Here is my design for a lithophane picture frame with a dimmer control knob. This was made using the parts from a cheap 5m LED strip from amazon. The model was built around a lithophane picture with the following dimensions: Image:

• Width: 150 mm
• Height: 98.413 mm
• Border:5 mm width and 1 mm thick (3.15 mm thick at the bottom)

You don´t need any external hardware (except the LED strip) for building this, just make sure to get the tolerances right. All connections were made with a 0.2 mm tolerance.