30A ACS712 Current Sensor
30A ACS712 Current Sensor Module
Hall-Effect Current Sensor AC/DC Measurement Electrical Monitoring
The ACS712 30A Current Sensor Module is a compact module designed to measure AC and DC current up to 30A. It is based on the Allegro ACS712 Hall'Effect Current Sensor, which uses the Hall effect principle to measure current flowing through a conductor.
Unlike traditional current measurement methods, this sensor provides electrical isolation between the high-current circuit and the microcontroller, making it safe and reliable for power monitoring and smart energy systems.
Infographic Overview
Basic Specifications
Feature | Details | ||
Current Range | 30A | ||
Operating Voltage | 5V | Sensitivity | ~66 mV/A |
Isolation | Hall-effect isolation | ||
Current Type | AC and DC |
Main Components
Component | Description |
ACS712 Sensor Chip | Measures current using Hall effect |
High Current Terminals | Input and output current path |
Analog Output Pin | Sends current measurement signal |
Signal Conditioning Circuit | Stabilizes sensor output |
Pin Configuration
Pin | Function |
VCC | Power supply (5V) |
GND | Ground |
OUT Working Principle The sensor works based on the **Hall Effect. Step-by-Step Operation 1 Current flows through the internal conductor.2 The current creates a magnetic field around the conductor.3 The Hall sensor detects the magnetic field strength.4 The module converts this into a proportional analog voltage output.5 A microcontroller reads the voltage and calculates the current value. Sensor Working Diagram Load Device'Current Flow'ACS712 Sensor(Hall Effect) Smart home energy meters Battery charging systems Overcurrent protection circuits Industrial current monitoring Compatible Microcontrollers The module easily interfaces with:
ACS712 Variants Comparison Advantages Measures AC and DC current Electrical isolatioitable for energy monitoring systems Limitations Sensitive to electrical noise Requires calibration for precise readings Accuracy decreases at very high currents Example DIY Project Smart Energy Monitoring System Components
Working Current sensor measures current flow Voltage sensor measures AC voltage Arduino |
Terminal | Function |
IP+ | Current input |
IP | Current output |
Model | Current Range | Sensitivity |
ACS712-05A | 5A | 185 mV/A |
ACS712-20A | 20A | 100 mV/A |
ACS712-30A | 30A | 66 mV/A |