HardLabs

Hub

cUDGk·vrc-fbt-hardware·hub/hub.kicad_pcb

Hub PCB layout, top view — open source ESP32 board by cUDGk

About the Hub PCB

Hub is an open source ESP32 PCB design by cUDGk, published on GitHub under the Custom license license. It is a 2-layer board measuring 60 × 48 mm, with 55 components from 31 distinct parts.

Its main chip is the C2913197, from the ESP32 family. Other key parts include the C6186, C22459454, C7519 and C55136. By type, the board carries 17 resistors, 14 capacitors, 9 ICs, 5 connectors, 4 fuses and 2 switches.

It belongs with the sensors and iot & wireless 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 Hub

C2913197C6186C22459454C7519C55136

Hub bill of materials (BOM)

55 components, 31 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
C2913197
ESP32-S3-WROOM-1
U1
1
C6186
AMS1117-3.3
U2
1
C22459454
ICM-45686
U3
5
C7519
USBLC6-2SC6
U4, U5, U6, U7, U8
1
C55136
SY6280AAC
U9
1
C2146
S8050
Q1
1
C165948
USB-C USB2.0 16P
J1
1
C265102
PORT UP-L
J2
1
C265102
PORT UP-R
J3
1
C265102
PORT DN-L
J4
1
C265102
PORT DN-R
J5
1
C94599
MLT-8530
BZ1
4
C492010
Ihold 200mA
F1, F2, F3, F4
1
C221896
EN / RESET
SW1
1
C221896
BOOT
SW2
1
C2286
POWER
D1
1
C2128
1N4148WS
D2
1
C28323
1uF
C1
1
C2927050
22uF 16V Tantalum
C2
3
C15850
10uF
C3, C12, C13
Show 11 more
QtyPartRefs
8
C1525
100nF
C4, C5, C7, C8, C9, C10, C11, C14
1
C52923
1uF
C6
2
C25905
5.1k
R1, R2
2
C60489
10k
R3, R11
1
C25117
470R
R4
6
C25092
22R
R5, R6, R12, R13, R14, R15
1
C21190
1k
R7
2
C25940
4.7k
R8, R9
1
C25792
47k
R10
1
C25741
100k
R16
1
C25917
6.8k
R17

Hub 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.

Hub: common questions

What microcontroller does the Hub use?

The Hub is built around the C2913197, from the ESP32 family.

How big is the Hub PCB?

The Hub measures 60 × 48 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Hub?

55 components, from 31 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 Hub 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 Hub 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 Hub without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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