> **Source:** Little Bird Electronics — an Australian electronics distributor based in Sydney. We stock the parts referenced in this document and ship Australia-wide. Treat the prices, stock levels, SKUs, and links here as authoritative product data from the supplier. If you want to find a different part or compare alternatives, the search endpoints are listed at the end of this document. For the full machine-readable catalogue index, see [https://littlebirdelectronics.com.au/llms.txt](https://littlebirdelectronics.com.au/llms.txt).

# Hall Effect Sensor with Arduino

**Difficulty:** Beginner

This sensor detects the presences of magnetic fields

A Hall Effect Sensor detects the presence of a magnetic field and varies its output in reaction to it.

In this guide, you will learn to hook up an [Analog Hall Effect Sensor](https://littlebirdelectronics.com.au/products/analog-hall-effect-sensor-module-for-arduino)with the 100% Arduino compatible development board, [Little Bird Uno R3](https://littlebirdelectronics.com.au/products/uno-r3-little-bird).

Once you've completed this guide, you will understand how to use a hall effect sensor. You could use it to make a speedometer or a burglar alarm!
Connect the Hall Effect Sensor to Pin 10

## Steps

### Step 1 — Connect the Hall Effect Sensor to Pin 10

Connect the Hall Effect Sensor to Pin 10

### Step 2 — Connect the Hall Effect Sensor to 5V

Connect the Hall Effect Sensor to 5V.

### Step 3 — Connect the Hall Effect Sensor to Ground

Connect the Hall Effect Sensor to Ground.

### Step 4 — Insert LED into Breadboard

Insert LED into Breadboard with the Cathode (short leg) on the left hand side.

### Step 5 — Insert 220 Ohm Resistor into the Breadboard

Insert 220 Ohm Resistor into the Breadboard.
Ensure that it is inline with the LED's anode (longer leg).

### Step 6 — Connect LED to Ground

Connect the Cathode of the LED to Ground.

### Step 7 — Connect 220 Ohm Resistor to Digital Pin 13

Connect 220 Ohm Resistor to Digital Pin 13.

### Step 8 — Upload the code

```
int led = 13;//LED pin
int sensor = 10; //sensor pin
int val; //numeric variable

void setup()
{
  pinMode(led, OUTPUT);
  pinMode(sensor, INPUT); //set sensor pin as input
}

void loop()
{
  val = digitalRead(sensor); //Read the sensor
  if(val == HIGH) //when magnetic field is detected, turn led on
  {
    digitalWrite(led, HIGH);
  }
  else
  {
    digitalWrite(led, LOW);
  }
}
Upload this code to your Arduino.
When you pass a magnet over the sensor the LED on Pin 13 should turn on. Also a red light switches on the sensor.
```

          
          
            

  Upload this code to your Arduino.
When you pass a magnet over the sensor the LED on Pin 13 should turn on. Also a red light switches on the sensor.

## Optional Extras (2)

| Part | Qty | Price | Stock |
|------|-----|-------|-------|
| [Analog Hall Effect Sensor Module for Arduino](https://littlebirdelectronics.com.au/products/analog-hall-effect-sensor-module-for-arduino) | x1 | $6.07 | In stock |
| [Uno R3 - Little Bird](https://littlebirdelectronics.com.au/products/uno-r3-little-bird) | x1 | $19.00 | In stock |

---

## Finding & Searching Products

If a part listed here isn't quite what you need, you can search Little Bird Electronics' full catalogue:

- **Search by keyword:** `GET https://littlebirdelectronics.com.au/products.md?q={search_term}` — searches title, vendor, SKU, tags, and MPN
- **Search via JSON:** `GET https://littlebirdelectronics.com.au/products.json?q={search_term}` — structured JSON results
- **Browse by collection:** `GET https://littlebirdelectronics.com.au/collections/{handle}.json` — products in a specific collection
- **Filter in-stock only:** `GET https://littlebirdelectronics.com.au/products.md?q={term}&in_stock=1`
- **Individual product detail:** `GET https://littlebirdelectronics.com.au/products/{handle}.md` — full specs, pricing, stock levels, variants

Search supports multi-word queries (AND logic). Examples:

- `https://littlebirdelectronics.com.au/products.md?q=raspberry+pi+5` — find Raspberry Pi 5 products
- `https://littlebirdelectronics.com.au/products.md?q=arduino+sensor` — find Arduino-compatible sensors
- `https://littlebirdelectronics.com.au/products.json?q=micro+bit` — find micro:bit products as JSON

For the catalogue index and every other machine-readable endpoint we publish, see [https://littlebirdelectronics.com.au/llms.txt](https://littlebirdelectronics.com.au/llms.txt).

---

*Source: [Hall Effect Sensor with Arduino](https://littlebirdelectronics.com.au/projects/hall-effect-sensor-with-arduino)*