The ACS712-5A Hall Effect Current Sensor is a sophisticated, non-invasive solution for measuring both AC and DC current. At Electrapac, we recommend this module for makers and engineers in Bangladesh who are building digital ammeters, solar charge controllers, or smart energy monitors with Arduino and ESP32.

Unlike standard shunt resistors, the ACS712 uses a Hall Effect sensor to detect the magnetic field generated by flowing electrons. This provides 2.1kV RMS electrical isolation, meaning your sensitive 5V Arduino is physically separated from the high-voltage circuit you are measuring. The 5A version is highly precise, offering a sensitivity of 185mV per Ampere, making it ideal for low-to-medium power electronics.

Key Features for Electrapac Customers

• AC and DC Measurement: Capable of measuring direct current (DC) from batteries and alternating current (AC) from household mains with the same hardware.

• Low Noise Path: Features an internal filter pin that can be used to reduce electrical noise, ensuring stable readings for sensitive IoT applications.

• Bi-Directional Sensing: Can measure current flowing in both directions—perfect for monitoring both the charging and discharging of a battery.

• Minimal Power Loss: The internal copper conduction path has extremely low resistance (1.2 mΩ), so the sensor won't heat up or waste energy in your circuit.

• Factory Calibrated: Every ACS712 chip is calibrated at the factory to provide a precise linear output proportional to the current.

To get accurate results from your Electrapac ACS712 module, follow these essential steps:

1. VCC/GND: Connect to 5V and Ground.

2. OUT: Connect to an Analog Pin (e.g., A0).

3. The Zero Point: At 0A (no current), the module outputs exactly 2.5V (half of VCC).

   • If the current is positive, the voltage rises above 2.5V.

   • If the current is negative, the voltage drops below 2.5V.

4. The Load: Connect the high-current wire in series with your device using the green screw terminals.

Pro-Tip: Magnetic fields can affect Hall Effect sensors. Avoid placing the ACS712 directly next to large transformers or powerful DC motors, as their magnetic interference might cause "ghost" readings in your code.

• DIY Digital Ammeters: Creating a real-time display of current usage for lab power supplies.

• Solar Energy Tracking: Monitoring how many Amps your solar panel is pushing into a 12V battery.

• Battery Capacity Testers: Calculating the "health" of a battery by measuring its discharge rate over time.

• Fault Detection: Automatically cutting power (via a relay) if a motor draws more than its rated 5A current.

• Smart Home IoT: Sending appliance energy consumption data to a smartphone via WiFi.

We source our ACS712-5A Modules with high-quality screw terminals and thick copper traces to ensure the board can handle a continuous 5A load without overheating. Visit us at www.electrapac.com for the power-sensing components that give you total control over your electricity.