4 layers65 × 56.1 mm Mhd314, the printed circuit board in 3D

Mhd314

mahaudio DAC for the RaspberryPi

Size: 65 × 56.1 mm
Copper layers: 4
Thickness: 1.59 mm
Parts: 195
Nets: 113
Pads: 631
Tracks, vias: 1,033, 200
Pours: 6
Routed: Yes
KiCad: KiCad 8.0 (file 20240108)
Created: 1 Aug 2024
Updated: 16 Apr 2025

Overview

Mhd314 is an open-source printed circuit board by yanava, from the yanava/mhd314 repository on GitHub, published under the BSD-3-Clause licence. It is a 4-layer board of 65 × 56.1 mm with 195 parts on 113 nets, routed with 1,033 tracks and 200 vias.

It is built around the ES9038Q2M, TPS65131RGE and AT24CS64-SSHM-B, with the BAV99, MBR130T1G and AO3401A among its other parts. Its parts include 78 resistors, 59 capacitors, 12 ICs, 11 diodes and 4 connectors. It belongs with the audio and music boards of this library.

Main components

README

README.md

Mahaudio MHD314 Audio DAC for the RaspberryPi

This is a hardware project for an open Hi-Fi DAC design for the RaspberryPi. MHD stands for Mahaudio Hi-Fi DAC and 314 is an obvious reference to the Pi.

Description

This is a project conducted through a series of YouTube live events, which can be accessed on the following playlist: https://www.youtube.com/watch?v=isWnR_Fm9iQ&list=PLo5SrSJMaUGJOzglfgmpuGIEasF4YtCA1&pp=iAQB - Portuguese language only for now. The purpose is educational, to show audio enthusiasts what is the necessary work to develop and integrate a product.

Presentations

All presentations used on the live events are available under the Documentation folder.

License

This project is licensed under the BSD-3 License.

Parts

195

Qty	Value	Footprint	References
21	TestPoint	TestPoint:TestPoint_Pad_D1.0mm	TP1, TP2, TP3, TP4, TP10, TP11, TP12, TP13, TP14, TP15, TP16, TP17, TP18, TP19, TP20, TP21 +5
17	100nF	Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder	C1, C10, C15, C16, C22, C25, C26, C29, C31, C41, C48, C49, C60, C61, C64, C65 +1
16	1uF	Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C3, C4, C5, C6, C7, C8, C11, C12, C17, C18, C21, C23, C24, C30, C50, C51
16	820pF	Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C2, C13, C14, C19, C20, C32, C33, C34, C35, C36, C52, C53, C54, C55, C56, C57
14	10k	Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R10, R11, R12, R14, R15, R16, R33, R65, R78, R79, R80, R81, R82, R83
12	430R	Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R27, R28, R31, R32, R37, R38, R41, R42, R49, R50, R51, R52
12	470R	Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R25, R26, R29, R30, R35, R36, R39, R40, R45, R46, R47, R48
8	0R	Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R5, R6, R7, R17, R18, R19, R20, R64
7	22R	Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R1, R2, R3, R4, R13, R34, R66
6	BAV99	Package_TO_SOT_SMD:SOT-23	D6, D7, D8, D9, D10, D11
5	720R	Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R60, R61, R71, R72, R73
4	1.05k	Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R21, R22, R23, R24
4	240R	Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R44, R54, R62, R63
4	3.9k	Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R8, R9, R84, R85
4	MountingHole	MountingHole:MountingHole_2.7mm_M2.5_DIN965_Pad	H1, H2, H3, H4
3	22uF	Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C39, C46, C47
3	LM317_SOT-223	Package_TO_SOT_SMD:SOT-223-3_TabPin2	U5, U6, U8
3	OPA1622	Package_SON:Texas_S-PVSON-N10	U4, U11, U13
2	1M	Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R55, R59
2	390R	Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R43, R53
2	4.7uF	Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C37, C40
2	4.7uH	mahaudio KiCad Library:WE-MAPI_4030	L1, L2
2	MBR130T1G	mahaudio KiCad Library:SOD-123_425-04_ONS	D1, D2
2	OPA1612AxD	Package_SO:SOIC-8_3.9x4.9mm_P1.27mm	U2, U3
2	White	LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder	D3, D4
1	100R	Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R57
1	10nF	Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder	C44
1	150k	Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R58
1	178k	Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R56
1	1k	Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R67
1	220nF	Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder	C42
1	4.7nF	Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder	C45
1	6.8pF	Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder	C38
1	7.5pF	Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder	C43
1	AO3401A	Package_TO_SOT_SMD:SOT-23	Q1
1	ASE-50MHz	Oscillator:Oscillator_SMD_Abracon_ASE-4Pin_3.2x2.5mm	Y1
1	AT24CS64-SSHM	Package_SO:SOIC-8_3.9x4.9mm_P1.27mm	U10
1	AudioJack4	mahaudio KiCad Library:TENSILITY_54-00176	J4
1	AudioJack_Pentaconn	mahaudio KiCad Library:Jack_4.4mm_G-Switch_GT-3321667P-01_Horizontal	J2
1	Conn_01x02_Pin	Connector_PinHeader_1.00mm:PinHeader_1x02_P1.00mm_Vertical	J3
1	ES9038Q2M	mahaudio KiCad Library:QFN-30_EP_3x5_Pitch0.4mm	U1
1	LM337_SOT223	Package_TO_SOT_SMD:SOT-223-3_TabPin2	U9
1	LOGO	LOGO	G***
1	Raspberry_Pi_2_3	Connector_PinSocket_2.54mm:PinSocket_2x20_P2.54mm_Vertical	J1
1	Red	LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder	D5
1	SW_Push	Button_Switch_THT:SW_Tactile_SPST_Angled_PTS645Vx39-2LFS	SW1
1	TPS65131RGE	Package_DFN_QFN:VQFN-24-1EP_4x4mm_P0.5mm_EP2.45x2.45mm_ThermalVias	U7

Questions

How big is the Mhd314 PCB?

It measures 65 × 56.1 mm and has 4 copper layers, 1.59 mm thick.

What parts does the Mhd314 use?

195 parts, built around the ES9038Q2M, TPS65131RGE, AT24CS64-SSHM-B and BAV99. 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 Mhd314 KiCad files?

From the yanava/mhd314 repository on GitHub, at the commit this page was made from: the board is PCB/mhd314.kicad_pcb and its schematic PCB/BalDiffAmp.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Mhd314 design in my own project?

Its repository publishes it under the BSD-3-Clause licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).

Category and platform

Audio and music

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/yanava-mhd314" title="Mhd314 in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>

A picture

<img src="https://pcbkit.io/embed/boards/yanava-mhd314.jpg" alt="Mhd314" width="1200" height="900">

A picture that opens the board, for a README

[![Mhd314](https://pcbkit.io/embed/boards/yanava-mhd314.jpg?size=s)](https://pcbkit.io/boards/yanava-mhd314)

Source

Repository: yanava/mhd314
Board file: PCB/mhd314.kicad_pcb
Commit: 977c5ab
Licence: BSD-3-Clause

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