ACS712 30A Current Sensor Module – AC/DC Current Measurement for Arduino
Product Description
The ACS712 30A Current Sensor Module is an electronic current measurement module designed to measure AC or DC current using Hall-effect sensing technology. It uses an ACS712 current sensor IC with an integrated copper conduction path to detect the magnetic field generated by current flow and convert it into a proportional analog voltage output.
The module allows a compatible microcontroller to monitor current through an analog input, making it useful for battery monitoring, motor control, power supply testing and overcurrent monitoring projects.
With a nominal current measurement range of up to ±30A for the appropriate ACS712 variant, this module is suitable for many DIY electronics, embedded systems and automation applications. Its analog output can be processed by Arduino and other compatible development boards to estimate current flow.
Key Features
30A Current Sensing: Designed for measuring AC or DC current within the sensor's specified range.
Hall-Effect Technology: Measures current without directly exposing the sensing electronics to the current-carrying conductor.
Analog Voltage Output: Provides a current-dependent voltage for microcontroller ADC measurement.
ACS712 Sensor IC: Uses Hall-effect current sensing technology.
5V Operation: The ACS712 IC is designed for a nominal 5V supply.
Low-Noise Signal Path: Designed to provide a usable analog output for current measurement.
Fast Response: Sensor response time is suitable for many current monitoring applications.
Microcontroller Integration: Suitable for compatible Arduino and other ADC-equipped development boards.
Versatile Applications: Useful for motor monitoring, battery systems, power supplies and electronic experiments.
Technical Specifications
Parameter | Specification |
Product Name | ACS712 30A Current Sensor Module |
Sensor IC | ACS712 |
Sensing Technology | Hall effect |
Current Type | AC and DC |
Nominal Measurement Range | Up to ±30A for the 30A variant |
Output Type | Analog voltage |
Supply Voltage | Nominally 5V DC |
Sensitivity | Approximately 66 mV/A for the ACS712 30A variant |
Output Characteristic | Ratiometric to supply voltage |
Interface | Analog output |
Compatible Platforms | Arduino and other compatible microcontrollers |
Typical Applications | Current monitoring, motor control, power measurement |
Applications
AC and DC current measurement
Battery and charging system monitoring
DC motor current monitoring
Power supply testing
Overcurrent detection prototypes
Switching power supply experiments
Digital wattmeter projects
Programmable current source monitoring
Arduino electronics projects
Embedded system diagnostics
Package Includes
1 × ACS712 30A Current Sensor Module
Important Notes
Verify the exact variant: The ACS712 family includes multiple current ranges. Confirm that your module uses the 30A version before publishing the range and sensitivity.
Analog output: The output typically sits near half the supply voltage at zero current. Current is calculated from the difference between the measured output and the zero-current offset.
ADC compatibility: The module is designed for 5V operation. Check the analog output voltage before connecting it to a 3.3V ESP32 ADC input.
Measurement accuracy: ADC resolution, noise, calibration, temperature and PCB design can affect the measured current.
Current rating and heating: Ensure the module's PCB terminals, copper path, wiring and connectors can safely handle the intended current.
Electrical safety: Although the sensor IC provides isolation between the current path and signal pins under specified conditions, the complete module is not automatically certified for safe mains-voltage measurement. Use suitable protection and safe wiring practices.
The ACS712 30A Current Sensor Module is a practical choice for makers, students and developers building current monitoring and power measurement projects.
