rotating lithophane lamp

myminifactory

A long time ago, I designed and printed a round lithophane, but I was unhappy with not being able to see my entire design. To solve this problem, I decided to create a rotating lithophane lamp that would allow me to view all of my pictures on the lithophane. To bring my project to life, I used the following components: - Bottom bearing: 1x ABEC 1 - Stepper motor: 1x - TMC2208: 1x - Arduino Pro Mini: 1x (5V/16MHz) - Brass inserts (M3): 3mm and 5mm in length - 12V power supply: 1x - 12V female plug: 1x - White LED strip: I used regular white LEDs To assemble the lamp, I required the following screws: - 8x M3x16 screw (upper to upper lithophane holder and LED holder to bottom) - 4x M3x10 screw (motor mount to LED holder) - 4x M3x8 screw (motor to motor mount) Additionally, I included a few passive components in the design; you can find more information about them in the schematic. Because the LEDs were generating too much heat, I added a resistor between the 12V power supply and the LEDs. In the photo, I used four 100-ohm resistors in parallel to create an equivalent 1W, 25-ohm resistor. I updated the PCB with a 1W resistor, as the original 1/4W resistor was overheating. Please note that you can use a lower resistance value, but make sure to check if the LED holder can handle the heat generated by the LEDs. To control the stepper motor and communicate with the Arduino Pro Mini, I used the TMC2208 library. Here is the code for the project: You can find the schematic and PCB design in the attached files.