Saw that can cut 30-degree angles (miter-saw) Resistor (between 300 and 500 Ohm) Tools: ws2812b LED strip (5m 30Leds/meter IP30) 5V 10A power supply (lower Amperage might also work) Old USB cable (one that can power the Arduino nano) 128 ping pong balls (white ones preferably milky white) Wood for a frame (has to be 5 cm wide and a total length of at least 200 centimeters ) I build a small piece of this display (picture) both times I build one of these, and I am glad I did. This could also prevent mistakes that otherwise might occur later on ( like having to much space between balls). This allows you to see if the ping pong balls diffuse the light nicely. Is way faster to make, since soldering 128*6 contacts, and stripping the same amount of wires takes some timeįor anyone building this: This project requires some repetitive work, I advise to first make a small test version of this project to see how the end result will look like. looks cleaner, since wires and electronics cannot be seen from the front. allows for easier modifications and possible repair. has a back panel, so you can not see through gaps. has pixels orientated in a way so it is easier to program. uses LED strips instead of separately soldered together Neo-Pixels. In the images, you can see the previous version and the new one (the pictures with 2 panels, the top one is the old version). Whilst doing this I found out that this way the total amount of balls and LEDs became to be 128. I also wanted to have at least one row of balls between the digits to improve readability. This size came to be because I wanted four digits next to each other, with a colon in the middle. The length of the middle row is 20 balls (20*4 = 80cm). After some sketching, I found that this allowed for the clearest digit representations. The design I settled on uses 12 ping pong balls for each digit. Since the ping pong balls are not oriented in a matrix, I had to come up with a nice way to display digits. With this instructable, I hope to get others excited and inspired to build their own projects. Since some people were interested in a tutorial, I decided to improve the build and make a new improved version of the ping pong ball clock. After making some sketches and ordering parts I finally finished the project. This inspired me to make something with ping pong balls as well. Last year I saw quite some great projects from people that used ping pong balls as diffusers for LEDs. It can function as a Clock, can be LED decoration, or it can just be a nice piece of decoration when turned off. This awesome LED clock is a quite simple project that nearly everyone can make.
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