Small magnetic sensor

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marcwolf
Posts: 6
Joined: Sun Jul 17, 2011 10:59 pm

Small magnetic sensor

Post by marcwolf » Sun Jul 30, 2017 6:16 pm

Hi.
I am looking for a small magnetic sensor that can measure the proximity of a magnet. The distance to be measured is up to 4cm away using a small rare earth magnet. ( https://www.sparkfun.com/products/8644 )

The idea is that the magnet will be attached to an eyebrow and a shield on the forehead with the magnetic sensor can read the magnet and give a proportional reading on the distance down to 1mm or less resolution.

I have tried various hall effect devices but none of them have the distance sensitivity that I need. As mentioned the sensor needs to be small and lightweight.

Output can be analogue, SPI, or I2C

Many thanks
Marc

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