30A ACS712 Current Sensor

The 30A ACS712 Current Sensor consists of a precise, low-offset, linearHall circuitwith 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 ICconverts 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.

Connection Diagram of Arduino Uno withCurrent Sensor :

Fig:Connection ofACS712 Current Sensor with Arduino UNO

Curve of relation between the DC input voltage and measuring current:

Fig: Output Voltage vs. Sensed Voltage