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ACS712 Current Sensor- 5A
The ACS712 Current Sensor (5A) provides a simple way to measure AC or DC current up to ±5A. Based on the Allegro ACS712 Hall effect sensor, this module outpu...
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The ACS712 Current Sensor (5A) provides a simple way to measure AC or DC current up to ±5A. Based on the Allegro ACS712 Hall effect sensor, this module outputs a proportional analogue voltage that can be read directly by an Arduino or other microcontroller via an analogue input pin.
With its low-resistance current path and electrical isolation, the ACS712 is well suited for over-current protection circuits, battery chargers, switching-mode power supplies, digital watt meters, and programmable current sources.
Key Features
- ±5A Measurement Range – Detects both AC and DC current up to 5A
- Analogue Output – 185 mV/A sensitivity for straightforward ADC readings
- Hall Effect Sensing – Non-intrusive measurement with electrical isolation
- Low Resistance – Minimal impact on the circuit being measured
- 5V Compatible – Operates from 4.5V to 5.5V supply
Specifications
- Supply Voltage: 4.5V – 5.5V DC
- Measurement Range: -5A to +5A
- Sensitivity: 180 – 190 mV/A (typical 185 mV/A)
- Sensor IC: ACS712ELCTR-05B-T
Also Available
- ACS712 Current Sensor – 20A
- ACS711EX Current Sensor Carrier – ±31A
- ACS714 Current Sensor Carrier – ±5A
- ACS724 Current Sensor Carrier – ±50A
- SparkFun Low Current Sensor Breakout – ACS712
Ideal For
- Over-current protection circuits
- Battery chargers and monitoring systems
- Digital watt meters and power monitors
- Switching-mode power supply feedback
- Arduino and microcontroller current sensing projects
Package Contents
- 1× ACS712 Current Sensor Module (5A)
Jargon buster
Plain-language definitions for the technical terms used above.
- ADC
- An analogue-to-digital converter reads a changing voltage and turns it into a number the microcontroller can use. It matters when connecting analogue sensors such as light, sound, or variable-resistor sensors.
- DC
- DC means direct current, where electricity flows in one constant direction, as supplied by batteries, USB ports and many plug-pack power supplies. When a product specifies DC, it runs from a DC supply rather than mains AC, so you need to provide the correct voltage and polarity.
- microcontroller
- A microcontroller is a small computer on a single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
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