This is a lithophane frame backlighted with 2x8 Neopixel sticks controlled by a Adafruit Trinket 3.3v.
It is designed for a 100x75x3 mm Lithophane with 5mm border.
It is powered from a 1100mAh battery and rechargeable via USB. It has an on/off switch and a potentiometer to go through different colors.
You can grab de Trinket code and schematic from GitHub.
More info at Agente404's blog (spanish)
- Print the frame in every color you want.
- The reflector may be printed in glossy white.
- The difusser for battery leds may be printed in clear PLA