2 layers22.2 × 46.4 mm
C64-Switchless Quad Kernal Switcher
bwack/C64-Switchless-Multi-Kernal-27C256-adapter
Kernal switcher for the C64/C64C/C128
14 parts112
2 layers114.3 × 163.2 mm
PCBTree
nicelion/PCBTree1A Christmas tree shaped circuit board that every nerd will love!
- Size
- 114.3 × 163.2 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 35
- Nets
- 26
- Pads
- 80
- Tracks, vias
- 180, 23
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 30 Nov 2017
- Updated
- 12 Aug 2022
Overview
PCBTree is an open-source printed circuit board by nicelion, from the nicelion/PCBTree repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 114.3 × 163.2 mm with 35 parts on 26 nets, routed with 180 tracks and 23 vias.
It is built around the ATTINY85-20PU. Its parts include 2 resistors and 1 connector. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
1README
README.mdPCBTree
A Christmas tree shaped circuit board that every nerd will love!
About
PCBTree fills it's name quite well as it is, exactly what it says: A PCB tree. The Christmas tree shaped printed circuit board is populated with 6 green LEDs and 6 red LEDs and two yellow LEDs, all controlled by an ATTiny85 to allow the red and green LEDs to flash to you liking.
Instruction
How to operate
If you were given a PCBTree, below is some basic information on how it can be used.
Plugging In and Turning On
To first turn on PCBTree, one must plug in the provided 5V AC-DC adapter into the barrel jack connector located on the beck of the device, and into the wall.
Once this is done, the switch on the back of the device must also be switched to the "on" state, and PCBTree will then turn on.
Adjusting Blink Speed
A dial, professionally, a potentiometer, can be found on the base, towards the front. This dial can be used to adjust the speed the LEDs will flash. The equation is below:
The potentiometer give the microcontroller a value, between 50 and 500, and the delay between the flashing will be the potentiometer value, multiplied by 1.25 in miliseconds.
For example, if the potentiometer result is 300, the delay between the flashes will be 375 miliseconds.
However, if the potentiometer's value is 50, or all the way off, the red and green LEDs will not flash and if the potetiometer returns 500, then the red and green LEDs will shine constantly. The yellow star led will shine always unless the unit is turned off.
Parts
35| Qty | Value | Footprint | References |
|---|---|---|---|
| 14 | LED | LEDs:LED_1206_HandSoldering | GREEN_LED1, GREEN_LED2, GREEN_LED3, GREEN_LED4, GREEN_LED5, GREEN_LED6, RED_LED1, RED_LED2, RED_LED3, RED_LED4, RED_LED5, RED_LED6, STAR1, STAR2 |
| 8 | 150Ω | Resistors_SMD:R_1206_HandSoldering | R_RED1, R_RED2, R_RED3, R_RED4, R_RED5, R_RED6, R_STAR1, R_STAR2 |
| 6 | 95Ω | Resistors_SMD:R_1206_HandSoldering | R_GREEN1, R_GREEN2, R_GREEN3, R_GREEN4, R_GREEN5, R_GREEN6 |
| 2 | 1KΩ | Resistors_SMD:R_1206_HandSoldering | R1, R2 |
| 2 | TRANSISTOR_PNPMMBT4403 | TO_SOT_Packages_SMD:SOT-23_Handsoldering | T_GREEN1, T_RED1 |
| 1 | ATTINY85-20PU | Housings_DIP:DIP-8_W7.62mm_SMD | LED_CONTROLLER |
| 1 | BARREL_JACK | Connectors:BARREL_JACK | J2 |
| 1 | POT | Connectors:PINHEAD1-3 | SPEED_POT1 |
Questions
How big is the PCBTree PCB?
It measures 114.3 × 163.2 mm and has 2 copper layers, 1.6 mm thick.
What parts does the PCBTree use?
35 parts, built around the ATTINY85-20PU. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the PCBTree KiCad files?
From the nicelion/PCBTree repository on GitHub, at the commit this page was made from: the board is KiCAD/PCBTree.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the PCBTree design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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