If that doesn't ring a bell, type "holographic fan" on YouTube, and you'll see.
I've been wanting to design one myself for a while. So I started by creating the rotating arm.
For this, I need:
- A piece of cardboard
- A bit of red paper for aesthetics
- Two small addressable LED strips (because the ones I have are really not very dense).
- An Arduino pro mini found at the bottom of a drawer
- A lithium battery recovered from an old advertising USB external battery
- A TP4056 to recharge the battery
- A switch
- A counterweight (to prevent the battery from putting all the weight only on the battery side)
- Hot glue
- Wires
I then attach the arm to the axis of a 12 volt motor itself connected to a transformer via of a rectifier.
Finally, I upload the animation code of the addressable led strip on the arduino (I struggle for 20 minutes before succeeding), and I start the device, holding the motor by hand.
The motor being overheated, I change the transformer for a new one of only 10V at 500ma, instead of the old one delivering 12V at 1.50A.
And sincerely, the work is worth it, I find it really magnificent.
I then fix everything on a cardboard board (4 layers thick), in order to be able to place it on a table with a weight on it (in my case a Larousse 2022 dictionary).
Here is the result, give me your opinion in the comments, but I find it very beautiful. (it looks better in real life, and the video quality is questionable)
I plan to improve my project to be able to display various things, so subscribe to the Linaki.org newsletter to be kept informed!
See you soon!