Node
About the Node PCB
Node is an open source RISC-V PCB design by cUDGk, published on GitHub under the Custom license license. It is a 2-layer board measuring 32 × 29 mm, with 20 components from 16 distinct parts.
Its main chip is the C2913197, from the RISC-V family. Other key parts include the C6186, C22459454 and C7519. By type, the board carries 7 capacitors, 5 ICs, 5 resistors, 2 connectors and 1 diode.
It belongs with the sensors designs in this gallery.
From the project
VRChat向けフルボディトラッキング基板 — ハブ+デイジーチェーン端末・数と位置を自由に変更可能・KiCad/OpenSCAD一式
腰のハブに端末を数珠つなぎするだけ。トラッカーの数も付ける場所も自由に決められる。
市販のフルトラは「6点」「8点」とセット構成が決め打ちで、膝だけ増やしたいとか肘に付けたいといった要求に応えてくれません。このプロジェクトは腰に付けるハブから端末をデイジーチェーンでぶら下げる方式にして、トラッカーの数と装着位置を後から自由に変えられるようにしたものです。
端末どうしは 4 線のケーブルで数珠つなぎになり、位置 ID はハブからのホップ数で自動的に決まります。設定ファイルを書き換える必要はありません。ケーブルを挿し替えれば、その日の用途に合わせて構成を変えられます。
回路図と基板はすべて Python のジェネレータから生成しています。KiCad で手で配線したものではないので、座標や配線を変えたければスクリプトを書き換えて再生成してください。
Main components on the Node
Node bill of materials (BOM)
20 components, 16 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | C2913197 CH32V003F4P6 | TSSOP-20_4.4x6.5mm_P0.65mm | U1 |
| 1 | C6186 AP2112K-3.3 | SOT-23-5 | U2 |
| 1 | C22459454 ICM-45686 | LGA-14_3x2.5mm_P0.5mm_LayoutBorder3x4y | U3 |
| 2 | C7519 USBLC6-2SC6 | SOT-23-6 | U4, U5 |
| 1 | C165948 JST PH 4P UPSTREAM | JST_PH_S4B-PH-SM4-TB_1x04-1MP_P2.00mm_Horizontal | J1 |
| 1 | C265102 JST PH 4P DOWNSTREAM | JST_PH_S4B-PH-SM4-TB_1x04-1MP_P2.00mm_Horizontal | J2 |
| 1 | C2286 STATUS | LED_0603_1608Metric | D1 |
| 1 | C28323 1uF | C_0603_1608Metric | C1 |
| 1 | C2927050 1uF | C_0603_1608Metric | C2 |
| 1 | C15850 100nF | C_0402_1005Metric | C3 |
| 3 | C1525 100nF | C_0402_1005Metric | C4, C5, C7 |
| 1 | C52923 100nF | C_0402_1005Metric | C6 |
| 2 | C25905 4.7k | R_0402_1005Metric | R1, R2 |
| 1 | C60489 1k | R_0402_1005Metric | R3 |
| 1 | C25117 22R | R_0402_1005Metric | R4 |
| 1 | C25092 22R | R_0402_1005Metric | R5 |
Node design files
The KiCad project lives in the cUDGk/vrc-fbt-hardware repository on GitHub; these links point at the commit this page was built from.
- Layoutnode/node.kicad_pcb
- Schematicnode/node.kicad_sch
- BOMorder/hub/hub_bom.csv
Node: common questions
What microcontroller does the Node use?
The Node is built around the C2913197, from the RISC-V family.
How big is the Node PCB?
The Node measures 32 × 29 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Node?
20 components, from 16 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Node design files?
From the cUDGk/vrc-fbt-hardware repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Node design in my own project?
It is published under Custom license, which limits how it may be reused; read the license before building on it.
Can I test firmware for the Node without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RISC-V firmware against it before you order a PCB.
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