4 layers140 × 80 mm
24V High Side Driver
tracelabs-pcb/can-do12
4-Layer IC-Gate-Driver for industrial application - Kicad, TPS274160, CANBUS
147 parts
4 layers70 × 45 mm
Usb audio interface
tracelabs-pcb/usb-audio-interfaceUSB-C Audio Interface PCB — UAC2, Headset, Mic Preamp — KiCad 4-Layer
- Size
- 70 × 45 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 110
- Nets
- 99
- Pads
- 404
- Tracks, vias
- 678, 140
- Pours
- 33
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 24 Mar 2026
- Updated
- 24 Mar 2026
Overview
Usb audio interface is an open-source printed circuit board by tracelabs-pcb, from the tracelabs-pcb/usb-audio-interface repository on GitHub. It is a 4-layer board of 70 × 45 mm with 110 parts on 99 nets, routed with 678 tracks and 140 vias.
It is built around the ATTINY1616-MN, PCM2912APJTR and TPA6130A2RTJR, with the TPS62150ARGT, TPD4E05U06DQAR and 74LVC1G74DC,125-JSM among its other parts. Its parts include 42 resistors, 36 capacitors, 9 ICs, 7 connectors and 6 diodes. It belongs with the audio and music and interfaces and adapters boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
12
ATTINY1616-MN
QFN-20-EP(3x3)-40℃~+105℃ 1.8V~5.5V 10bit 16KB 18 20MHz 256Byte 2KB 8 Bit 8bit AVR Built-in FLASH QFN-20-EP(3x3) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
PCM2912APJTR
TQFP-32_7x7-25℃~+70℃ 5V 8kHz、10.025kHz、16kHz、22.05kHz、32kHz、44.1kHz、48kHz Encoder/decoder USB TQFP-32(7x7) Audio Interface ICs ROHSTexas InstrumentsAudio Interface ICs
TPA6130A2RTJR
QFN-20-EP(4x4)-40℃~+85℃ -90dB 0.0055% 2 Pairs Differential Inputs 2-Channel 2.5V~5.5V 290mWx1@16Ω 4mA 98dB Automatic mute/no-noise switch、Enable/shutdown function、ESD protection、Digitally programmable gain Class AB QFN-20-EP(4x4) Audio Amplifiers ROHSTexas InstrumentsAudio Amplifiers
TPS62150ARGT
VQFN-16-EP(3x3)-40℃~+85℃@(TA) 1 17uA 1A 2.5MHz 3V~17V 900mV~6V Adjustable Buck Buck Built-in Yes VQFN-16-EP(3x3) DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
TPD4E05U06DQAR
USON-10-40℃~+125℃ 0.5pF 10nA 14V 2.5A@8/20us 40W@8/20us 5.5V 6.5V ESD Four channels IEC 61000-4-2、IEC 61000-4-5、IEC 61000-4-4 Unidirectional USON-10(1x2.5) ESD and Surge Protection (TVS/ESD) ROHSTexas InstrumentsESD Protection Devices
74LVC1G74DC,125-JSM
VSSOP-8-40℃~+125℃ 1 1.1ns 1.65V~5.5V 1ns 200MHz 24mA 24mA 4pF 4uA 74LVC Asynchronous Complementary Rising Edge Set and Reset VSSOP-8 Flip Flops ROHSJSMSEMIFlip Flops
TPD2EUSB30DRT
SOT(9x3)-40℃~+85℃ 0.7pF 2 45W 5.5V 5A@8/20us 7V 8V ESD IEC 61000-4-2、IEC 61000-4-5 Unidirectional SOT(9x3) ESD and Surge Protection (TVS/ESD) ROHSTexas InstrumentsESD And Surge Protection (TVS/ESD)
TPS7A2033PDBVR-TP
SOT-23-5-40℃~+85℃ 1 180uV@(300mA) 2uA 3.3V 300mA 5.5V 75dB@(1kHz) Fixed Over Current Protection、Enable、Thermal Shutdown Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTECH PUBLICUncategorised
150080RV54050
SMD-4P,2x1.2mmUncategorisedWürth Elektronik
BAT54A
SOT-231 Pair Common Anode 200mA 2uA@25V 30V 600mA 800mV@100mA SOT-23 Schottky Diodes ROHSNexperiaSchottky Diodes
CSTCR6M00G55Z-R0
SMD4520-3PCeramic ResonatorsMurataFC68125
-Audio Connectors (Headphones)Cliff
README
README.mdUSB-C Audio Interface — Desktop / Streaming / Meetings
Status: PCB-Design abgeschlossen — unbestückt
Tool: KiCad | Layer: 4-Layer | Hersteller-ready: Ja
Projektbeschreibung
Kompaktes USB-C Audio-Interface für Desktop, Streaming und Meetings. Wird am PC/Mac/Linux als Standard-USB-Audio-Device (UAC2) erkannt, ohne Treiber. Entwickelt als reproduzierbarer Prototyp mit sauberem Mixed-Signal-Layout (Analog + Digital).
Besonderheiten:
- USB Audio Class 2 (UAC2) — Plug & Play, treiberlos
- Stereo Kopfhörerverstärker mit I²C-Lautstärkeregelung (DirectPath)
- Elektret-Mikrofon-Bias + Hardware-Mute
- Rotary Encoder für Lautstärke + Mute
- Getrennte Digital/Analog-Versorgung (Buck → 3V3D → LDO → 3V3A)
- ESD-Schutz USB + Audio
- Testpunkte für alle kritischen Rails und Signale
Hardware
| Komponente | Beschreibung |
|---|---|
| USB Audio Codec | PCM2912APJTR (ADC + DAC, USB-Enumeration integriert) |
| Kopfhörerverstärker | TPA6130A2RTJR (Stereo, I²C Volume, DirectPath/Capless) |
| Steuer-MCU | ATtiny1616 (Encoder, I²C, Button Handling) |
| Buck Converter | TPS62150A (5V → 3.3V Digital) |
| Analog LDO | TPS7A2033PDBVR (3.3V Digital → 3.3V Analog, Low-Noise) |
| ESD-Schutz | TPD4E05U06DQAR (USB, Audio, GPIO) |
| Stackup | 4-Layer (Signal / GND-Plane / Power / Signal+Pour) |
| Tool | KiCad |
Anschlüsse
- USB-C — Daten + Versorgung (Bus-Powered)
- TRRS 3.5mm Klinke CTIA (Headset: Mic + L/R + GND)
- Rotary Encoder (Lautstärke + Mute)
- LEDs: Power, Mic-Mute, Clip/Status
- I²C Header (OLED / Erweiterung)
- GPIO Header
- UPDI Header (ATtiny Programmierung)
Architektur
Versorgung: USB 5V → Buck (TPS62150A) → 3V3 Digital → LDO (TPS7A2033) → 3V3 Analog
Signalführung:
- USB D+/D− als Differential Pair
- Audio-Pfade kurz, getrennt von Digital
- Keine GND-Splits — gemeinsame GND-Plane (L2 durchgehend)
Testpunkte: 5V, 3V3D, 3V3A, GND, USB D+/D−, Audio-Nodes
Ausschlüsse
Kein Serienprodukt — kein CE/EMV, keine Normenfreigabe, keine sicherheitskritischen Funktionen.
Dateien in diesem Repository
/kicad/— KiCad Projektdateien/screenshots/— PCB- und Schematic-Ansichten
Entwickelt von Shawn Schneider
— PCB-Design & Lötservice, Wolfsburg
Parts
110| Qty | Value | Footprint | References |
|---|---|---|---|
| 13 | 1µF | Capacitor_SMD:C_0603_1608Metric | C5, C6, C7, C13, C14, C16, C17, C18, C19, C22, C28, C32, C37 |
| 10 | 100Ω | Resistor_SMD:R_0603_1608Metric | R31, R32, R35, R36, R37, R38, R39, R40, R41, R42 |
| 7 | 100nF | Capacitor_SMD:C_0603_1608Metric | C4, C22, C23, C24, C27, C33, C38 |
| 5 | 10kΩ | Resistor_SMD:R_0603_1608Metric | R17, R18, R29, R30, R33 |
| 4 | 0,47µF | Capacitor_SMD:C_0603_1608Metric | C25, C26, C29, C31 |
| 4 | 100kΩ | Resistor_SMD:R_0603_1608Metric | R8, R14, R19, R28 |
| 4 | 22Ω | Resistor_SMD:R_0603_1608Metric | R1, R2, R23, R24 |
| 3 | 1,5kΩ | Resistor_SMD:R_0603_1608Metric | R3, R4, R5 |
| 3 | 4,7kΩ | Resistor_SMD:R_0603_1608Metric | R25, R26, R27 |
| 3 | Conn_01x04_Pin | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J5, J6, J7 |
| 2 | 100pF | Capacitor_SMD:C_0402_1005Metric | C1, C2 |
| 2 | 10nF | Capacitor_SMD:C_0603_1608Metric | C34, C35 |
| 2 | 10µF | Capacitor_SMD:C_0805_2012Metric | C8, C36 |
| 2 | 3,3µF | Capacitor_SMD:C_0805_2012Metric | C3, C21 |
| 2 | 33Ω | Resistor_SMD:R_0603_1608Metric | R12, R13 |
| 2 | 4,7Ω | Resistor_SMD:R_0603_1608Metric | R15, R21 |
| 2 | 430Ω | Resistor_SMD:R_0603_1608Metric | R20, R22 |
| 2 | 5,1kΩ | Resistor_SMD:R_0603_1608Metric | R43, R44 |
| 2 | RED | Eigene Footprints:SM0805HCL_BIV | D1, D4 |
| 2 | TPD4E05U06DQA | Package_SON:USON-10_2.5x1.0mm_P0.5mm | U7, U8 |
| 1 | 1,21MΩ | Resistor_SMD:R_0603_1608Metric | R9 |
| 1 | 150080RV54050 | Eigene Footprints:150080RV54050 | LED1 |
| 1 | 1MΩ | Resistor_SMD:R_0603_1608Metric | R11 |
| 1 | 1uF | Capacitor_SMD:C_0603_1608Metric | C15 |
| 1 | 1µH | Inductor_SMD:L_1008_2520Metric | L1 |
| 1 | 2,2kΩ | Resistor_SMD:R_0603_1608Metric | R16 |
| 1 | 2,2µH | WÜ 744028002 | Eigene Footprints:WE-TPC_282892 | L2 |
| 1 | 220nF | Capacitor_SMD:C_0603_1608Metric | C20 |
| 1 | 22µF | Capacitor_SMD:C_1206_3216Metric | C12 |
| 1 | 3,3nF | Capacitor_SMD:C_0603_1608Metric | C11 |
| 1 | 383kΩ | Resistor_SMD:R_0603_1608Metric | R10 |
| 1 | 74LVC1G74DC,125 | Eigene Footprints:SOP50P310X100-8N | IC3 |
| 1 | 910Ω | Resistor_SMD:R_0603_1608Metric | R45 |
| 1 | ATtiny1616-M | Package_DFN_QFN:VQFN-20-1EP_3x3mm_P0.4mm_EP1.7x1.7mm | U1 |
| 1 | BAT54A | Package_TO_SOT_SMD:SOT-23 | D3 |
| 1 | BLM18PG121SN1D | Resistor_SMD:R_0603_1608Metric | FB1 |
| 1 | CSTCR6M00G55Z-R0 | Eigene Footprints:OSC_CSTCR6M00G55Z-R0 | Y1 |
| 1 | Conn_01x03_Pin | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J4 |
| 1 | FC68125 | Eigene Footprints:CLIFF_FC68125 | J1 |
| 1 | Green_PWR | Eigene Footprints:SM0805HCL_BIV | D7 |
| 1 | Littelfuse SMF5.0A | Diode_SMD:D_SOD-123 | D6 |
| 1 | MF-NSMF075/13X-2 | Eigene Footprints:MFNSMF07513X2 | F1 |
| 1 | PCM2912APJTR | Eigene Footprints:QFP80P900X900X120-32N | IC1 |
| 1 | PEC11R-4220F-S0024 | Eigene Footprints:XDCR_PEC11R-4220F-S0024 | S2 |
| 1 | PESD5V0X2UAMB | Eigene Footprints:DFN10006B-3_SOT883B_NEX | CR1 |
| 1 | SJ1-3523N | Eigene Footprints:CUI_SJ1-3523N | J3 |
| 1 | TPA6130A2RTJR | Eigene Footprints:QFN50P400X400X80-21N | U2 |
| 1 | TPD2EUSB30 | Package_TO_SOT_SMD:Texas_DRT-3 | U3 |
| 1 | TPS62150A | Package_DFN_QFN:VQFN-16-1EP_3x3mm_P0.5mm_EP1.68x1.68mm_ThermalVias | U4 |
| 1 | TPS7A2033PDBVR | Package_TO_SOT_SMD:SOT-23-5 | IC2 |
| 1 | TS02-66-120-BK-160-LCR-D | Eigene Footprints:TS0266120BK160LCRD | S3 |
| 1 | UJ20-C-H-G-SMT-TR | Eigene Footprints:CUI_UJ20-C-H-G-SMT-TR | J8 |
The 108 most common of 110 parts.
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Questions
How big is the Usb audio interface PCB?
It measures 70 × 45 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Usb audio interface use?
110 parts, built around the ATTINY1616-MN, PCM2912APJTR, TPA6130A2RTJR and TPS62150ARGT. 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 Usb audio interface KiCad files?
From the tracelabs-pcb/usb-audio-interface repository on GitHub, at the commit this page was made from: the board is kicad/USB-Audio-Interface.kicad_pcb and its schematic kicad/Flipflop.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Usb audio interface design in my own project?
Its repository states no licence, so its author keeps all rights: ask tracelabs-pcb before reusing the design.