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Mechanical 7-segment display made using electromagnets

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Mechanical 7-segment display made using electromagnets

Arduino TeamJuly 21st, 2020

When you think of a “7-segment” display, your mind naturally goes to something involving LCD or LED technology. As seen here, however, this 0-9 pattern can also be duplicated mechanically using a series of electromagnets.

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Neeraj Rane’s 3D-printed device is controlled by an Arduino Nano, along with a shift register. These activate seven hand-wound coils that push the magnet-embedded segments in and out, via a series of IRF540N MOSFETs.

As of now, the display simply cycles through numbers. If a few more digits were added, and perhaps a user interface and/or an RTC module, it could form the basis of an even more interesting project. Check it out in action below!

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Written by Quad Oner

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