2 layers45 × 29 mm
4 layers24.9 × 19.3 mm
Soundoff
xobs/soundoffDisable a USB port when the host is asleep
- Size
- 24.9 × 19.3 mm
- Copper layers
- 4
- Thickness
- 0.8 mm
- Parts
- 29
- Nets
- 70
- Pads
- 174
- Tracks, vias
- 306, 56
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 11 Sep 2025
- Updated
- 2 Jun 2026
Overview
Soundoff is an open-source printed circuit board by xobs, from the xobs/soundoff repository on GitHub. It is a 4-layer board of 24.9 × 19.3 mm with 29 parts on 70 nets, routed with 306 tracks and 56 vias.
It is built around the STM32F042G6U6, XC6206P332MR-G and CH334F, with the EMS4000RSW, TLP3123 and 0603CG300J500NT among its other parts. Its parts include 10 capacitors, 9 resistors, 5 ICs, 3 connectors and 1 diode. It belongs with the STM32 boards of this library.
Main components
9
STM32F042G6U6
UFQFPN-28(4x4)-40℃~+85℃ 1.65V~3.6V 12bit 24 32 Bit 32KB 48MHz 6KB ARM Cortex-M0 Built-in FLASH UFQFPN-28(4x4) Microcontrollers (MCU/MPU/SOC) ROHSSTMicroelectronicsMicrocontrollers (MCU/MPU/SOC)
XC6206P332MR-G
UncategorisedUnknown maker
CH334F
QFN-24(4x4)-40℃~+85℃ 0.4mA 3.3V、5V 4 480Mbps 85mA Hub I2C USB 2.0 QFN-24(4x4) USB HUB Controllers ROHSWCH (Nanjing Qinheng Microelectronics)USB HUB Controllers
EMS4000RSW
QFN-10L(1.4x1.8)Analog Switches - Special PurposeEnergyMath
TLP3123
SOP-4-2.54mmSolid State Relays (MOS Output)Toshiba
0603CG300J500NT
060330pF 50V C0G ±5% 0603 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSGuangdong Fenghua Advanced Tech (FH)Multilayer Ceramic Capacitors MLCC - SMD/SMT
X322512MSB4SI
SMD3225-4P-40℃~+85℃ 12MHz 20pF 80Ω Crystal Oscillator ±10ppm ±20ppm SMD3225-4P Crystals ROHSYXCCrystals
KT-0805G
0805-40℃~+85℃ 100mW 120° 2.6V~3.1V 430mcd 513nm~528nm 525nm 5mA Discrete Diode Emerald Green Water Clear 0805 LED Indication - Discrete ROHSHubei KENTO ElecLED Indication - Discrete13001-UCAM001-X
SMD-40℃~+85℃ 1 10,000 cycles 13.75mm 24P 3A Male Surface Mount, Right Angle Type-C SMD USB Connectors ROHSMINTRONUSB Connectors
README
README.mdSoundoff
Turn off power and data to the USB-C port when the connected host is in suspend.
This device is designed to be built with the cheapest process at JLCPCB.
It requires firmware to be loaded.
Parts
29| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 4.7uF | Capacitor_SMD:C_0402_1005Metric | C1, C2, C3, C6, C12, C13, C14, C15 |
| 6 | R 5.1k 0402 | Resistor_SMD:R_0402_1005Metric | R2, R3, R4, R5, R9, R10 |
| 3 | R 510 0402 | Resistor_SMD:R_0402_1005Metric | R1, R7, R8 |
| 2 | 30pF | Capacitor_SMD:C_0603_1608Metric | C4, C5 |
| 1 | 12 MHz, 20pF | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | 3.3V LDO | Package_TO_SOT_SMD:SOT-23-3 | U1 |
| 1 | CH334F | Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.7x2.7mm | U2 |
| 1 | Debug | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical | J1 |
| 1 | EMS4000RSW | Soundoff:QFN-10_1.4x1.8_Pitch0.4mm | U3 |
| 1 | Green LED | LED_SMD:LED_0805_2012Metric | D1 |
| 1 | STM32F042G6Ux | Package_DFN_QFN:QFN-28_4x4mm_P0.5mm | U4 |
| 1 | Switched USB-C | Soundoff:USB-C-SMD_TYPE-C-31-G-07-1 | P1 |
| 1 | TLP3123 | Package_SO:SO-4_4.4x3.9mm_P2.54mm | U16 |
| 1 | USB-C Receptacle | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J2 |
Questions
How big is the Soundoff PCB?
It measures 24.9 × 19.3 mm and has 4 copper layers, 0.8 mm thick.
What parts does the Soundoff use?
29 parts, built around the STM32F042G6U6, XC6206P332MR-G, CH334F and EMS4000RSW. 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 Soundoff KiCad files?
From the xobs/soundoff repository on GitHub, at the commit this page was made from: the board is Soundoff.kicad_pcb and its schematic Soundoff.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Soundoff design in my own project?
Its repository states no licence, so its author keeps all rights: ask xobs before reusing the design.
Similar boards
- 6 layers44.5 × 36 mm
- 2 layers21 × 67.5 mm
Dabao v3c sdcard
Supermagnum/Galdralag-firmware
A cryptographic framework for Baochip-1x .
44 parts3GPL-3.0 - 4 layers187.9 × 60.2 mm
MotionModuleSTM32F103R8
griffotron/MotionModuleSTM32R8
PCB design and code for the STM32 powered Motion Module that controls 14 stepper motors
246 parts13MIT - 4 layers51 × 42 mm
Nano Tek
stefanskotte/Nano-Tek
A tiny, modern reimagining of the classic Gotek floppy-disk-drive emulator. Nano-Tek keeps the full feature set of a Gotek-style FDD emulator but packs it onto a board that is a fraction of the size, hence the name…
58 parts7 - 6 layers160 × 120 mm
Pic32main
JuanPoueriet/automatic-spork
Máquina de ruleta física de casino. 6 PCBs: pic32main (cerebro), wheel (rueda de LEDs), displaysa/b/c (paneles de 7 segmentos en cascada) y buttons (botonera).
256 parts - 4 layers64 × 115 mm
- 4 layers262.9 × 64.4 mm
MorphoDock
SlimeVR/SlimeVR-Morphocharger
SlimeVR Official charger design for butterfly trackers
188 parts1Apache-2.0