ACS712 5A Hall Current Detection Module for Arduino
High-Precision Current Sensor for Arduino Projects
The ACS712 5A module provides accurate current measurement using Hall effect technology, ideal for DC and AC current monitoring in Arduino projects.
Precision 5A Range - Measures positive and negative currents up to ±5A
High Sensitivity 185mV/A analog output for precise lowcurrent 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-05B |
| Current Range | ±5A |
| Sensitivity | 185mV/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
High Sensitivity Ideal for lowcurrent monitoring
Factory Trimmed Accurate outof-box performance
Compact Module - Easy breadboard integration
Low Noise - Stable analog output
= Applications =
- Low-power device monitoring
- Battery charging systems
- Solar panel current tracking
- Overcurrent protection
- Power consumption analysis
- Sensor load monitoring
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 5A 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 (27 for 5A version)
Formula: Current(A) = (ADC reading - 512) / 27
Simple Calculation - Easy integration into projects
Realtime Monitoring Continuous current tracking
Accurate to 1.5% at room temperature
Used in precision measurement systems
√ Available in bulk packs
√ 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