Component Tutorial - Hall Effect Sensors - Proposal

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Propose a component. You can propose multiple components, only one will be done.

Bill of Materials

Component Proposal

For my component proposal I have chosen the hall effect sensor.

Hall-Effect Sensor

The Hall-Effect sensor is a sensor that "toggles when a magnet is held near it [1]". It enables us to detect the presence of a magnet and it can be used for a variety of purposes.

One example I found on the Sparkfun website was a Magnetic Imaging Tile - 8 x 8.

Datasheet

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Motivation

I've picked the hall effect sensor because I am interested in identifying a cheap way to implement an automatic chess board.

Currently the digital version from Squareboard costs roughly $370 - $450, which is an exorbitant sum to pay for a Chessboard.

I am hoping to bring the cost down to $150 which would still be difficult to achieve but may be possible with a minimam electromagnet movement design, simple wood fabrication, and a more effective piece detection mechanism either using the Hall-Effect sensors or the Plastic Paint Magnetic Sensor talked about in "Further Research" below.

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Scope

For the component proposal I am scoping the project down to being able to detect the position of chess pieces. The goal is to produce a component similar to the 8x8 Magnetic Imaging Tile at a cost of $69 that can show the pieces in an 8x8 grid.

Tell us what the electrical interface is

Not sure

Are there libraries needed?

Not sure

Tell us what the physical interface is.

Not sure

What connector is needed to make it reusable?

Not sure

Will you need to make a PCB

Yes.

Further Research

One interesting thing that's come up as a result of studying magnetic sensors and trying to bring their cost down is this paper on Plastic Paint Magnetic Sensors [2][3] for a fraction of the cost.

Reference

[1] Sparkfun Product Page, "Hall-Effect Sensor - US1881 (Latching), [Online]. Available: Hall-Effect Sensor - US1881 (Latching)

[2] Baker, W., Ambal, K., Waters, D. et al. Robust absolute magnetometry with organic thin-film devices. Nat Commun 3, 898 (2012). https://doi.org/10.1038/ncomms1895

[3] University of Utah. "A 'dirt cheap' magnetic field sensor from 'plastic paint'." ScienceDaily. www.sciencedaily.com/releases/2012/06/120612115200.htm (accessed February 23, 2021).