12 led filaments and half mirror to build a infinite filament cube
Step 1: What Is Led Filament?
If you want to buy them on ebay, you can try to search the key words led filament chip.
Step 2: Solder the Filament Correctly
Solder the led filaments like the photos. And solder the motor wires to the terminal of the filaments.
Tip: the filaments are really sensitive to the solder iron temperature, you may break it if you solder it too long time or the iron setting is too high temperature.
Step 3: Hang the Filaments Cube Inside the Half Mirror Cube and Glue It.
Step 4: Connect the Filament Cube's Terminal to the DC-DC Boost Circuit.
I use xl6005 boost circuit to convert 5V to 60V for the filaments. Then I can use the USB power bank to power my filament cube. XL6005 can support 5V input instead of 12V input only.