]> 2026-04-29T17:45:15+02:00 Fibonacci Clock 0 fr Electronics Decoration Published 80 EUR (€) This strange clock use the Fibonacci sequence to display time. Each square represents a value of the sequence. We must add the square's values to get the hour and the minutes. Hours are red squares, minutes are green squares and blue squares count for hour and minutes. Medium 2 day(s) This tutorial is inspired from the creation of Philippe Chrétien. Here is his website : http://geekoclock.com/ This version is base on an Arduino UNO board. This project use a addressable RGB LEDs strip. It enable to control color and intensity of each LED individually, using only one control pin on the Arduino. true en Attribution (CC BY) horloge fibo.JPG * plywood 5mm thick * plexi * Arduino UNO board * Real Time clock module RTC DS1307 * addressable RGB LED strip * 4 push buttons * power supply for arduino * supply connector * electric wires Warning : check that your RGB LED strip is addressable. The strip I used has the following reference : WS2812B fr Cut 4 plywood board for outside walls, 2 others for bottom and double-bottom, and 4 littles more for inside walls to split squares. Dimensions are the following : For outside walls : * 2 boards 85mm * 221mm * 2 boards 85mm * 138mm for bottom and double-bottom : * 2 boards 128mm * 211mm for inside walls: * 1 board 50mm * 128mm * 1 board 50mm * 78mm * 1 board 50mm * 50mm * 1 board 50mm * 26mm Cut 4mm slots to fit together the four sides. Use a wood file for the finishing. Cut the LED strip into 3 strips of 1 LED and 3 strips of 2 LEDS. Weld with small wires with good length, to place them into squares, as shown on the picture. Then glue the strip on the wood board of the double-bottom. Put a hole to pass wires to the other side of the double-bottom. Glue the 4 sides with the double-bottom, positioning it at 5cm from the front. Wait until the glue dries. (20 min minimum) Once dry, glue the separations. Prepare now the other side of the double-bottom : To fix the electronic board, and avoid screw exceed from the wood board, we add wood thickness where we want to place the electronic board. Put small pre-holes for the srew, then fix the arduino board on the double-bottom. Follow the given scheme to weld wires. I tape wires in order that they stay in place. Only wire on the Arduino board aren't weld. Download Arduino IDE : https://www.arduino.cc/en/Main/Software Install the NeoPixel Library, available here : https://github.com/adafruit/Adafruit_NeoPixel After download it, rename the directory to 'Adafruit_NeoPixel' and place it into the directory 'librairie' into the directory of your IDE installation. The Arduino program of the clock is available on Github : https://github.com/pierreboutet/fibonacciClock Download it, and open it with the Arduino IDE Plug the arduino board with the usb wire, et upload the program from the IDE. To get good opacity, i place a tracing-paper between two transparent plexi. Thus, it is enough opaque to transmit light homogeneously. And LEDs aren't directly visibles. Idealy one unique white plexy board non opaque would fit, but I didn't have any. You can plug your clock, and learn how to read time. :) How to read time ? Squares have values of the Fibonacci sequence : 1 1 2 3 5 Red squares count for hours, Green squares count for minutes, and blue squares count for both hours and minutes. We get hours and minute by addition of the matching squares values. For minutes the values must be multiplied by 5, because the clock count by 5 minutes steps. Exemple, on the below picture : We addition red and blue squares for hours, it gives : 1 + 3 + 5 = 9h and green and blue squares for minutes, multiplied by 5, it gives : (1 + 1 + 3 ) * 5 = 25min It is so 9:25 Cut the plywood Cut sides to fit together Cut and weld the LED strip Assemble and glue the box Glue the separation walls Glue a support board for the electronic board Fix the Arduino board Weld components Load the program Add the plexi windows It's done Arduino * scie * fer à souder * perceuse * cutter * lime à bois * colle à bois Creation Fibonacci Clock 2020-11-02T14:54:09Z 2459156.1209375 Fibonacci Clock 3 1 0 3D print the case!! 844 fr 3D print the case!! CommentStreams:40792521efdfa9b1166aae2ee4333a47 844 fr 40792521efdfa9b1166aae2ee4333a47 It does not show the time 844 fr It does not show the time Comment on 102 fr Comment on