Wireless Powered Light Cube

thingiverse

I wanted to help my 2-year-old son learn his colors, so I decided to teach him using a fun project instead of just reading from a book with pictures of colors or relying on wireless charging modules that I had ordered online. This design utilizes the wireless charging modules to power an ATTINY85 microprocessor chip that drives seven WS2812B LEDs. The cube goes through a cycle of seven different colors every time it's placed on and off the charging block. The cube is printed using lithophane-specific filament, while the rest is made from black PLA. It requires only 5V/2A power supply and can be used as a night light easily. I built this fun little project despite not having an Eagle PCB schematic for it, but I did learn that adding a zener diode and capacitor can be a great idea to prevent voltage spikes. Unfortunately, I lost a few modules due to what I suspect were voltage spikes. Components: 1. ATTINY85 DIP chip 2. Wireless Qi Receiver (aliexpress.com/item/32852366953.html) 3. Wireless Qi charging Transmitter (aliexpress.com/item/32956569781.html) 4. 5.1v Zener Diode 5. 100uF Capacitor 6. WS2812b LED (aliexpress.com/item/32834127593.html) 7. Prototype board 8. Soldering equipment and hot glue gun