How to use the ACS712 Module
As told earlier it is very simple to interface the ACS712 Module with Microcontrollers. The below diagram would be more illustrative
The ACS712 module has two phoenix terminal connectors (green colour ones) with mounting screws as shown above. These are the terminals through which the wire has to be passed. In our case I am measuring the current drawn by the motor so the wires that is going to the load (motor) is passed through the ACS 712 Module. Make sure the module is connected in series with the load and be extra cautious to avoid shorts.
On the other side we have three pins. The Vcc is connected to +5V to power the module and the ground is connected to the ground of the MCU (system). Then the analog voltage given out by the ACS712 module is read using any analog pin on the Microcontroller.
Pin Configuration
Pin Number
Pin Name
Description
1
Vcc
Input voltage is +5V for typical applications
2
Output
Outputs Analog voltage proportional to current
3
Ground
Connected to ground of circuit
T1
Wire In
The wire through current has to be measured is connected here
T2
Wire Out
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