Stereo Audio Processing Board
About the Stereo Audio Processing Board
Stereo Audio Processing Board is an open source ESP32 PCB design by Paa-Kwasi-04, published on GitHub. It is a 2-layer board measuring 103 × 71.9 mm, with 89 components from 43 distinct parts.
Its main chip is the ESP32-WROOM-32, from the ESP32 family. Other key parts include the XL1509-5.0, CP2102N-AXX-XQFN24, NCP1117-3.3_TO252, LT1762-3.3 and MCP6002-XMC. By type, the board carries 34 capacitors, 22 resistors, 8 ICs, 6 diodes, 4 connectors and 2 transistors.
It belongs with the audio designs in this gallery.
Main components on the Stereo Audio Processing Board
Stereo Audio Processing Board bill of materials (BOM)
89 components, 43 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | XL1509-5.0 | SOIC-8_3.9x4.9mm_P1.27mm | U1 |
| 1 | CP2102N-AXX-XQFN24 CP2102N-Axx-xQFN24 | QFN-24-1EP_4x4mm_P0.5mm_EP2.6x2.6mm | U2 |
| 1 | NCP1117-3.3_TO252 | TO-252-2 | U3 |
| 1 | LT1762-3.3 | MSOP-8_3x3mm_P0.65mm | U4 |
| 1 | ESP32-WROOM-32 | ESP32-WROOM-32 | U5 |
| 2 | MCP6002-XMC MCP6002-xMC | DFN-8-1EP_3x2mm_P0.5mm_EP1.75x1.45mm | U6, U8 |
| 1 | ES8388 | QFN-28-1EP_4x4mm_P0.45mm_EP2.6x2.6mm | U7 |
| 2 | PMOS | SuperSOT-3 | Q1, Q2 |
| 2 | AUDIOJACK3 AudioJack3 | Jack_3.5mm_Ledino_KB3SPRS_Horizontal | J1, J2 |
| 1 | Barrel_Jack | BarrelJack_GCT_DCJ200-10-A_Horizontal | J3 |
| 1 | USB_C_PLUG_USB2.0 USB_C_Plug_USB2.0 | USB_C_Receptacle_GCT_USB4085 | P1 |
| 1 | Fuse | Fuse_0603_1608Metric | F1 |
| 1 | TestPoint_3V3A | TestPoint_Plated_Hole_D2.0mm | TP_3V3A1 |
| 1 | TestPoint_3V3D | TestPoint_Plated_Hole_D2.0mm | TP_3V3D1 |
| 1 | TestPoint_5V | TestPoint_Plated_Hole_D2.0mm | TP_5V1 |
| 1 | TestPoint_5VBarrel | TestPoint_Plated_Hole_D2.0mm | TP_5VBarrel1 |
| 1 | TestPoint_5VUSB | TestPoint_Plated_Hole_D2.0mm | TP_5VUSB1 |
| 1 | TestPoint_12V | TestPoint_Plated_Hole_D2.0mm | TP_12V1 |
| 1 | TestPoint_GND | TestPoint_Plated_Hole_D2.0mm | TP_GND1 |
| 1 | TestPoint_RX | TestPoint_Plated_Hole_D2.0mm | TP_RX1 |
Show 23 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TestPoint_SCL | TestPoint_Plated_Hole_D2.0mm | TP_SCL1 |
| 1 | TestPoint_SDA | TestPoint_Plated_Hole_D2.0mm | TP_SDA1 |
| 1 | TestPoint_TX | TestPoint_Plated_Hole_D2.0mm | TP_TX1 |
| 1 | D_Schottky | D_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D1 |
| 1 | 1N5819WS | D_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D2 |
| 2 | LED | LED_0201_0603Metric | D3, D4 |
| 2 | ESD5ZXX ESD5Zxx | D_SOD-523 | D5, D6 |
| 1 | 68UH 68uH | L_0201_0603Metric | L1 |
| 14 | 10UF 10uF | CP_EIA-1608-10_AVX-L | C1, C2, C7, C14, C15, C16, C17, C18 +6 |
| 3 | 470UF 470uF | CP_EIA-1608-10_AVX-L | C3, C28, C29 |
| 1 | 180UF 180uF | CP_EIA-1608-10_AVX-L | C4 |
| 1 | 105F | CP_EIA-1608-10_AVX-L | C5 |
| 2 | 1UF 1uF | CP_EIA-1608-10_AVX-L | C6, C8 |
| 1 | 0.01UF 0.01uF | CP_EIA-1608-10_AVX-L | C9 |
| 3 | 0.1µF | CP_EIA-1608-10_AVX-L | C10, C11, C13 |
| 1 | 100NF 100nF | CP_EIA-1608-10_AVX-L | C12 |
| 8 | 0.1UF 0.1uF | CP_EIA-1608-10_AVX-L | C19, C22, C25, C27, C31, C32, C33, C34 |
| 3 | 5.1KΩ | R_0201_0603Metric | R1, R2, R6 |
| 4 | 100KΩ | R_0201_0603Metric | R3, R4, R15, R16 |
| 2 | 330Ω | R_0201_0603Metric | R5, R10 |
| 9 | 10KΩ | R_0201_0603Metric | R7, R8, R9, R11, R12, R13, R14, R19 +1 |
| 2 | 1MΩ | R_0201_0603Metric | R17, R18 |
| 2 | 33Ω | R_0201_0603Metric | R21, R22 |
Stereo Audio Processing Board design files
The KiCad project lives in the Paa-Kwasi-04/Kicad_Projects repository on GitHub; these links point at the commit this page was built from.
Stereo Audio Processing Board: common questions
What microcontroller does the Stereo Audio Processing Board use?
The Stereo Audio Processing Board is built around the ESP32-WROOM-32, from the ESP32 family.
How big is the Stereo Audio Processing Board?
The Stereo Audio Processing Board measures 103 × 71.9 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Stereo Audio Processing Board?
89 components, from 43 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 Stereo Audio Processing Board design files?
From the Paa-Kwasi-04/Kicad_Projects 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 Stereo Audio Processing Board design in my own project?
The repository has no license, so all rights stay with Paa-Kwasi-04. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Stereo Audio Processing Board 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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