ACS712 20 A Hall-Effect Current Sensor Module – AC/DC Measurement

The integrated linear Hall sensor detects the magnetic field generated by current flowing through its copper conductor and converts it into a proportional analog output voltage.

Thanks to its accuracy, low noise and easy-to-read analog output, the module is well suited for measuring current drawn by motors, power supplies, batteries and solar systems, as well as overload detection in microcontroller applications.

🔧 Technical specifications:

• IC: ACS712ELC-20A (Allegro MicroSystems)

• Measurement range: ±20 A (AC alebo DC)

• Sensitivity: 100 mV/A

• Zero-current output voltage: 2.5 V (pri 0 A)

• Supply voltage: DC 5 V

• Output: Analog voltage (0–5 V range)

• Calculation formula: VOUT = 2.5 + 0.100 × IP (IP in amperes)

• Galvanic isolation: Yes (Hall effect)

• Integrated circuits: amplification, filtering and correction

• Power indicator: Yes (LED)

• Interface: 3 pins (VCC, OUT, GND), screw terminals for the measured current

📦 Applications:

• Current measurement for motors, LED strips and solar panels

• Smart energy monitoring with Arduino/ESP32

• Overvoltage/protection indication

• Power supply and power-module solutions

🧑‍💻 Example wiring and Arduino code will be added soon.