2 layers137.5 × 51 mm
2 layers33.3 × 34.2 mm
Note
the-X-alien/NoteAn open source speaker for all your music needs. Completed with bluetooth compatibility, this speaker is a great deal at just manufacturing price. Have the fun and get the brag rights of building your own speaker and get to keep a sweet final product.
- Size
- 33.3 × 34.2 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 9
- Nets
- 46
- Pads
- 91
- Tracks, vias
- 89, 9
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 21 Jun 2025
- Updated
- 7 Jul 2025
Overview
Note is an open-source printed circuit board by the-X-alien, from the the-X-alien/Note repository on GitHub, published under the CC0-1.0 licence. It is a 2-layer board of 33.3 × 34.2 mm with 9 parts on 46 nets, routed with 89 tracks and 9 vias.
It is built around the ESP32-WROOM-32, MT3608 and PAM8403, with the LD1117V33 among its other parts. Its parts include 5 ICs and 1 connector. It belongs with the audio and music and power boards and the ESP32 boards of this library.
Main components
4
ESP32-WROOM-32
SMD,18x25.5mm-40℃~+85℃ -98dBm 2.4GHz 2.7V~3.6V 20dBm Bluetooth4.2 ESP32-DOWDQ6 UART、SDIO、SPI、I2C、GPIO、PWM、ADC、DAC SMD,25.5x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
MT3608
SOT-23-6-40℃~+85℃ 1 1.2MHz 100uA、1.6mA 2A 2V~24V Adjustable Boost Boost Built-in No SOT-23-6 DC-DC Converters ROHS西安航天民芯DC-DC Converters
PAM8403
SOP-16-40℃~+85℃ 2-Channel 2.2V~5.5V 3Wx2@4Ω 6.3mA 90% Automatic mute/no-noise switch、Enable/shutdown function、Filterless architecture Class D SOP-16 Audio Amplifiers ROHSSlkorAudio Amplifiers
LD1117V33
TO-2200℃~+125℃@(Tj) 1 1.2V@(800mA) 100uV 15V 3.3V 5mA 75dB@(120Hz) 800mA Fixed Over Current Protection、Thermal Shutdown Positive TO-220 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSSTMicroelectronicsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
README
README.mdNote
An open source speaker for all your music needs. Completed with dual speakers and bluetooth compatibility, this speaker is a great deal at just manufacturing price. Have the fun and get the brag rights of building your own speaker and get to keep a sweet final product. I made this project because I saw a picture of a speaker on the starter projects section but there was no guide on how to make a speaker, so I decided I make one myself.
My Assembled Project
My PCB
BOM:
| Quantity | Designation and Description | Price |
|---|---|---|
| 1 | LD1117V33 (3.3V voltage regulator) | $6.53 |
| 1 | 2 40 mm Speaker | $7.86 |
| 1 | TP4056 (Charger for receiving power and sending it to the battery) | $6.00 |
| 1 | ESP32-WROOM-32 | $14.00 |
| 1 | Connector for 3.7v battery | $6.00 |
| 1 | 3.7v Battery | $9.00 |
| 1 | PAM8403 (Audio Amplifier) | $6.00 |
| 1 | MT3608 (Boost Converter to 5V) | $6.00 |
| 1 | Copper wire for speakers and bad footprints | $8.00 |
| 1 | PCB | $25.00 |
| Total: | ~$94.39+ Tax = 103.24 |
Parts
9| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | Speaker | Speaker:SPKR | LS1, LS2 |
| 1 | Conn_01x02 | JSTC:JST_PH_B2B-PH-K_02x2.00mm_Straight | J1 |
| 1 | ESP32-WROOM-32 | RF_Module:ESP32-WROOM-32 | U6 |
| 1 | LD1117V33 | Package_TO_SOT_THT:TO-220-3_Vertical | U5 |
| 1 | LOGO | IMGS:notes | G*** |
| 1 | MT3608 | BOST:MT3608_module_SMT | U2 |
| 1 | pam8403 | PAM:pam8403 | U4 |
| 1 | ~ | CHRG:TP4056-18650 | U3 |
Questions
How big is the Note PCB?
It measures 33.3 × 34.2 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Note use?
9 parts, built around the ESP32-WROOM-32, MT3608, PAM8403 and LD1117V33. 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 Note KiCad files?
From the the-X-alien/Note repository on GitHub, at the commit this page was made from: the board is PCB/Note.kicad_pcb and its schematic PCB/Note.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Note design in my own project?
Its repository publishes it under the CC0-1.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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