/challenges-projects/design-challenges/twist-turn-and-move-design-challenge-with-te-robotics/b/blog/posts/pool-butler-blog-5-twist-turn---messing-with-magnets-flux-lines-hall-effect-sensor-to-find-homeIn Pool Butler Blog#4 , a statement was made that limit switches or a home switch would be needed to locate the Pool Butler&#39;s (airboat) rudder&#39;s position after power up. The control is envisioned to use CW and CCW touch switches to move the rudder toen-USTelligent Community 12https://community.element14.com/challenges-projects/design-challenges/twist-turn-and-move-design-challenge-with-te-robotics/b/blog/posts/pool-butler-blog-5-twist-turn---messing-with-magnets-flux-lines-hall-effect-sensor-to-find-homeMon, 15 Aug 2022 16:46:06 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:5e158365-e878-4f31-a418-f7ec49d27ae4dougw1<p>Good work finding a workable geometry.</p> <p>Is the Hall sensor facing the new flat side? Hall sensors work best when flux lines pass perpendicularly through the plane of the sensor wafer. Usually the wafer plane can be deduced by looking at how the pins would connect to the wafer. You can often control or concentrate the flux lines with a steel &quot;pole piece&quot; near the sensor.</p><img src="https://community.element14.com/aggbug?PostID=24225&AppID=374&AppType=Weblog&ContentType=0" width="1" height="1">