jumpers
FAQ
How do I power the module and what is the voltage range for the measured circuit?
Power the sensor with 3 to 5V DC. The board can measure up to up to 26V on VIN plus while the device is powered from 3 to 5V.
What measurements can I obtain and what is the resolution?
The INA219B measures high side voltage and DC current across a 0.1 ohm 1 percent sense resistor. It supports up to plus 3.2A with 0.8 mA resolution on the plus minus 3.2 A range, and with the gain set to minimum div8 the range is plus minus 400 mA with 0.1 mA resolution.
What are the I2C addressing options on this board?
The board uses I2C 7 bit addresses 0x40, 0x41, 0x44, and 0x45 selectable with jumpers.
What connectors are included and how do I connect the load and the microcontroller?
A 6 pin header for breadboard attachment and a 3.5 mm terminal plug for the load. Connect VIN plus to the supply, VIN minus to the load return, and the two I2C pins to your microcontroller.
Is there a warranty or return policy for this module?
Warranty and return details are not specified in the product description; please contact the seller for information.
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A
Admin
Welcome to the discussion thread for CJMCU-219 INA219 I2C Zero Drift Bi directional Power Monitoring Module
Feel free to ask questions, share tips or report issues.
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Discover More In:

Breakout Boards → Level Shifter, DAC, ADC →

Category: View similar items (CJMCU-219)

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