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PCB Christmas Tree

KNEAGHUST·PCB_Christmas_Tree_AGH·KiCAD Files/Manufacturing_main/PCB_Christmas_Tree.kicad_pcb

PCB Christmas Tree layout, top view — open source AVR/Arduino board by KNEAGHUST

About the PCB Christmas Tree

PCB Christmas Tree is an open source AVR/Arduino PCB design by KNEAGHUST, published on GitHub under the MIT license. It is a 2-layer board measuring 100 × 98.6 mm, with 41 components from 11 distinct parts.

Its main chip is the ATtiny402-SS, from the AVR/Arduino family. By type, the board carries 17 resistors, 13 diodes, 5 transistors, 4 connectors, 1 IC and 1 switch.

From the project

PCB Christmas tree designed for the AGH University of Krakow

So... it's a christmas tree... just made from a PCB!

It is green, has stars on it and... it blinks!

The schematics and PCB were designed using KiCAD 7. All the files are available in this repository.

The christmass tree is actually made up of two PCB, that slide into each other and you can solder them toghether.

Microchips Attiny402 microcontroller 0805 LEDs and resistors CR2032 battery 6 mm tact switch for changing blink modes

PCB Christmas Tree, from the project README
From the project README

Main components on the PCB Christmas Tree

ATtiny402-SS

PCB Christmas Tree bill of materials (BOM)

41 components, 11 distinct parts.

QtyPartRefs
1
ATtiny402-SS
U1
4
AO3401A
Q1, Q2, Q3, Q5
1
BC817
Q4
1
CR2032
J1
1
Conn_01x03_Pin
J2
2
Conn_01x04_Pin
J3, J6
1
SW_Omron_B3FS
SW1
1
D_Schottky_Dual_CommonCathode_AAK
D1
12
LED
D2, D3, D4, D5, D10, D11, D12, D13 +4
5
10k
R1, R2, R3, R4, R5
12
100
R6, R7, R8, R9, R14, R15, R16, R17 +4

PCB Christmas Tree design files

The KiCad project lives in the KNEAGHUST/PCB_Christmas_Tree_AGH repository on GitHub; these links point at the commit this page was built from.

PCB Christmas Tree: common questions

What microcontroller does the PCB Christmas Tree use?

The PCB Christmas Tree is built around the ATtiny402-SS, from the AVR/Arduino family.

How big is the PCB Christmas Tree?

The PCB Christmas Tree measures 100 × 98.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the PCB Christmas Tree?

41 components, from 11 distinct parts. The full bill of materials is listed on this page.

Where can I download the PCB Christmas Tree design files?

From the KNEAGHUST/PCB_Christmas_Tree_AGH repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the PCB Christmas Tree design in my own project?

Yes, under the terms of its MIT license, which KNEAGHUST chose for the repository.

Can I test firmware for the PCB Christmas Tree without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.

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