> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt

# Hall effect sensor - US5881LUA

**Type:** Product page · **SKU:** ADA158 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia)
**Page:** https://core-electronics.com.au/hall-effect-sensor-us5881lua.html ([markdown](https://core-electronics.com.au/hall-effect-sensor-us5881lua.html.md))

Hall effect sensors detect whether a magnet is near. Useful for non-contact/waterproof type switches, position sensors, rotary/shaft encoders. I tried dozens of...

## Pricing

- **Price:** $3.95 (inc GST) — $3.59 AUD, exc GST
- **Quantity discounts:** 10+ $3.48 (exc GST) · 50+ $3.41 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Sep 04 and Sep 08.

## How to buy

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## Description

Hall effect sensors detect whether a magnet is near. Useful for non-contact/waterproof type switches, position sensors, rotary/shaft encoders. I tried dozens of different hall effect sensors to see which one would work best for the SpokePOV kit (to determine the wheel location) and this one came out on top!

Runs at 3.5V up to 24V. To use connect power to pin 1 (all the way to the left), ground to pin 2 (middle) and then a 10K pull up resistor from pin 3 to power. Then listen on pin 3, when the south pole of a magnet is near the front of the sensor, pin 3 will go down to 0V. Otherwise it will stay at whatever the pullup resistor is connected to. Nothing occurs if a magnet's north pole is nearby (unipolar).

Works fantastic with the [high strength magnet Read the datasheet](https://core-electronics.com.au/attachments/localcontent/US5881_rev007_451519e801f.pdf)

[Read a nice whitepaper from the manufacturer with many ideas and designs for use](https://core-electronics.com.au/attachments/localcontent/0003715_hallapps_101544962bf.pdf)

### Technical Details

Dimensions:

- Length: 1.51mm/0.06in
- Width: 4.08mm/0.16in
- Height: 3.00mm/0.12in
- Weight: 0.1g/0.004oz

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/1/5/158-00.jpg)