by Xrew
There are some modifications:
A threaded stand has been developed.
The original ‘LED Christmas Tree’ has been modified by adding a thread.
The RGB LED and the ATtiny13 microcontroller were used to create beautiful multicolor glow. The colors of the ‘RGB LED Christmas Tree’ change smoothly. The first and all subsequent colors are randomly selected. The color change rate is also randomly selected.
Print the tree with no infill. Use 2–4 perimeters.
Use supports to print stand (Stand_part1.stl). I printed stand upside down and then filed the top plane. The stand does not contain a hole for the USB cable so that you can arrange the tree as you like. Just drill a hole at the end so that the wire is on the back of the stand.
Upload hex file to ATtiny13 (How_to_upload_hex.pdf).
Solder and place all electronic components inside the stand. An electronic circuit can be soldered without a board at all using through-hole components. On the other hand, you can etch the board (PCB.emf) and use SMD components (1206 resistors and SO-8 ATTiny13).
Glue the bottom (Stand_part2.stl) to the stand (Stand_part1.stl).
Common cathode RGB led (5 mm) – 1 pc.
ATtiny13 – 1 pc.
Resistor 680 Ohm – 2 pcs.
Resistor 220 Ohm – 1 pc.
USB cable – 1 pc.
AVR Programmer or Arduino board – 1 pc.
