The 5A range Current Sensor Module ACS712 consists of a precise, low-offset, linear Hall
circuit with a copper conduction path located near the surface of the die. Applied current
flowing through this copper conduction path generates a magnetic field in which the Hall IC
converts into a proportional voltage.
Sensing and controlling current flow is a fundamental requirement in a wide variety of
applications including, over-current protection circuits, battery chargers, switching mode
power supplies, digital watt meters, programmable current sources, etc.
This ACS721 current module is based on the ACS712 sensor, which can accurately detect AC or
DC current.
The maximum AC or DC that can be detected can reach 5A, and the present current signal can
be read via analog I / O port of Arduino