Hall Magnetic Sensor

The Hall Magnetic Sensor project showcases how to use an Arduino Nano to detect a magnetic field with a Hall sensor. This project will light up an LED when a magnetic field is detected. It is useful for applications in security systems, contactless switches, and magnetic field detection.

Components Needed

Circuit Diagram

Circuit Setup

1.Connect Hall Magnetic Sensor to Arduino Nano:

Connect the Vcc pin of the Hall sensor to the 5V pin on the Arduino Nano.

Connect the GND pin of the Hall sensor to the GND pin on the Arduino Nano.

Connect the output pin of the Hall sensor to digital pin 2 on the Arduino Nano.

Connect LED to Arduino Nano (Optional):

If using an external LED, connect the anode (long leg) of the LED to digital pin 13 on the Arduino Nano through a 220Ω resistor.

Connect the cathode (short leg) of the LED to the GND pin on the Arduino Nano.

Instructions

1.Circuit Setup:

Wire the Hall magnetic sensor and the LED to the Arduino Nano as described in the circuit setup section.

2.Code Upload:

Connect the Arduino Nano to your computer using a USB cable.

Open the Arduino IDE and paste the provided code.

Select the appropriate board (Arduino Nano) and port from the Tools menu.

Upload the code to the Arduino Nano.

3.Testing:

Once the code is uploaded, bring a magnet near the Hall sensor.

Observe the LED lighting up and the sensor values printed on the Serial Monitor.

Applications

Security Systems: Detect if a door or window is opened or closed.

Contactless Switches: Use magnetic fields to trigger switches without physical contact.

Magnetic Field Detection: Measure the presence and strength of magnetic fields.

Notes

Ensure the correct orientation and connection of the Hall sensor and LED to prevent damage.

Adjust the delay in the code if you need a faster or slower response time.

Use appropriate resistors to protect the LED from excessive current.