A3144 Hall effect Sensor

3 January 2018 - 0 Comments

3144 Hall Effect Sensor

A3144 Hall effect Sensor Pinout

Pin Configuration

No:	Pin Name	Description
1	+5V (Vcc)	Used to power the hall sensor, typically +5V is used
2	Ground	Connect to the ground of the circuit
3	Output	This pin goes high, if magnet detected. Output voltage is equal to Operating voltage.

Hall-effect sensor Specifications

Digital Output Hall-effect sensor
Operating voltage: 4.5V to 28V (typically 5V)
Output Current: 25mA
Can be used to detect both the poles of a magnet
Output voltage is equal to operating voltage
Operating temperature: -40°C to 85°C
Turn on and Turn off time is 2uS each
Inbuilt reverse polarity protection
Suitable for Automotive and Industrial Applications

注意:要知道为什么这些参数是很重要的ead further. Also theA3144 hall effect sensor datasheetcan be found at the bottom of the page

Alternative Digital Hall-effect Sensors

A3141, A3142, A3143, US1881, OH090U

Other Analog Hall-effect Sensors

A1321, A1302, SS495B, ASC712

Where to use hall-effect sensor

Ahall-effect sensoras the name suggests works with the principle of hall-effect and is used to detect magnets. Each side of the sensor can detect one particular pole. It can also be easily interfaced with amicrocontrollersince it works on transistor logic.

So if you are looking for a sensor to detect magnet for measuring speed of a moving object or just to detect objects then this sensor might be the perfect choice for your project.

How to use Hall-effect sensor

There aretwo main types of hall-effect sensor, one which gives an analog output and the other which gives a digital output.A3144is a digital output hall sensor, meaning if it detects a magnet the output will go low else the output will remain high. It is also mandatory to use a pull-up resistor as shown below to keep the output high when no magnet is detected.

Circuit using A3144 Hall effect Sensor

In the above circuit diagram the resistor R1 (10K) is used as a pull-up resistor and the capacitor C1 (0.1uF) is used to filter any noise that might be coupled with the digital output.