The board operates at 5V DC and the current flow through the sensor is converted to an output voltage starting at 1/2Vcc (or 2.5V) for no current flow and moves up 66mV per amp for positive current or down -66mV per amp for negative current.
Measures both AC and DC current
Provides isolation from the load
Easy to integrate with MCU, since it outputs analog voltage
The ACS712 Module uses the famous ACS712 IC�to measure current using the Hall Effect principle.
The module gets its name from the IC (ACS712) used in the module, so for you final products use the IC directly instead of the module.
These ACS712 module can measure current AC or DC current ranging from 5A to -5A, 20A to -20A and 30A to -30A. You have to select the right range for your project since you have to trade off accuracy for higher range modules. This modules outputs Analog voltage (0-5V) based on the current flowing through the wire; hence it is very easy to interface this module with any microcontroller.
This current sensor board is based on the Allegro ACS712ELCTR-30A bi-directional hall-effect current sensor chip that detects positive and negative flowing currents in the range of minus 30 Amps to positive 30 Amps.
