2 layers47.6 × 27.3 mm
2 layers50.8 × 50.8 mm
IcosaStellaMedallion
UserHackable/IcosaStellaMedallionIcosaStellaMedallion
- Size
- 50.8 × 50.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 27
- Nets
- 8
- Pads
- 65
- Tracks, vias
- 158, 3
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 8 Apr 2016
- Updated
- 20 Jul 2026
Overview
IcosaStellaMedallion is an open-source printed circuit board by UserHackable, from the UserHackable/IcosaStellaMedallion repository on GitHub. It is a 2-layer board of 50.8 × 50.8 mm with 27 parts on 8 nets, routed with 158 tracks and 3 vias.
Its parts include 20 diodes, 1 IC, 1 connector and 1 switch.
README
README.mdIcosa Stella Medallion
A version of this board was the first PCB I had manufactured, and the surface mount soldered the ATtiny85 and button to.
This design is still my favorite for wearables, and has inspired may of my other 20 LED ATtiny85 Charlieplex boards.
IcosaStellaMedallion
Board dimensions
- (200000, 200000) original units
- (2.0000, 2.0000) inches
- (50.8000, 50.8000) mm
| Front | Back |
|---|---|
 |  |
Parts
27| Qty | Value | Footprint | References |
|---|---|---|---|
| 20 | LED5MM | LED1, LED2, LED3, LED4, LED5, LED10, LED11, LED12, LED13, LED14, LED15, LED16, LED17, LED18, LED19, LED20 +4 | |
| 1 | dummyfp1 | UNK_HOLE_1 | |
| 1 | TACTILE-SWITCH-SMD | S1 | |
| 1 | CR2032-THRU | U$1 | |
| 1 | dummyfp0 | UNK_HOLE_0 | |
| 1 | AVR_SPI_PRG_6LABELED | 2X3-NS | J1 |
| 1 | TAC_SPST_NOSMD | KXT | U$2 |
| 1 | Tiny85-20-SMT | SO08-EIAJ | U1 |
Questions
How big is the IcosaStellaMedallion PCB?
It measures 50.8 × 50.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the IcosaStellaMedallion use?
27 parts. 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 IcosaStellaMedallion KiCad files?
From the UserHackable/IcosaStellaMedallion repository on GitHub, at the commit this page was made from: the board is KiCad/IcosaStellaMedallion/IcosaStellaMedallion.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the IcosaStellaMedallion design in my own project?
Its repository states no licence, so its author keeps all rights: ask UserHackable before reusing the design.
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