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Class d speaker project

iliyanchou·class-d-speaker-project·Schematics and kicad Files/Speaker/Speaker.kicad_pcb

Class d speaker project PCB layout, top view — open source ESP32 board by iliyanchou

About the Class d speaker project PCB

Class d speaker project is an open source ESP32 PCB design by iliyanchou, published on GitHub. It is a 2-layer board measuring 97 × 97.5 mm, with 93 components from 33 distinct parts.

Its main chip is the ESP32, from the ESP32 family. Other key parts include the PCM5102APWR, TDA7439DS13TR and TPA3129D2DAP. By type, the board carries 60 capacitors, 20 resistors, 4 inductors, 3 ICs, 3 connectors and 1 test point.

It belongs with the audio, iot & wireless and power & battery designs in this gallery.

From the project

This repository presents my diploma engineering project: an active speaker system built around a Class-D amplifier.

This repository presents my diploma engineering project: an active speaker system built around a Class-D amplifier.

The project focuses on the design and practical implementation of an active speaker with efficient amplification, wireless audio input, analog input, tone control, and support for external subwoofer connection.

The system combines electronics, acoustics, amplifier theory, digital audio concepts, Bluetooth communication, power supply design, and physical construction.

Main components on the Class d speaker project

PCM5102APWRTDA7439DS13TRTPA3129D2DAP

Class d speaker project bill of materials (BOM)

93 components, 33 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
PCM5102APWR
IC1
1
TDA7439DS13TR
IC2
1
TPA3129D2DAP
IC3
1
~
J2
1
SCREW_TERMINAL_01X04
Screw_Terminal_01x04
J4
1
Screw_Terminal_01x04
J5
1
120kΩ
RV1
1
MUTE
TP1
1
~
µC-ESP32
4
10µH
L1, L2, L3, L4
5
10µF
C1, C3, C6, C13, C33
12
100NF
100nF
C2, C4, C5, C14, C19, C20, C25, C26 +4
4
470NF
470nF
C7, C8, C15, C16
2
2.2NF
2.2nF
C9, C10
4
2.2µF
C11, C12, C29, C30
2
18NF
18nF
C17, C23
2
22NF
22nF
C18, C24
2
5.6NF
5.6nF
C21, C22
1
47µF
C27
8
1NF
1nF
C31, C32, C39, C46, C47, C52, C53, C58
Show 13 more
QtyPartRefs
3
1µF
C34, C35, C36
5
10NF
10nF
C37, C48, C49, C54, C55
2
220µF
C41, C60
4
220NF
220nF
C42, C43, C56, C57
4
680NF
680nF
C44, C45, C50, C51
4
470Ω
R1, R2, R13, R14
1
4.7kΩ
R3
4
10kΩ
R4, R5, R17, R18
2
2.7kΩ
R9, R11
2
5.6kΩ
R10, R12
2
100Ω
R15, R16
1
33Ω
R19
4
3.3Ω
R20, R21, R22, R23

Class d speaker project design files

The KiCad project lives in the iliyanchou/class-d-speaker-project repository on GitHub; these links point at the commit this page was built from.

Class d speaker project: common questions

What microcontroller does the Class d speaker project use?

The Class d speaker project is built around the ESP32, from the ESP32 family.

How big is the Class d speaker project PCB?

The Class d speaker project measures 97 × 97.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Class d speaker project?

93 components, from 33 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Class d speaker project design files?

From the iliyanchou/class-d-speaker-project repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Class d speaker project design in my own project?

The repository has no license, so all rights stay with iliyanchou. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Class d speaker project without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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