4 layers73 × 94 mm
4 layers
Board design + code for a raspberry pi based MP3 player, supporting both 3.5mm jack, and LDAC bluetooth encoding.
- Copper layers
- 4
- Thickness
- 1.61 mm
- Parts
- 68
- Nets
- 97
- Pads
- 301
- Tracks, vias
- 23, 4
- Pours
- 5
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 28 Jan 2026
- Updated
- 1 Jul 2026
Overview
MP3 is an open-source printed circuit board by william-richards1, from the william-richards1/MP3player repository on GitHub. It is a 4-layer board with 68 parts on 97 nets, routed with 23 tracks and 4 vias.
It is built around the AK4493SEQ, OPA1622IDRCR and TPS63000DRCR, with the TPS7A2033PDBVR-TP, ABM8-22.5792MHZ-D2Y-T and SP0503BAHTG among its other parts. Its parts include 34 capacitors, 16 resistors, 7 ICs, 3 connectors and 1 diode.
Main components
6
AK4493SEQ
LQFP-48(7x7)LQFP-48(7x7) Digital to Analog Converters (DAC) ROHSAsahi Kasei MicrodevicesUncategorised
OPA1622IDRCR
VSON-10-EP(3x3)-18V~-2V、2V~18V -40℃~+125℃ 0.000149% 142mW×1@32Ω 2 Pairs Differential Inputs 2-Channel 2.6mA Automatic mute/no-noise switch、Enable/shutdown function VSON-10-EP(3x3) Audio Amplifiers ROHSTexas InstrumentsAudio Amplifiers
TPS63000DRCR
SON-10-EP(3.1x3.1)-40℃~+85℃@(TA) 1 1.2V~5.5V 1.5MHz 1.8V~5.5V 50uA Adjustable Buck-Boost Buck-Boost Built-in Yes SON-10-EP(3.1x3.1) DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
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
ABM8-22.5792MHZ-D2Y-T
SMD3225-4PCrystalsAbracon
SP0503BAHTG
SOT-143-55℃~+125℃ 10A@8/20us 14V 150W@8/20us 30pF、60pF 5.5V 6V 80nA ESD IEC 61000-4-2、IEC 61000-4-5、IEC 61000-4-4 Three channels Unidirectional SOT-143 ESD and Surge Protection (TVS/ESD) ROHSTECH PUBLICESD And Surge Protection (TVS/ESD)
README
README.mdMP3player
Parts
68| Qty | Value | Footprint | References |
|---|---|---|---|
| 12 | 10uF | Capacitor_SMD:C_0603_1608Metric | C5, C9, C11, C13, C14, C17, C18, C20, C25, C28, C29, C36 |
| 7 | 0.1uF | Capacitor_SMD:C_0603_1608Metric | C8, C10, C12, C15, C19, C26, C30 |
| 6 | 1uF | Capacitor_SMD:C_0402_1005Metric | C21, C22, C31, C32, C33, C34 |
| 3 | 10k | Resistor_SMD:R_0402_1005Metric | R7, R8, R11 |
| 3 | 5.1k | Resistor_SMD:R_0402_1005Metric | R5, R6, R13 |
| 2 | 0.1uF | Capacitor_SMD:C_0402_1005Metric | C1, C4 |
| 2 | 10 | Resistor_SMD:R_0402_1005Metric | R12, R14 |
| 2 | 4.7uF | Capacitor_SMD:C_0603_1608Metric | C6, C7 |
| 2 | 470uF | Capacitor_SMD:C_0603_1608Metric | C16, C27 |
| 2 | TPS7A20xxxDBV | Package_TO_SOT_SMD:SOT-23-5 | U3, U5 |
| 2 | TestPoint | TestPoint:TestPoint_Pad_D1.0mm | TP1, TP2 |
| 1 | 1.96MΩ | Resistor_SMD:R_0402_1005Metric | R15 |
| 1 | 100 | Resistor_SMD:R_0402_1005Metric | R1 |
| 1 | 100k | Resistor_SMD:R_0402_1005Metric | R10 |
| 1 | 1nF | Capacitor_SMD:C_0402_1005Metric | C35 |
| 1 | 2.0k | Resistor_SMD:R_0402_1005Metric | R4 |
| 1 | 2.49k | Resistor_SMD:R_0402_1005Metric | R2 |
| 1 | 208kΩ | Resistor_SMD:R_0603_1608Metric | R16 |
| 1 | 22uF | Capacitor_SMD:C_0603_1608Metric | C2 |
| 1 | 24.9k | Resistor_SMD:R_0402_1005Metric | R3 |
| 1 | 330k | Resistor_SMD:R_0402_1005Metric | R9 |
| 1 | 47uF | Capacitor_SMD:C_0603_1608Metric | C3 |
| 1 | ABM8-22.5792MHZ-D2Y-T | iclr:ABM810000MHZ12D2W | Y1 |
| 1 | AK4493SEQ | iclr:QFP50P900X900X160-48N | IC2 |
| 1 | Conn_01x02_Male | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | Pogo_pin_USB(OTG)1 |
| 1 | Conn_01x07_Pin | Connector_PinHeader_2.54mm:PinHeader_1x07_P2.54mm_Vertical | J3 |
| 1 | Conn_02x20_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x20_P2.54mm_Vertical | J1 |
| 1 | LPS4012-223MRC | iclr:LPS4012223MRC | L1 |
| 1 | MCP73871-2CCI_ML | iclr:QFN50P400X400X100-21N-D | IC1 |
| 1 | OPA1622IDRCR | iclr:DRC0010J | U2 |
| 1 | SP0503BAHT | Package_TO_SOT_SMD:SOT-143 | D2 |
| 1 | TPS63000DRCR | iclr:DRC0010J | U1 |
| 1 | TPS7A2033PDBVR | Package_TO_SOT_SMD:SOT-23-5 | U4 |
| 1 | Thermistor_NTC 10k | Resistor_SMD:R_0402_1005Metric | TH1 |
| 1 | USB_C_Receptacle_USB2.0 | iclr:USB_C_Receptacle_Palconn_UTC16-G | J2 |
| 1 | WHITE_LED | LED_SMD:LED_0402_1005Metric | USBLED1 |
Questions
What parts does the MP3 use?
68 parts, built around the AK4493SEQ, OPA1622IDRCR, TPS63000DRCR and TPS7A2033PDBVR-TP. 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 MP3 KiCad files?
From the william-richards1/MP3player repository on GitHub, at the commit this page was made from: the board is Hardware/MP3/MP3.kicad_pcb and its schematic Hardware/MP3/MP3.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the MP3 design in my own project?
Its repository states no licence, so its author keeps all rights: ask william-richards1 before reusing the design.
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