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+---
+description: "Big 3D printed RGB LED seven segment display clock"
+created: 2023-11-14
+---
+
+![7 Segment display](Main.jpg)
+
+## Links
+- [Firmware source code - GIT](https://git.node5.net/firmware/seven-segment-display/) My custom C++ firmware check this out
+- [youtube.com - Segmented Displays by Posy](https://www.youtube.com/watch?v=RTB5XhjbgZA)
+- [Wikipedia Seven-segment display](https://en.wikipedia.org/wiki/Seven-segment_display) Contains standard segment naming
+- [Segment design SVGs](http://www.michieldb.nl/other/segments/)
+
+## Parts
+- [WS2811 Aliexpress White PCB Ordinary, 5m 60 IP30](https://www.aliexpress.com/item/2000165819.html)
+
+# Design / planing / idea phase
+I got further interested in 7-segmented displays after a fellow hacker made a project with it, 
+and i wanted to explore my fondness of this delightful concept.
+I decided to make a clock with it, but this is a concept that has been done before. 
+So i wanted some twist on the concept, and remembered this wonderful video: 
+[youtube.com - Segmented Displays by Posy](https://www.youtube.com/watch?v=RTB5XhjbgZA).
+Hence i chose a design (Classic black) optimized for displaying numbers, but also one that still retained the boxy look.
+Credit to the designer [Michiel de Boer(Posy)](http://www.michieldb.nl/).
+
+TODO Wire diagram
+
+## Diffusion
+
+![Diffusion test](Diffusion test.jpg)
+
+I tested both clear and white PLA with different layer heights by printing squares. Then i moved onto the distance.
+I determeined 2 layers of white PLA at a distance of 1.5 cm. was a good compromise.
+
+## CAD
+
+### Files
+- Project box 
+    - [Box - FreeCAD](CAD/Box/7 segment display box.FCStd)
+    - [Box - STL](CAD/Box/7 segment display box.stl)
+    - [Lid - STL](CAD/Box/7 segment display box lid.stl)
+- Digit
+    - [Digit - FreeCAD](CAD/Digit/7 segment display.FCStd)
+    - [Digit top diffuser - STL](CAD/Digit/7 segment display top diffuser.stl)
+    - [Digit bottom - STL](CAD/Digit/7 segment display bottom.stl)
+
+### Digits
+I used FreeCAD to design a bottom and top piece based on the SVG files.
+
+### Box
+I used [this GRABCAD model](https://grabcad.com/library/arduino-dc-barrel-jack-2-1mm-for-kicad-1)
+License: [GRABCAD Non-Comercial Licenses](https://help.grabcad.com/article/246-how-can-models-be-used-and-shared)
+TODO Add picture of DC barreljack
+
+## Wiring
+
+![Segments wired](Segments wired.jpg)
+
+## Firmware
+
+### Fading effect
+<video controls style="width: 100%">
+  <source src="Minute fade.mp4" type="video/mp4">
+  Your browser does not support the video tag.
+</video>
+
+I chose to add a slow fade effect as to not disturb ones peripheral vision.
+
+### Color change timelapse
+<video controls style="width: 100%">
+  <source src="Timelapse.mp4" type="video/mp4">
+  Your browser does not support the video tag.
+</video>
+
+The color changes hue overtime, but it does so slowly, as to not be noticeable.
+
+I've later changed this color hue to be derived from the time of day, 
+so it will always have the same color at the same time of day.
+This change was easy to implement, due to my use of [HSV](https://en.wikipedia.org/wiki/HSL_and_HSV) See 
+[this commit](https://git.node5.net/firmware/seven-segment-display/commit/?id=99da4c6eb43516c266fb33dc84d43d5d6f655464)
+
+Now your brain can become wired to think, wow the clock is red, it's pretty late, i should go home.
+
+### Hour change animation
+
+I've also added a rainbow vomit animation once an hour, that intentionally grabs your attention, 
+to make you more aware of the passing time. As it's easy to lose track of time.
+