4 layers80 × 85 mm
Mainboard v13
DVA490-474-Project-Course/SSL-Hardware-Development
Contains all hardware related material. (No software).
118 partsMIT
4 layers55 × 20 mm
Substrate PocketMusic3
SubstrateElectronics/SoundStick1An eraser sized music player/walkie-talkie supporting Bluetooth and SD card playback.
- Size
- 55 × 20 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 66
- Nets
- 76
- Pads
- 272
- Tracks, vias
- 341, 123
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 27 Oct 2026
- Updated
- 28 Oct 2026
Overview
Substrate PocketMusic3 is an open-source printed circuit board by SubstrateElectronics, from the SubstrateElectronics/SoundStick repository on GitHub, published under the CERN-OHL-W-2.0 licence. It is a 4-layer board of 55 × 20 mm with 66 parts on 76 nets, routed with 341 tracks and 123 vias.
It is built around the NRF52840-QFAA-R and MP34DT05. Its parts include 31 capacitors, 10 connectors, 9 resistors, 5 switches and 4 ICs. It belongs with the nRF52 and nRF5x boards of this library.
Main components
2
NRF52840-QFAA-R
QFN-48(6x6)-95dBm 1.7V~5.5V 2.4GHz 2.4GHz~2.4835GHz 2Mbps 4.82mA 6.26mA 8dBm Bluetooth、802.15.4 SPI、USB、UART、ADC、I2S、PDM、PWM Supports RSSI function、CRC check function、DMA function QFN-48(6x6) RF Transceiver ICs ROHSNordic SemiconRF Transceiver ICsMP34DT05
--40℃~+85℃ 1.8V 1mm 3mm 4mm 64dB 650uA Omnidirectional - MEMS Microphones ROHSSTMicroelectronicsMEMS Microphones
README
README.mdSoundStick
An eraser sized music player/walkie-talkie supporting Bluetooth and SD card playback.
[!NOTE]
License
The Hardware Design Files (
.kicad_sch,.kicad_pcb, schematics, gerbers): are Licensed under the CERN Open Hardware Licence v2 (Weakly Reciprocal) - CERN-OHL-W. You are free to use, study, and privately modify the hardware. However, if you publicly distribute or mass-produce modified versions of these board designs, you must open-source your modified hardware design files under the same license terms. See the LICENSE file for details.
[!WARNING] Use at your own risk. Hasn't been tested yet.
Components
- nRF52840 QFN48 Variant
- MCP73831 Li-ion Charger
- XC6206 3.3v LDO
- MAX98357A I2C AMP
- MP34DT05 MEMS Microphone
- DM3AT MicroSD Slot
- USB-C 6P
Features
- SD Card & Bluetooth audio playback
- 4 configurable buttons
- Onboard Li-ion battery charger
- Low Power Consumption
- SSD1306 OLED display support
Parts
66| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 0.1uF | Capacitor_SMD:C_0402_1005Metric | C11, C12, C13, C14, C15, C16, C21, C30 |
| 7 | 10uF | Capacitor_SMD:C_0603_1608Metric | C1, C2, C3, C4, C9, C10, C28 |
| 6 | Conn_01x01_Pin | TestPoint:TestPoint_Pad_D3.0mm | J4, J5, J6, J7, J8, J9 |
| 5 | 2.2uF | Capacitor_SMD:C_0402_1005Metric | C23, C24, C25, C26, C27 |
| 4 | SW_Push | button:SW-SMD_HX-3X6X3.5-CA-0.6-2.5N | SW1, SW2, SW3, SW4 |
| 2 | 0.5pF | Capacitor_SMD:C_0402_1005Metric | C8, C31 |
| 2 | 12pF | Capacitor_SMD:C_0603_1608Metric | C5, C6 |
| 2 | 4.7k | Resistor_SMD:R_0402_1005Metric | R5, R6 |
| 2 | 5.1k | Resistor_SMD:R_0402_1005Metric | R1, R2 |
| 2 | 6pF | Capacitor_SMD:C_0603_1608Metric | C17, C18 |
| 2 | LOGO | LOGO | G***, G*** |
| 1 | 0.1uF | Capacitor_SMD:C_0603_1608Metric | C19 |
| 1 | 0.8pF | Capacitor_SMD:C_0402_1005Metric | C7 |
| 1 | 100k | Resistor_SMD:R_0402_1005Metric | R7 |
| 1 | 100pF | Capacitor_SMD:C_0402_1005Metric | C20 |
| 1 | 10k | Resistor_SMD:R_0402_1005Metric | R9 |
| 1 | 10k | Resistor_SMD:R_0603_1608Metric | R3 |
| 1 | 1k | Resistor_SMD:R_0402_1005Metric | R4 |
| 1 | 1uF | Capacitor_SMD:C_0603_1608Metric | C22 |
| 1 | 1uF | Capacitor_SMD:C_0402_1005Metric | C29 |
| 1 | 32.768KHz | Crystal:Crystal_SMD_3215-2Pin_3.2x1.5mm | Y2 |
| 1 | 32MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | 4.7nH | Inductor_SMD:L_0402_1005Metric | L1 |
| 1 | 620k | Resistor_SMD:R_0603_1608Metric | R8 |
| 1 | Conn_01x30_Pin | Display:30P_0.7mm | J10 |
| 1 | Conn_Coaxial_Small | Connector_Coaxial:U.FL_Hirose_U.FL-R-SMT-1_Vertical | J1 |
| 1 | LED_Small | LED_SMD:LED_0603_1608Metric | D1 |
| 1 | MAX98357A | Package_DFN_QFN:TQFN-16-1EP_3x3mm_P0.5mm_EP1.23x1.23mm | U4 |
| 1 | MCP73831-2-OT | Package_TO_SOT_SMD:SOT-23-5 | U2 |
| 1 | MP34DT05 | MP34DT05:MP34DT05 | MK1 |
| 1 | Micro_SD_Card_Det_Hirose_DM3AT | Connector_Card:microSD_HC_Hirose_DM3AT-SF-PEJM5 | J3 |
| 1 | NRF52840-QFAA-R | NRF52840-QFAA:QFN-48_L6.0-W6.0-P0.40-TL-EP4.6 | U1 |
| 1 | SW_SPDT | Button_Switch_SMD:SW_SPDT_Shouhan_MSK12C02 | SW8 |
| 1 | USB_C_Receptacle_PowerOnly_6P | Connector_USB:USB_C_Receptacle_GCT_USB4125-xx-x_6P_TopMnt_Horizontal | J2 |
| 1 | XC6206P332MR_C347376 | Package_TO_SOT_SMD:SOT-23-3 | U3 |
Questions
How big is the Substrate PocketMusic3 PCB?
It measures 55 × 20 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Substrate PocketMusic3 use?
66 parts, built around the NRF52840-QFAA-R and MP34DT05. 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 Substrate PocketMusic3 KiCad files?
From the SubstrateElectronics/SoundStick repository on GitHub, at the commit this page was made from: the board is Substrate PocketMusic3.kicad_pcb and its schematic Substrate PocketMusic3.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Substrate PocketMusic3 design in my own project?
Its repository publishes it under the CERN-OHL-W-2.0 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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