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Thermochromic Temperature & Humidity Display

A 7-segment display using thermochromic liquid crystal sheets that are heated and cooled by peltier elements

moritz-v-siversMoritz v. Sivers
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In this project I built a two digit 7-segment display using copper plates that are covered with thermochromic sheets based on liquid crystals. Behind every copper plate sits a TEC element that controls the temperature and thereby changes the color of the liquid crystal sheet. The numbers show the temperature and humidity from a DHT22 sensor.

backplate.dxf

dxf file for the backplate

AutoCAD DXF - 45.22 kB - 08/17/2019 at 20:41

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prozent.dxf

dxf file for the dash shaped segment

AutoCAD DXF - 3.73 kB - 08/17/2019 at 20:41

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circle.dxf

dxf file for the dot shaped segment

AutoCAD DXF - 5.32 kB - 08/17/2019 at 20:41

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segments.dxf

dxf file for the segments showing the digits

AutoCAD DXF - 8.15 kB - 08/17/2019 at 20:41

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thermochromic temperature display wiring.pdf

Table documenting all the connections

Adobe Portable Document Format - 49.59 kB - 08/17/2019 at 20:39

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