Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Model Number	ACS712
Sensor Type	Hall Effect Current Sensor
Available Ranges	5A, 20A, 30A
Operating Voltage	5V DC
Output Sensitivity (5A)	185 mV/A
Output Sensitivity (20A)	100 mV/A
Output Sensitivity (30A)	66 mV/A
Bandwidth	80 kHz
Response Time	5 µs
Interface	Analog Output

6 reviews

Anonymous

Mar 26, 2026

Rating: 5/5

Bulk purchase success

Ordered ten units for our makerspace workshop. All of them worked out of the box. Students found them easy to wire up and start coding immediately. Will buy again.

Anonymous

Mar 23, 2026

Rating: 5/5

Perfect for Arduino Projects

This sensor module works flawlessly with my Arduino Uno. The readings are stable and the calibration was straightforward using the provided library examples. Great value for the price.

Anonymous

Mar 12, 2026

Rating: 5/5

Compact and Reliable

I used the 20A version for a robotic arm motor driver. It fits perfectly in tight spaces and provides real-time current feedback without any lag. Highly recommended for robotics applications.

Anonymous

Mar 12, 2026

Rating: 5/5

Essential for Solar Monitoring

Using this to monitor the output of my small solar panel setup. The isolation provided by the Hall effect technology gives me peace of mind. Easy to integrate with ESP32.

Anonymous

Mar 11, 2026

Rating: 4/5

Great for learning

Bought this for my university embedded systems course. It helped me understand how current sensing works practically. The documentation online is plentiful which helped a lot.

Anonymous

Mar 08, 2026

Rating: 4/5

Good accuracy, needs filtering

The sensor is accurate enough for my home energy monitor project. I did have to add some software filtering to smooth out the noise, but that is expected with analog sensors. Solid build quality.

5 FAQ

Q: What is the maximum voltage this module can handle on the input side?

A: The module itself measures current, not voltage. However, the primary conductor path is isolated. Please refer to the specific datasheet for isolation voltage ratings, typically around 2.1kV RMS, but ensure your circuit voltage does not exceed safe limits for your PCB traces.

Q: How do I calibrate the zero-point offset?

A: With no current flowing through the sensor, measure the output voltage. It should be approximately half of your supply voltage (e.g., 2.5V for a 5V supply). Use this value as your 'zero' baseline in your code and subtract it from future readings to calculate the actual current.

Q: Can this sensor measure AC current as well as DC?

A: Yes, the ACS712 module can measure both AC and DC current. The output voltage will vary around the VCC/2 baseline depending on the direction and magnitude of the current flow.

Q: Does this come with screw terminals or do I need to solder wires?

A: This specific LSSZ board features heavy-duty copper pads for high-current connections. While you can solder wires directly, we recommend using high-temperature solder and thick gauge wire. Some variants may include screw terminals, so please check the product images carefully before ordering.

Q: Is there a library available for Raspberry Pi?

A: Since this is an analog sensor, it cannot connect directly to the GPIO pins of a standard Raspberry Pi which are digital. You will need an external ADC (Analog-to-Digital Converter) like the MCP3008. Once connected via SPI, you can use standard Python libraries to read the data.

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