INA219 Bi-Direction DC Power Supply Sensor GY-219 Module
The INA219 Bi-Direction DC Power Supply Sensor GY-219 Module is an advanced current and power monitoring module designed for precise measurement of voltage, current, and power in DC circuits. Built around the INA219 sensor IC from Texas Instruments, this module supports bi-directional current sensing, allowing you to measure both charging and discharging cycles — ideal for battery-operated or solar-powered systems.
This sensor communicates via the I2C bus, making it compatible with popular microcontroller platforms like Arduino and Accessories, Raspberry Pi, and NodeMCU IoT boards. The onboard 0.1Ω precision shunt resistor allows high-accuracy current measurement up to ±3.2A with a maximum bus voltage of 26V.
⚙️ Technical Specifications
| Parameter | Specification |
|---|---|
| Operating Voltage: | 3.0V – 5.5V |
| Interface: | I2C (address configurable) |
| Bus Voltage Range: | 0V – 26V |
| Current Measurement Range: | ±3.2A |
| Power Measurement: | Up to 85W (based on configuration) |
| Shunt Resistor: | 0.1Ω precision |
| Communication Speed: | Up to 400kHz I2C |
| Chipset: | Texas Instruments INA219 |
| Dimensions: | 27mm x 26mm |
| Module Type: | GY-219 Power Monitoring Module |
⚡ Key Features
✅ High-accuracy current and power sensing
✅ Bi-directional measurement for charging/discharging systems
✅ Onboard precision 0.1Ω shunt resistor
✅ Supports 3.3V and 5V logic levels
✅ I2C interface for easy integration
✅ Perfect for battery management, solar monitoring, and robotics
✅ Compact size for embedded designs
💡 Applications
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Battery monitoring and management systems
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Solar power management and analysis
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Smart IoT energy systems
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Robotics and automation projects
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DC motor power tracking and diagnostics
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Portable device current consumption analysis
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Integration with Electronics Components for current sensing and regulation
⚠️ Precautions
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Avoid exceeding the rated 26V bus voltage to prevent IC damage.
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Ensure proper I2C address configuration when using multiple INA219 modules.
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Use twisted wires for long shunt connections to reduce noise.
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Keep the module’s power supply stable (preferably 3.3V regulated for Raspberry Pi).
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Handle the board carefully to avoid static discharge to the I2C pins.
🎥 YouTube Tutorial
Learn how to use the INA219 Power Sensor with Arduino in this step-by-step video guide:
🔗 https://www.youtube.com/watch?v=9u1Z3u6sOeU
🔗 Internal Links
🧠 Product Summary
The INA219 GY-219 Module offers reliable and precise voltage, current, and power monitoring capabilities in a compact, I2C-based design. Ideal for Arduino and Raspberry Pi enthusiasts, it’s perfect for solar power systems, battery analyzers, and IoT applications where efficiency tracking is essential. Its built-in shunt resistor, dual-direction sensing, and compatibility with 3.3V and 5V systems make it an invaluable module for engineers and hobbyists alike.
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