ACS712 30A Hall Current Detection Module for Arduino
= High-Precision Current Sensor for Arduino Projects =
The ACS712 30A module provides accurate current measurement using Hall effect technology, ideal for DC and AC current monitoring in Arduino projects.
Wide 30A Range - Measures both positive and negative currents up to ±30A
High Sensitivity - 66mV/A analog output for precise readings
Operates on 5V power supply with onboard indicator LED
Output voltage is VCC/2 (2.5V) when no current flows
Protect from external magnetic fields for accurate readings
= Technical Specifications =
| Parameter | Value |
|---|
| Chip | ACS712ELC-30A |
| Current Range | ±30A |
| Sensitivity | 66mV/A |
| Supply Voltage | 5V |
| Output Type | Analog (VCC/2 at zero current) |
| Bandwidth | 80kHz |
| Isolation Voltage | 2.1kV RMS |
= Key Features =
Hall Effect Based - Galvanic isolation for safety
Low Noise Output - Stable readings with filtering
Factory Trimmed Accurate outof-box performance
Compact Module - Easy breadboard integration
== Applications ==
- Motor current monitoring
- Battery charging systems
- Power supply protection
- Overcurrent detection
- Load sensing and management
Reliable AC/DC Sensing - Works with both current types
Arduino Compatible Simple 3wire connection
√ Includes screw terminals for easy wiring
√ LED indicator for power status
√ Ready for prototyping
= Connection Guide =
Module connections:
- VCC: 5V from Arduino
- GND: Ground
- OUT: Analog pin (A0)
Connect VCC to Arduino 5V pin
Use ADC pin for reading output voltage
Do not exceed 30A continuous
Keep sensor away from strong magnets
= Reading Current =
Arduino analog conversion:
- Read analog value on A0
- Subtract zero offset (512 typical)
- Divide by sensitivity (13.6 for 30A version)
| Formula | Current(A) = (ADC reading - 512) / 13.6 |
Simple Calculation - Easy integration into projects
Realtime Monitoring Continuous current tracking
Accurate to 1.5% at room temperature
Used in overcurrent protection systems
√ Available in bulk packs for multiple projects
√ RoHS compliant component
= Troubleshooting =
No output:
- Check 5V power connection
- Verify OUT pin connection
- Avoid loose wiring
Inconsistent readings:
- Add capacitor for noise filtering
- Shield from magnetic interference
- Avoid sharing power with motors
