Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Brand	TELESKY
Model Number	3144 Hall Effect Sensor
Operating Voltage	3.3V - 5V DC
Output Type	Digital Switching Output
Sensing Element	Allegro A3144 Equivalent
Detection Object	Magnetic Fields (North/South Pole)
Indicator	Green LED Power, Red LED Signal
Mounting Hole Diameter	3mm
PCB Dimensions	32mm x 14mm
Application	Speed Measurement, Counting, Position Detection

6 reviews

Anonymous

Mar 25, 2026

Rating: 5/5

Perfect for RPM projects

Used this module to build a tachometer for my 3D printer fan. The response time is incredibly fast and the output is clean. Easy to wire up to an Arduino Uno.

Anonymous

Mar 24, 2026

Rating: 5/5

Exactly what I needed

Replaced a faulty sensor in my old bicycle speedometer setup. This TELESKY module fit perfectly and calibrated instantly. Very happy with the purchase.

Anonymous

Mar 19, 2026

Rating: 4/5

Good value, works as expected

The sensor detects magnets reliably. The only minor issue is that the mounting holes are slightly tight for M3 screws, but nothing a drill bit can't fix.

Anonymous

Mar 13, 2026

Rating: 4/5

Solid component for learning

Bought this for a university project on magnetic fields. Documentation could be better, but standard 3144 datasheets work perfectly with it.

Anonymous

Mar 12, 2026

Rating: 5/5

Great sensitivity

The detection range is surprisingly good. It picks up small neodymium magnets from about 1cm away. The LED indicators are very helpful for debugging.

Anonymous

Mar 08, 2026

Rating: 5/5

Reliable counting sensor

I am using this to count rotations on a motor shaft. It has been running for 48 hours straight without missing a pulse. Highly recommended for automation projects.

5 FAQ

Q: What is the operating temperature range?

A: The module is designed to operate safely between -40°C and +85°C, making it suitable for most indoor and protected outdoor applications.

Q: Can this detect both North and South poles?

A: The standard A3144 chip usually responds to one specific pole (typically South). Please check the specific orientation marked on the chip or test with a magnet to confirm polarity sensitivity.

Q: Is there a potentiometer to adjust sensitivity?

A: No, this specific 3144 model does not have an adjustable potentiometer. The switching threshold is fixed by the internal hall effect IC design.

Q: What is the maximum current this sensor can switch?

A: The onboard comparator can typically handle up to 20mA. For driving higher loads like relays or motors, we recommend using a transistor or MOSFET driver circuit.

Q: Does this module output analog or digital signals?

A: This module outputs a digital signal (HIGH/LOW) based on the presence of a magnetic field. It is not an analog linear sensor.

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