2 layers20.1 × 27.2 mm
6 layers69.7 × 22.9 mm
AudioPlayground
LENS-TUGraz/pcbsCollection of ITI related PCBs
- Size
- 69.7 × 22.9 mm
- Copper layers
- 6
- Thickness
- 1.6 mm
- Parts
- 153
- Nets
- 192
- Pads
- 633
- Tracks, vias
- 1,639, 468
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 22 Oct 2025
- Updated
- 24 Aug 2026
Overview
AudioPlayground is an open-source printed circuit board by LENS-TUGraz, from the LENS-TUGraz/pcbs repository on GitHub. It is a 6-layer board of 69.7 × 22.9 mm with 153 parts on 192 nets, routed with 1,639 tracks and 468 vias.
It is built around the R7FA4M2AB3CNE#AA0, MAX9867ETJ+ and USB2422/MJ, with the DMM-4326-T-R, GTD3526BA-1N and AP2280-1WG among its other parts. Its parts include 62 capacitors, 32 resistors, 20 ICs, 7 connectors and 5 diodes. It belongs with the nRF52 and nRF5x boards of this library.
Main components
11
R7FA4M2AB3CNE#AA0
HWQFN-48(7x7)-40℃~+105℃ 100MHz 12bit 12bit 2.7V~3.6V 254KB 30 32 Bit 8KB ARM Cortex-M33 Built-in FLASH HWQFN-48(7x7) Microcontrollers (MCU/MPU/SOC) ROHSRenesas ElectronicsMicrocontrollers (MCU/MPU/SOC)MAX9867ETJ+
TQFN-32(5x5)-40℃~+85℃ 1.65V~1.95V、1.65V~3.6V 8kHz~48kHz Encoder/decoder Serial、I2C TQFN-32(5x5) Audio Interface ICs ROHSMaxim Integrated (Analog Devices)Audio Interface ICs
USB2422/MJ
QFN-24-EP(4x4)2 3.3V Hub USB 2.0 QFN-24-EP(4x4) USB HUB Controllers ROHSMicrochip TechnologyUSB Converters
DMM-4326-T-R
-1.5V~3.6V 57dB 800uA Omnidirectional - MEMS Microphones ROHSPUI Audio, Inc.MEMS MicrophonesGTD3526BA-1N
SMD-26dB 0.98mm 1.62V~3.6V 2.65mm 3.5mm 65dB 770uA Omnidirectional SMD MEMS Microphones ROHSGettopMEMS Microphones
AP2280-1WG
SOT-25-5-40℃~+85℃ 1 1.5V~6V 2A 80mΩ Active High High Side Switch SOT-25-5 Power Distribution Switches ROHSDiodes IncorporatedPower Distribution Switches
TS3USB221ARSER-HXY
UQFN-10(1.5x2)0℃~+85℃ 1.1GHz 1.2us 10Ω 2 2.5V~5.5V 200ps 20us 2:1 4pF USB、Cellular、Computer UQFN-10(1.5x2) Analog Switches - Special Purpose ROHSHXY MOSFETAnalog Switches - Special Purpose
USBLC6-2P6
SOT-666-6-40℃~+125℃ 150nA 17V 2 3.5pF 5.25V 5A@8/20us 6V ESD IEC 61000-4-2 Unidirectional SOT-666-6 ESD and Surge Protection (TVS/ESD) ROHSSTMicroelectronicsESD And Surge Protection (TVS/ESD)XC6209F182MR-G
SOT-25-40℃~+85℃@(Ta) 1 1.8V 10V 210mV@(30mA) 25uA 300mA 70dB@(10kHz) Fixed Over Current Protection、Enable、Short Circuit Protection Positive SOT-25 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTorex SemiconductorVoltage Regulators - Linear, Low Drop Out (LDO) RegulatorsXC6209F332MR-G
SOT-25-5-40℃~+85℃@(Ta) 1 10V 25uA 3.3V 300mA 60mV@(30mA)、200mV@(100mA) 70dB@(10kHz) Fixed Over Current Protection、Over Temperature Protection、Short Circuit Protection Positive SOT-25-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTorex SemiconductorVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
ADWH004
SMD,8x3mm-40℃~+80℃ 1.39、1.69 100MHz、800MHz 1mm 2.45GHz、5.5GHz 3.35dBi、4.62dBi 3W 3mm 50Ω 8mm Patch Antenna SMD,8x3mm Antennas ROHSMyAntennaAntennas
README
pcbs/AudioPlayground/README.mdLE Audio Playground
An open hardware platform for Bluetooth LE Audio research, prototyping, and teaching.
The LE Audio Playground is a compact development platform designed to make experimenting with Bluetooth LE Audio simple and accessible. Built around the Nordic nRF5340, it combines a powerful Bluetooth SoC with stereo audio, integrated debugging, USB connectivity, battery operation, and flexible expansion in a single open hardware platform.
Designed at Graz University of Technology, the board provides a practical foundation for LE Audio research, prototyping, and education while remaining fully open and easy to extend.
Highlights
- Nordic nRF5340 dual-core Bluetooth SoC
- MAX9867 stereo audio codec
- Analog audio input and output
- USB Audio connectivity
- Onboard digital PDM microphones
- Integrated SEGGER J-Link debugging and programming
- Single USB-C connection
- USB and LiPo/Li-ion battery operation
- Onboard antenna
- Expansion headers for custom hardware and audio interfaces
- Fully open KiCad hardware design
Open Hardware
The complete schematic is available as a PDF, and the full PCB design is included in this repository and can be modified directly in KiCad.
Parts
153| Qty | Value | Footprint | References |
|---|---|---|---|
| 22 | 100nF | Capacitor_SMD:C_0402_1005Metric | C2, C3, C11, C12, C13, C14, C15, C16, C17, C18, C21, C25, C27, C28, C29, C30 +6 |
| 20 | 1uF | Capacitor_SMD:C_0402_1005Metric | C4, C10, C19, C31, C33, C34, C35, C37, C38, C39, C42, C45, C47, C49, C51, C52 +4 |
| 13 | 10k | Resistor_SMD:R_0402_1005Metric | R3, R4, R5, R6, R11, R15, R16, R17, R20, R21, R22, R26, R27 |
| 5 | SN74LVC1G66DRYR | C507245:SN74LVC1G66DRYR | U11, U13, U16, U17, U21 |
| 4 | 150R | Resistor_SMD:R_0402_1005Metric | R18, R30, R31, R33 |
| 3 | 330R | Resistor_SMD:R_0402_1005Metric | R8, R24, R25 |
| 3 | 5.1k | Resistor_SMD:R_0402_1005Metric | R2, R13, R19 |
| 2 | 10pF | Capacitor_SMD:C_0402_1005Metric | C22, C24 |
| 2 | 10uF | Capacitor_SMD:C_0402_1005Metric | C26, C58 |
| 2 | 10uH | Inductor_SMD:L_0402_1005Metric | L1, L2 |
| 2 | 18pF | Capacitor_SMD:C_0402_1005Metric | C36, C46 |
| 2 | 2.2k | Resistor_SMD:R_0402_1005Metric | R7, R14 |
| 2 | 220nF | Capacitor_SMD:C_0402_1005Metric | C54, C57 |
| 2 | 220uF | Capacitor_SMD:C_1206_3216Metric | C55, C56 |
| 2 | 4.7k | Resistor_SMD:R_0402_1005Metric | R9, R10 |
| 2 | 4.7uF | Capacitor_SMD:C_0402_1005Metric | C5, C6 |
| 2 | 470nF | Capacitor_SMD:C_0402_1005Metric | C40, C41 |
| 2 | Conn_01x07_Socket | Connector_PinSocket_2.54mm:PinSocket_1x07_P2.54mm_Vertical | J1, J9 |
| 2 | DMM-4326-T-R | DMM-4326-T-R:DMM-4326-T-R | U7, U8 |
| 2 | GTD3526BA-1N | GTD3526BA-1N:GTD3526BA-1N | U19, U20 |
| 2 | LOGO | LOGO | G***, G*** |
| 2 | NC | Capacitor_SMD:C_0402_1005Metric | C60, C65 |
| 2 | green | LED_SMD:LED_0402_1005Metric | D2, D3 |
| 2 | orange | LED_SMD:LED_0402_1005Metric | D0, D5 |
| 1 | |||
| 1 | 0.7pF | Capacitor_SMD:C_0402_1005Metric | C23 |
| 1 | 0R | Resistor_SMD:R_0402_1005Metric | R28 |
| 1 | 10nF | Capacitor_SMD:C_0402_1005Metric | C1 |
| 1 | 12k | Resistor_SMD:R_0402_1005Metric | R12 |
| 1 | 12mHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y2 |
| 1 | 1M | Resistor_SMD:R_0402_1005Metric | R34 |
| 1 | 2.2R | Resistor_SMD:R_0402_1005Metric | R1 |
| 1 | 2.2nF | Capacitor_SMD:C_0402_1005Metric | C9 |
| 1 | 2.2nH | Inductor_SMD:L_0402_1005Metric | L3 |
| 1 | 2.2uF | Capacitor_SMD:C_0402_1005Metric | C32 |
| 1 | 24MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y3 |
| 1 | 32.768kHz | Crystal:Crystal_SMD_3215-2Pin_3.2x1.5mm | Y4 |
| 1 | 32MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | 75R | Resistor_SMD:R_0402_1005Metric | R23 |
| 1 | ADWH004 | ADWH004:ADWH004 | L4 |
| 1 | AP2280 | Package_TO_SOT_SMD:SOT-23-5 | U12 |
| 1 | BCLK | TestPoint:TestPoint_Pad_D1.0mm | TP4 |
| 1 | Conn_01x12_Pin | Connector_PinSocket_2.54mm:PinSocket_1x12_P2.54mm_Vertical | J5 |
| 1 | Conn_01x16_Pin | Connector_PinSocket_2.54mm:PinSocket_1x16_P2.54mm_Vertical | J7 |
| 1 | Conn_Battery | S2B_PH_SM4_TB:JST_S2B-PH-SM4-TB | J2 |
| 1 | LM66200DRLR | LM662:LM662 | U9 |
| 1 | LRCLK | TestPoint:TestPoint_Pad_D1.0mm | TP5 |
| 1 | MAX9867 | MAX9867:MAX9867 | U4 |
| 1 | MCLK | TestPoint:TestPoint_Pad_D1.0mm | TP3 |
| 1 | MCP73831-2-OT | Package_TO_SOT_SMD:SOT-23-5 | U10 |
| 1 | R7FA4M2AB3CNE | PWQN0048KC-A_REN:PWQN0048KC-A_REN | U2 |
| 1 | RX | TestPoint:TestPoint_Pad_D1.0mm | TP11 |
| 1 | SCL | TestPoint:TestPoint_Pad_D1.0mm | TP2 |
| 1 | SDA | TestPoint:TestPoint_Pad_D1.0mm | TP1 |
| 1 | SDIN | TestPoint:TestPoint_Pad_D1.0mm | TP6 |
| 1 | SDOUT | TestPoint:TestPoint_Pad_D1.0mm | TP7 |
| 1 | SWDCLK | TestPoint:TestPoint_Pad_D1.0mm | TP9 |
| 1 | SWDIO | TestPoint:TestPoint_Pad_D1.0mm | TP8 |
| 1 | SW_Push | Button_Switch_SMD:SW_SPST_B3U-1000P | RESET1 |
| 1 | TC2030 | Connector:Tag-Connect_TC2030-IDC-NL_2x03_P1.27mm_Vertical | J4 |
| 1 | TS3USB221ARSER | TS3USB221A:TS3USB221A | U14 |
| 1 | TX | TestPoint:TestPoint_Pad_D1.0mm | TP10 |
| 1 | USB2422/MJ | USB2422:USB2422 | U3 |
| 1 | USBLC6-2P6 | Package_TO_SOT_SMD:SOT-666 | U15 |
| 1 | USB_C_Receptacle_USB2.0_14P | Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J3 |
| 1 | XC6209F182MR | Package_TO_SOT_SMD:SOT-23-5_HandSoldering | U6 |
| 1 | XC6209F332MR | Package_TO_SOT_SMD:SOT-23-5_HandSoldering | U5 |
| 1 | blue | LED_SMD:LED_0402_1005Metric | D1 |
| 1 | nRF5340-QKxx | Package_DFN_QFN:Nordic_AQFN-94-1EP_7x7mm_P0.4mm | U1 |
The 149 most common of 153 parts.
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Questions
How big is the AudioPlayground PCB?
It measures 69.7 × 22.9 mm and has 6 copper layers, 1.6 mm thick.
What parts does the AudioPlayground use?
153 parts, built around the R7FA4M2AB3CNE#AA0, MAX9867ETJ+, USB2422/MJ and DMM-4326-T-R. 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 AudioPlayground KiCad files?
From the LENS-TUGraz/pcbs repository on GitHub, at the commit this page was made from: the board is pcbs/AudioPlayground/AudioPlayground.kicad_pcb and its schematic pcbs/AudioPlayground/AudioPlayground.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the AudioPlayground design in my own project?
Its repository states no licence, so its author keeps all rights: ask LENS-TUGraz before reusing the design.