4 layers62.1 × 83.8 mm
Ss main board
loopj/short-stack
World's Smallest Nintendo Wii, using a trimmed motherboard and custom stacked PCBs
69 parts804
2 layers80 × 50 mm
SiliCa
19AJ137/SiliCa47FeliCa®互換カード「SiliCa」
- Size
- 80 × 50 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 14
- Nets
- 17
- Pads
- 53
- Tracks, vias
- 145, 20
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 16 Oct 2025
- Updated
- 5 Jul 2026
Overview
SiliCa is an open-source printed circuit board by 19AJ137, from the 19AJ137/SiliCa repository on GitHub, published under the Unlicense licence. It is a 2-layer board of 80 × 50 mm with 14 parts on 17 nets, routed with 145 tracks and 20 vias.
It is built around the ATTINY1616-MN. Its parts include 4 capacitors, 3 resistors, 2 diodes, 1 IC and 1 connector. It belongs with the radio and wireless boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
1README
README.mdSiliCa
SiliCa は、JIS X 6319-4（FeliCa）互換の非接触型 IC カードです。
マイコンとして ATtiny1616 を採用しており、外部電源を必要とせず、カードリーダからの給電によって動作します。
概要
SiliCa は、最小限のハードウェア構成で、 FeliCa プロトコルをファームウェアによって再現し、FeliCa Standard や FeliCa Lite-S のエミュレーションを実現することを目的としています。
また、SiliCa では、実際の FeliCa カードで書き換えが不可能な IDm やシステムコードなどのパラメータを自由に書き換えることができます。
詳細な仕様や使用方法については、寄稿した同人誌 rand_r(&v3) をご参照ください。
回路図
注意事項
本プロジェクトは、学術的および実験的な目的で提供されており、商業利用や実際の運用を目的としたものではありません。
FeliCaは、ソニー株式会社が開発した非接触ICカードの技術方式です。
FeliCaは、ソニーグループ株式会社の登録商標です。
本文では™、®は明記していません。Parts
14| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | C | Capacitor_SMD:C_0402_1005Metric | C1, C2, C3, C4 |
| 3 | R | Resistor_SMD:R_0402_1005Metric | R1, R2, R3 |
| 2 | D_Schottky_Dual_Series_AKC_Parallel | Package_TO_SOT_SMD:SOT-523 | D1, D2 |
| 1 | ATtiny1616-M | Package_DFN_QFN:VQFN-20-1EP_3x3mm_P0.4mm_EP1.7x1.7mm | U1 |
| 1 | Antenna_Loop | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | AE1 |
| 1 | Conn_01x04_Pin | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J1 |
The 12 most common of 14 parts.
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Questions
How big is the SiliCa PCB?
It measures 80 × 50 mm and has 2 copper layers, 1.6 mm thick.
What parts does the SiliCa use?
14 parts, built around the ATTINY1616-MN. 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 SiliCa KiCad files?
From the 19AJ137/SiliCa repository on GitHub, at the commit this page was made from: the board is cad/1_1/1_1.kicad_pcb and its schematic cad/1_1/1_1.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the SiliCa design in my own project?
Its repository publishes it under the Unlicense licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).