# Gravity: 360 Degree Hall Angle Sensor (SEN0221)

**URL:** <https://forum.core-electronics.com.au/t/gravity-360-degree-hall-angle-sensor-sen0221/6926>\
**Category:** DFRobot\
**Created:** [4 December 2019 05:58 UTC](https://forum.core-electronics.com.au/t/gravity-360-degree-hall-angle-sensor-sen0221/6926 "2019-12-04T05:58:31Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Core](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/core/32/57_2.png) [@Core](https://forum.core-electronics.com.au/u/Core)\
**Post date:** [4 December 2019 05:58 UTC](https://forum.core-electronics.com.au/t/gravity-360-degree-hall-angle-sensor-sen0221/6926/1 "2019-12-04T05:58:31Z")

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This is a placeholder topic for [**“Gravity: 360 Degree Hall Angle Sensor”**](http://core-electronics.com.au/catalog/product/view/sku/SEN0221) comments.

 ![](https://core-electronics.com.au/media/catalog/product//_/w/_w4a9613-900x600.jpg)  
  
The Hall Angle Sensor is a miniature 360 degree sensor which works based on the principle of the Hall effect. It is compatible with the DFRobot Gravity sensor interface, … read more  
  
[**Read more**](http://core-electronics.com.au/catalog/product/view/sku/SEN0221)

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**Author:** ![brendan104917](https://avatars.discourse-cdn.com/v4/letter/b/dfb087/32.png) [@brendan104917](https://forum.core-electronics.com.au/u/brendan104917)\
**Post date:** [4 December 2019 05:58 UTC](https://forum.core-electronics.com.au/t/gravity-360-degree-hall-angle-sensor-sen0221/6926/2 "2019-12-04T05:58:33Z")

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looking for something that can be used as an exsternal position sensor yo replace the internal hall effect sensors on a 48v 5ooow hub motor

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**Author:** ![Bryce](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/bryce/32/3631_2.png) [@Bryce](https://forum.core-electronics.com.au/u/Bryce)\
**Post date:** [5 December 2019 05:20 UTC](https://forum.core-electronics.com.au/t/gravity-360-degree-hall-angle-sensor-sen0221/6926/3 "2019-12-05T05:20:06Z")

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Hey Brendan,

Have you considered using [a reed switch](https://core-electronics.com.au/reed-switch.html) to detect incremental rotations of the hub motor based on magnets attached to predetermined angles on the wheel? (Have 4 each magnet positioned 90 degrees apart, or 8 at 45 degrees apart etc) By using a microcontroller such as an Arduino it’s possible to determine wheel position based on the number of current pulses through the reed switch. This would have a similar effect to a hall effect sensor, but is more easily customised and can have other features added later.

From Bryce