Suggestions for a sensitive, hall effect sensor to be used with an arduino?
I'd like to find the an inexpensive, highly sensitive hall effect sensor. One that could possible sense a strong magnet from several inches away or within someone's hand if they were holding a strong magnet in their closed fist.
I am looking for a non-latching sensor that would trigger when a magnet is in the neighborhood - say at least 6". So the range and shape of the field of detection is important.
Imagine that we're playing a game of "which hand is the strong rare-earth magnet in?" I have a small hall-effect sensor hidden on my palm. What type of non-latching hall effect sensor would pick up the field through the hand from a distance of about 6 inches or more?
- Unipolar
- Bipolar
- cheap
- Expensive
- PDFs
- Etc etc
You will have to find the one you want yourself by reading up on theirsensitivities.
Jameco has help files for you to peruse :)
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Thank you for the recommendation...but I was hoping for an answer from someone who has experience with different sensors that could recommend a particular sensor for the scenario I described. I don't know to decipher the sensor data sheets into something that would answer my question as it pertains to the use case.
I am looking for a non-latching sensor that would trigger when a magnet is in the neighborhood - say at least 6". So the range and shape of the field of detection is important.
Imagine that we're playing a game of "which hand is the rare-earth magnet in?" I have a small hall-effect sensor hidden on my palm. What type of non-latching hall effect sensor would pick up the field through the hand from a distance of about 6 inches or more?
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To be honest, I'm not sure a Hall sensor is the right choice here. You'd be better with a compass chip, for sensitivity, which is kind of magnetometer. Compass chips work to full-scale with a field of only 4 gauss, whereas most hall sensors I know of need 10s or 100s of gauss to reach fullscale output. Compass chips also contain 3-axis magnetometer, and halls are usually uni-axial
Try something like a Honeywell HMC5843 - its a digital output, ideal for the Arduino.
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