The GY-471 MAX471 Current Sensor Module delivers laboratory-grade current measurement for Arduino, Raspberry Pi, and embedded systems. Built around the MAX471 IC from Analog Devices, this module provides high-side current sensing that monitors circuits without disrupting ground paths, making it ideal for battery management systems, power monitoring, and IoT applications.
๐ฌ Advanced High-Side Current Sensing Technology
The MAX471 IC features sophisticated high-side current sensing technology that integrates seamlessly into power distribution networks. Unlike low-side sensors that interfere with system grounding, this module monitors current flow while preserving critical ground pathsโessential for battery-powered systems and sensitive electronic applications.
Key Technical Specifications:
- ๐ Current Range: ยฑ3A bidirectional measurement
- โก Supply Voltage: 3V to 36V DC (universal compatibility)
- ๐ฏ Accuracy: ยฑ2% over temperature range
- ๐ Sensitivity: 1V per ampere output
- ๐ Power Consumption: <100ยตA
- ๐ Compact Size: 19.5mm ร 20.3mm PCB footprint
๐ Revolutionary Features
Bidirectional Current Detection
Monitor both charging and discharging currents with automatic direction sensing. The integrated SIGN pin provides real-time indication of current flow directionโessential for battery management, solar panel monitoring, and power flow analysis.
Precision Internal Shunt Resistor
The factory-calibrated 35mฮฉ internal shunt eliminates external current sensing resistors, reducing component count and improving reliability. This precision element ensures consistent performance across temperature variations.
Universal Voltage Compatibility
From 3V microcontroller projects to 36V industrial applications, the GY-471 adapts to your power requirements. This wide voltage range supports automotive electronics, industrial automation, and renewable energy systems.
Plug-and-Play Arduino Integration
Simple analog output interface connects directly to any microcontroller ADC input. No complex I2C protocolsโjust straightforward voltage readings that translate directly to current measurements.
๐ก Applications
๐ Smart Battery Management
- Monitor charging/discharging cycles in real-time
- Implement intelligent power cutoff systems
- Track battery health and performance metrics
- Create smart charging stations with current feedback
๐ IoT Energy Monitoring
- Build smart home energy meters
- Monitor appliance power consumption
- Create energy-efficient automation systems
- Develop solar panel performance trackers
๐ง Industrial & Automation
- Motor current monitoring and protection
- Power supply quality assessment
- Process control feedback systems
- Equipment health monitoring
๐ Engineer-Friendly Design
Robust Construction
High-quality PCB with gold-plated contacts ensures long-term reliability and excellent electrical connectivity. The compact form factor fits easily into tight spaces while maintaining professional-grade performance.
Thermal Management
Intelligent thermal design with adequate copper area ensures stable operation under continuous 3A load conditions. Built-in thermal protection prevents damage from overcurrent conditions.
Direction Sensing Intelligence
The open-collector SIGN output interfaces with 3.3V and 5V logic systems, providing reliable current direction indication for bidirectional applications.
๐ฏ Performance Advantages
Superior Accuracy
Laboratory testing confirms ยฑ2% accuracy over the full temperature range. With proper calibration, achieve even better precision for critical applications.
Fast Response Time
<10ยตs response time captures rapid current changes, making it suitable for dynamic load monitoring, motor control applications, and fast-switching power systems.
Temperature Stability
Engineered for reliable operation from -40ยฐC to +85ยฐC, ensuring consistent performance across diverse environmental conditions.
๐ง Simple Integration Process
Hardware Connection
- RS+ โ Connect to positive power source
- RS- โ Connect to load positive terminal
- GND โ System ground reference
- OUT โ Analog input (ADC) pin
- SIGN โ Digital input (optional direction sensing)
Software Implementation
// Simple current measurement
float current = analogRead(A0) * (5.0/1024.0); // Direct 1V/A conversion๐ Complete Package Contents
- 1x GY-471 MAX471 Current Sensor Module
- Pre-soldered pin headers (ready to use)
- Technical documentation with wiring diagrams
- Arduino code examples for immediate implementation
- Calibration guidelines for precision applications
๐ Quality Assurance & Reliability
Rigorous Testing Standards
Each module undergoes comprehensive testing including current measurement accuracy validation, temperature cycling tests, voltage range verification, and long-term stability assessment.
Professional Grade Components
- Genuine MAX471 IC
- High-quality PCB with professional solder mask
- Precision passive components
- RoHS compliant materials
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