These were small New Year souvenirs I've made for my friends and family.
Snowflake shaped piece of laser cut acrylic with a small PCB in the center. PCB has 6 right angle mounted LEDs illuminating the inside of the acrylic sheet. LEDs are driven by the microcontroller, which uses PWM to make LEDs glow in a pseudo random way. One button, connected to the reset pin of the microcontroller, is used to turn on and turn off the device.
lasercut directory contains a Sketchup file with two snowflake shapes.
pcb directory contains the schematic and PCB layout made in Eagle CAD.
firmware directory contains the program for the STM8L051F3 MCU. To build it:
- install SDCC and add it to the
PATH - run
git submodule update --initto get libstm8 submodule - go to
firmwaredirectory and runmake
stm8flash wan used to flash the firmware to the MCU. Compile it, and add it to the PATH. Then run make flash in firmware directory.
- LEDs: https://item.taobao.com/item.htm?id=525144507380
- 0603 1k resistors
- CR1220 battery: https://item.taobao.com/item.htm?id=521527440135
- STM8L051F3P6 MCU: https://detail.tmall.com/item.htm?id=40540345444
All files in this repository (except libstm8 submodule) are distributed under CC0 license.