2 layers96.9 × 104.6 mm Classdamp, the printed circuit board in 3D

Classdamp

rysiu2007/Class-D-amplifier

It is a class D amplifier using discreete components for the PWM stage with 200kHz switching frequency.

Size: 96.9 × 104.6 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 103
Nets: 51
Pads: 262
Tracks, vias: 375, 11
Pours: 16
Routed: Yes
KiCad: KiCad 10.0 (file 20260206)
Created: 11 Jul 2026
Updated: 22 Jul 2026

Overview

Classdamp is an open-source printed circuit board by rysiu2007, from the rysiu2007/Class-D-amplifier repository on GitHub, published under the MIT licence. It is a 2-layer board of 96.9 × 104.6 mm with 103 parts on 51 nets, routed with 375 tracks and 11 vias.

It is built around the SS14, IPD135N03LGATMA1 and S8050, with the S8550 among its other parts. Its parts include 44 resistors, 28 capacitors, 16 transistors, 7 diodes and 3 connectors. It belongs with the audio and music boards of this library.

Main components

README

README.md

Class-D Amplifier Learning Project

A discrete $200\text{kHz}$ triangle wave generator and Class-D amplifier stage built for learning analog layout and circuit design.

Current Status

Simulation: LTspice transient simulations are verified but yet to finish.
Hardware: KiCad PCB design is currently underway, optimized for single-layer hand-etching.

Parts

103

Qty	Value	Footprint	References
13	100n	Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm	C4, C5, C6, C7, C8, C17, C18, C19, C20, C23, C24, C27, C28
12	1n	Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm	C1, C9, C10, C11, C12, C13, C14, C15, C21, C22, C25, C26
7	1k	Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P2.54mm_Vertical	R14, R19, R20, R21, R22, R26, R27
6	SS14	Diode_SMD:D_SMA_Handsoldering	D2, D3, D4, D5, D6, D7
5	1k	Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P15.24mm_Horizontal	R3, R4, R10, R11, R12
4	10k	Library:R_Axial_DIN0204_L3.6mm_D1.6mm_P2.54mm_Vertical	R25, R30, R39, R40
4	1k	Library:R_Axial_DIN0204_L3.6mm_D1.6mm_P2.54mm_Vertical	R31, R32, R37, R38
4	2N5551	Package_TO_SOT_THT:TO-92_Inline	Q2, Q3, Q15, Q16
4	5k	Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P2.54mm_Vertical	R15, R16, R17, R18
4	IPD135N03LGATMA1	Package_TO_SOT_SMD:TO-252-2	Q7, Q8, Q9, Q10
4	S8050	Package_TO_SOT_THT:TO-92_Inline	Q4, Q5, Q11, Q13
4	S8550	Package_TO_SOT_THT:TO-92_Inline	Q1, Q6, Q12, Q14
3	Conn_01x02_Pin	Connector:JWT_A3963_1x02_P3.96mm_Vertical	J1, J2, J3
2	0	Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal	R41, R43
2	0	Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P15.24mm_Horizontal	R42, R44
2	150	Library:R_Axial_DIN0204_L3.6mm_D1.6mm_P2.54mm_Vertical	R33, R36
2	15u	Inductor_THT:L_Radial_D10.0mm_P5.00mm_Fastron_07M	L2, L3
2	200	Library:R_Axial_DIN0204_L3.6mm_D1.6mm_P2.54mm_Vertical	R34, R35
2	470	Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P15.24mm_Horizontal	R5, R6
2	6.7k	Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P15.24mm_Horizontal	R1, R2
2	6.7k	Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P2.54mm_Vertical	R23, R28
2	620	Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P2.54mm_Vertical	R24, R29
2	~	Package_DIP:DIP-14_W7.62mm	IC3, IC4
1	1.1n	Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm	C2
1	100	Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P15.24mm_Horizontal	R7
1	1000u	Capacitor_THT:CP_Radial_D8.0mm_P3.50mm	C16
1	100p	Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm	C3
1	100u	Inductor_THT:L_Toroid_Horizontal_D24.1mm_P23.10mm_Bourns_2200	L1
1	1N5822	Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal	D1
1	330	Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P15.24mm_Horizontal	R8
1	50k	Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P15.24mm_Horizontal	R9
1	5k	Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P15.24mm_Horizontal	R13

Questions

How big is the Classdamp PCB?

It measures 96.9 × 104.6 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Classdamp use?

103 parts, built around the SS14, IPD135N03LGATMA1, S8050 and S8550. 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 Classdamp KiCad files?

From the rysiu2007/Class-D-amplifier repository on GitHub, at the commit this page was made from: the board is classdamp/classdamp.kicad_pcb and its schematic classdamp/classdamp.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Classdamp design in my own project?

Its repository publishes it under the MIT 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/rysiu2007-class-d-amplifier" title="Classdamp 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/rysiu2007-class-d-amplifier.jpg" alt="Classdamp" width="1200" height="900">

A picture that opens the board, for a README

[![Classdamp](https://pcbkit.io/embed/boards/rysiu2007-class-d-amplifier.jpg?size=s)](https://pcbkit.io/boards/rysiu2007-class-d-amplifier)

Source

Repository: rysiu2007/Class-D-amplifier
Board file: classdamp/classdamp.kicad_pcb
Commit: 5ec2510
Licence: MIT

Similar boards

2 layers40.5 × 36.6 mm
XDuinoRails Hermes M
xDuinoRails/xDuinoRails_Hermes-M
Your DCC/Railcom signals and a +5V power source for your microcontroller on a breadboard
27 parts2CERN-OHL-W-2.0
2 layers
IEC-62056-21-Optical Probe
twam/IEC-62056-21-Optical-Probe
Optical-Probe for reading out power meters supporting IEC 62056-21 via USB
38 parts33
2 layers116.9 × 37.5 mm
Power Control Circuit
ambadran/spot-welder
Battery Spot Welder Circuit Using Capactive Discharge (CD) Circuit
41 parts2
2 layers140 × 27 mm
VFD IV 18
pondahai/VFD_IV_18
這是一個基於 ESP8266 微控制器，驅動 IV-18 型真空螢光顯示管的專案
42 parts2
6 layers30 × 20.1 mm
XDuinoRails Thor M
xDuinoRails/xDuinoRails_Thor
Make a Seeed XIAO board a mtc21 decoder, all the electronics needed is on this little board: - mtc21/plux16 compatible connector - DC Motor - 2x Functions - DCC / DCC-ACK / RailCom
46 parts1
2 layers90.7 × 55.4 mm
H bridge V3
ambadran/Revolute_Joint
Optimal Cheap Robotic Actuator allowing high Torque and moderate Speed. Allow PRECISE Absolute, Speed and Torque Control. Using 3D-printed Cycloidal Drive, Custom PCB and LQR Control Algorithm.
57 parts
2 layers99.1 × 99 mm
XDuinoRail Debug
chatelao/xDuinoRail-Decoder
The friendly decoder development plattform for model railroad tinkers.
170 partsAGPL-3.0
2 layers100 × 60 mm
Attiny1616board1
daisuke-ym/pinball

66 parts