This is a bi-directional measuring device and therefore this can be used for both AC and DC current sensing. The ACS712 sensor is designed for three current ranges 5A, 20A and 30A. The sensor consists of an integrated circuit which works according to the Hall-effect principal. This IC generates a voltage proportional to the current flowing in the circuit. Breakout board of current sensors based on this device also available in the market and they make your life easier.
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