2 layers21.3 × 68.7 mm
EnvOpenAudio
Envious-Data/EnvOpenAudio
An open source headphone/PC speaker project utilizing the RP2040, UDA1334A and TPA2016
63 partsGPL-3.0
2 layers22 × 40.6 mm
PCM2900C
Envious-Data/EnvOpenAudioAn open source headphone/PC speaker project utilizing the RP2040, UDA1334A and TPA2016
- Size
- 22 × 40.6 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 33
- Nets
- 37
- Pads
- 128
- Tracks, vias
- 101, 11
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 26 Jan 2022
- Updated
- 5 Apr 2025
Overview
PCM2900C is an open-source printed circuit board by Envious-Data, from the Envious-Data/EnvOpenAudio repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 22 × 40.6 mm with 33 parts on 37 nets, routed with 101 tracks and 11 vias.
It is built around the PAM8302AADCR, PCM2900CDB and PRTR5V0U2X. Its parts include 15 capacitors, 5 connectors, 4 resistors, 3 ICs and 1 diode. It belongs with the audio and music boards of this library.
Main components
3
PAM8302AADCR
SOP-8-40℃~+85℃ 0.3% 1-Channel 2.5Wx1@4Ω 2V~5.5V 4mA 50dB 80dB 85% Class D Filterless architecture SOP-8 Audio Amplifiers ROHSDiodes IncorporatedAudio Amplifiers
PCM2900CDB
SSOP-28-208mil-25℃~+85℃ 4.35V~5.25V 8kHz~48kHz Encoder/decoder USB SSOP-28-208mil Audio Interface ICs ROHSTexas InstrumentsAudio Interface ICs
PRTR5V0U2X
SOT-143-55℃~+125℃ 0.3pF、0.8pF 100W 10V、15V 5V 6.5V 6A 80nA ESD IEC 61000-4-2、IEC 61000-4-5、IEC 61000-4-4 Three channels Unidirectional SOT-143 ESD and Surge Protection (TVS/ESD) ROHSTECH PUBLICESD And Surge Protection (TVS/ESD)
README
README.mdEnvOpenAudio
An open source headphone/PC speaker project utilizing the RP2040, UDA1334A and TPA2016
Why
I like the idea of using the RP2040 for as many things as possible and since I made my own type-c version of the pico and my phone doesnt have a 3.5mm jack its a nice little bonus... I was also thinking I could use a Tiny2040 since its even smaller than a Pro Micro style board and also has all 4 Analogue GPIOs.
I will need help
Im not a programmer, the most I can do is scripting in bash and python, that said I need someone who can do C stuff, although there is an example for using the Rpi pico as a I2S USB Sound Card it doesnt fully function, it functions enough to use for a while but mute doesnt work and eventually USB will die off for some reason. https://github.com/raspberrypi/pico-playground/tree/master/apps/usb_sound_card
Contributions
Feel free to make a PR if you want to provide your own 3d modeled housings for 3d printable speakers housings or headphone cups, Ill obviously be modeling my own but its always nice to see how people approach things.
to do list (In no particular order)
- Make Functional Concept
- Firmware
- PC Speaker Housinds
- Headphone cups and band
- Custom smaller PCBs of I2S Decoder and amp.
-
Meow at wall for 3 hours
Currently working on (as of last updating this)
- 3d printed housing for speakers, small desktop style pc speakers
Parts
33| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 1µF | Capacitor_SMD:C_0402_1005Metric | C2, C4, C9, C10, C11, C12, C13, C14 |
| 5 | 10µF | Capacitor_SMD:C_0402_1005Metric | C1, C3, C6, C7, C8 |
| 2 | 22pF | Capacitor_SMD:C_0402_1005Metric | C15, C16 |
| 2 | 5.1K 0805 | Resistor_SMD:R_0402_1005Metric | R101, R102 |
| 2 | Conn_01x01 | TestPoint:TestPoint_Pad_1.0x1.0mm | J3, J4 |
| 2 | Conn_01x02 | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MPT-0,5-2-2.54_1x02_P2.54mm_Horizontal | J1, J2 |
| 2 | MountingHole | MountingHole:MountingHole_2.2mm_M2 | H1, H2 |
| 2 | PAM8302AAD | Package_SO:Diodes_SO-8EP | U1, U2 |
| 1 | 12MHz 18pF | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | 1M | Resistor_SMD:R_0402_1005Metric | R1 |
| 1 | 2R2 | Resistor_SMD:R_0402_1005Metric | R2 |
| 1 | G*** | kibuzzard-6354995E | kibuzzard-6354995E |
| 1 | PCM2900C | Package_SO:SSOP-28_5.3x10.2mm_P0.65mm | U101 |
| 1 | PRTR5V0U2X | Package_TO_SOT_SMD:SOT-143 | D1 |
| 1 | SolderJumper_2_Bridged | Jumper:SolderJumper-2_P1.3mm_Bridged_RoundedPad1.0x1.5mm | STAR2 |
| 1 | USB_C_Receptacle_USB2.0 | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J101 |
Questions
How big is the PCM2900C PCB?
It measures 22 × 40.6 mm and has 2 copper layers, 1.6 mm thick.
What parts does the PCM2900C use?
33 parts, built around the PAM8302AADCR, PCM2900CDB and PRTR5V0U2X. 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 PCM2900C KiCad files?
From the Envious-Data/EnvOpenAudio repository on GitHub, at the commit this page was made from: the board is KiCad/OLD FILES/USB-Sound-Card/PCM2900C.kicad_pcb and its schematic KiCad/EnvOpenAudio-RP2040/EnvOpenAudio.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the PCM2900C design in my own project?
Its repository publishes it under the GPL-3.0 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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