INA219 DC Current Voltage Power Monitor Sensor Module – I2C

INA219 DC Current and Voltage Power Monitor Module – High-Side I2C Sensor

Buy the INA219 DC Current and Voltage Power Monitor Module online in Pakistan from Robostan.pk. This high-precision digital power monitoring module is designed to measure DC voltage, current, and power consumption in electronic circuits, battery-powered devices, robotics, solar energy systems, and IoT applications.

Powered by the Texas Instruments INA219 current and power monitoring IC, this compact sensor supports high-side current measurement and communicates through an I2C digital interface. It is suitable for Arduino, ESP32, Raspberry Pi, STM32, and other compatible microcontroller platforms.

The INA219 supports DC bus voltage measurements up to 26V and can measure bidirectional current through an external shunt resistor. Common INA219 breakout modules include a 0.1-ohm shunt resistor, enabling current measurements up to approximately ±3.2A under suitable operating conditions.

Key Features

• INA219 high-side DC current and power monitor
• Measures DC voltage, current, and calculated power
• Supports DC bus voltage measurement from 0V to 26V
• Typical current measurement range of ±3.2A with a 0.1-ohm shunt
• Integrated 12-bit ADC for digital measurement
• High-side and bidirectional current sensing
• I2C and SMBus-compatible communication
• Compatible with 3.3V and 5V supply systems
• Integrated programmable gain amplifier
• Configurable conversion timing and averaging
• Programmable calibration registers
• 16 programmable I2C addresses supported by the sensor IC
• Low power consumption
• Compact PCB design for easy integration
• Ideal for Arduino, Raspberry Pi, and IoT applications

Technical Specifications

• Product Name: INA219 Current Voltage Power Monitor Module
• Sensor IC: INA219
• IC Manufacturer: Texas Instruments
• Sensor Type: Digital DC Current and Power Monitor
• Measurement Method: High-Side Shunt Sensing
• Bus Voltage Range: 0V to 26V DC
• Sensor Supply Voltage: 3V to 5.5V DC
• Typical Shunt Resistor: 0.1 Ohm
• Typical Current Measurement: Up to ±3.2A
• Maximum Shunt Voltage Range: ±320mV
• ADC Resolution: 12-Bit
• Communication: I2C / SMBus
• Typical Default I2C Address: 0x40
• Programmable Addresses: Up to 16 at IC Level
• Measured Parameters: Bus Voltage, Shunt Voltage, Current, Power
• Current Direction: Bidirectional
• IC Operating Temperature: -40°C to +125°C
• Module Type: PCB Breakout Sensor

Applications

• Arduino voltage and current monitoring
• Raspberry Pi power monitoring projects
• Battery voltage and current measurement
• Solar panel power monitoring
• DC power supply testing
• Energy consumption monitoring
• Robotics and automation systems
• ESP32 IoT energy monitoring projects
• DC motor current measurement
• Embedded electronics development
• Battery discharge monitoring
• Smart energy measurement systems
• Portable electronic device testing
• Educational electronics projects

High-Side Current Measurement

The INA219 High-Side Current Sensor measures current by monitoring the small voltage drop across a shunt resistor connected in series with the positive supply line.

Unlike conventional low-side current sensing, high-side measurement allows the load to maintain its normal ground connection.

This makes the INA219 especially useful for monitoring power consumption in DC circuits without introducing a measurement resistor into the load's ground return path.

Voltage, Current and Power Monitoring

The INA219 provides three important measurements for electronic power monitoring applications:

• Voltage Measurement: Measures DC bus voltage up to 26V.
• Current Measurement: Measures current flowing through the connected shunt resistor.
• Power Measurement: Calculates electrical power using calibrated current and voltage measurement data.

These measurements can be read digitally through the I2C interface and displayed on an LCD, OLED, computer serial monitor, or compatible IoT dashboard.

Arduino and Raspberry Pi Compatibility

The INA219 I2C Sensor Module can communicate with Arduino, Raspberry Pi, ESP32, STM32, and other compatible controllers using its SDA and SCL connections.

Compatible software libraries simplify access to bus voltage, current, and power measurements.

For Raspberry Pi and ESP32 connections, ensure the I2C pull-up voltage is compatible with the controller's 3.3V GPIO logic.

Typical INA219 Module Pinout

• VCC: Sensor power supply
• GND: Ground connection
• SDA: I2C data line
• SCL: I2C clock line
• VIN+: High-side shunt input from DC supply
• VIN-: High-side shunt output toward the load

Some breakout versions include additional address selection jumpers or connection points. Check the markings on your particular module before wiring.

INA219 vs ACS712 Current Sensor

The INA219 and ACS712 are both used for current measurement, but they operate differently.

• INA219: Digital I2C module for DC current, bus voltage, and power monitoring using a shunt resistor.
• ACS712: Hall-effect current sensor with analog output, available in multiple current ranges and suitable for AC or DC current sensing with appropriate signal processing.

The INA219 is especially convenient when digital voltage, current, and power readings are required in a single module.

Why Choose INA219?

Multiple Measurements: Monitor DC voltage, current, and calculated power using one module.

Digital Communication: I2C provides straightforward integration with compatible controllers.

High-Side Monitoring: Allows current measurement without placing the shunt in the ground return connection.

Programmable Settings: Adjustable gain, conversion time, and calibration support different monitoring requirements.

Compact Design: Suitable for portable electronics, robotics, and embedded monitoring projects.

Important Usage Notes

• The INA219 is designed for DC power monitoring, not direct AC mains measurement.
• Do not exceed the 26V bus voltage measurement limit.
• The current limit depends on the installed shunt resistor and its power rating.
• Check the shunt resistor and module PCB current rating before measuring high currents.
• The module does not provide galvanic isolation.
• Ensure I2C signal voltages are compatible with the connected controller.
• Verify module pin markings before applying power.
• Current and power calculations require appropriate calibration settings.
• Protect the sensor against voltage spikes and incorrect polarity.

Buy INA219 Current and Voltage Sensor in Pakistan

Looking for an INA219 DC Current Voltage Power Monitor Module in Pakistan? Shop online at Robostan.pk for current sensors, voltage monitoring modules, Arduino boards, ESP32 controllers, Raspberry Pi accessories, and electronic components.

The INA219 is a practical choice for students, engineers, electronics technicians, and IoT developers building battery monitoring, power measurement, and energy management projects.

Order your INA219 I2C Power Monitor Module from Robostan.pk with nationwide delivery across Pakistan, including Lahore, Karachi, Islamabad, Rawalpindi, Faisalabad, Multan, Peshawar, and other cities.

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