Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Brand	TELESKY
Model Number	ACS712-20A
Current Range	-20A to +20A
Sensitivity	100mV/A
Operating Voltage	5V DC
Output Type	Analog Voltage
Bandwidth	80kHz
Isolation	Galvanic Isolation
Package Type	Module with Header Pins
Application	Arduino, Raspberry Pi, Motor Control

6 reviews

Anonymous

Mar 14, 2026

Rating: 5/5

Compact and reliable

Small footprint makes it easy to integrate into tight spaces. The screw terminals are secure and the pinout is clearly marked on the PCB. Highly recommended for DIY electronics.

Anonymous

Mar 10, 2026

Rating: 5/5

Works well for low voltage DC

Using it to measure current from a small solar panel setup. The 20A range is perfect for my needs, and the zero-point offset is consistent. Very satisfied with the purchase.

Anonymous

Mar 10, 2026

Rating: 4/5

Great for learning

Bought this for a university project on power monitoring. Documentation online is plentiful, making it easy to get started. Only wish it came with a datasheet in the box.

Anonymous

Mar 05, 2026

Rating: 5/5

Perfect for Arduino projects

This sensor works flawlessly with my Arduino Uno. The output is stable and the calibration was straightforward using the provided formula. Great value for the price.

Anonymous

Mar 02, 2026

Rating: 4/5

Good accuracy, needs filtering

The module detects current accurately within the specified range. I noticed some noise in the reading, but adding a simple capacitor filter solved it immediately. Solid build quality.

Anonymous

Mar 01, 2026

Rating: 5/5

Essential for motor monitoring

I am using this to monitor the current draw of a DC motor in my robot. It handles the spikes well and the galvanic isolation gives me peace of mind regarding my microcontroller safety.

5 FAQ

Q: How do I calibrate the zero-current voltage?

A: With no current flowing, the output should be VCC/2 (approximately 2.5V). You can read this value in your code and subtract it from subsequent readings to get the net current value.

Q: What is the exact sensitivity for the 20A version?

A: The sensitivity for the 20A range model is typically 100mV per Ampere. This means for every 1A of current, the output voltage changes by 0.1V relative to the zero point.

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

A: Yes, the ACS712 chip inside can measure both AC and DC current. For AC, you will need to process the analog signal to calculate the RMS value in your code.

Q: Does the package include connecting wires?

A: No, the package includes only the sensor module with header pins installed. You will need to provide your own jumper wires or solder connections separately.

Q: Is this compatible with 3.3V logic boards like ESP32?

A: The module operates on 5V, but the analog output is generally compatible with 3.3V ADC inputs. However, ensure your board's ADC can handle the full 0-5V swing or use a voltage divider if necessary.

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