Audio mixer
About the Audio mixer PCB
Audio mixer is an open source ESP32 PCB design by 21bsirota, published on GitHub. It is a 4-layer board measuring 173.5 × 187.5 mm, with 788 components from 145 distinct parts.
Its main chip is the XIAO-ESP32-S3-DIP, from the ESP32 family. Other key parts include the Cmod A7-35T, TPS7A2033PDBVR, TPS563209DDCR, TLV62569ADRLT and LM5155DSSR. By type, the board carries 312 capacitors, 235 resistors, 85 diodes, 71 test points, 37 connectors and 29 ICs.
It belongs with the audio designs in this gallery.
Main components on the Audio mixer
XIAO-ESP32-S3-DIPCmod A7-35TTPS7A2033PDBVRTPS563209DDCRTLV62569ADRLTLM5155DSSRADP5070AREZTPS7A4901DGNRTPS7A3001DGNRTLV320ADC3140IRTWRTAD5212IRGER1606Q16-UMCP23017-E/SOMIC2981/82YWM-TR
Audio mixer bill of materials (BOM)
788 components, 145 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | XIAO-ESP32-S3-DIP | XIAO-ESP32-S3-DIP | U1 |
| 1 | Cmod A7-35T | Cmod-A7 | U2 |
| 1 | TPS7A2033PDBVR | DBV0005A-IPC_A | U3 |
| 1 | TPS563209DDCR | DDC0006A | U4 |
| 1 | TLV62569ADRLT | DRL0006A | U5 |
| 1 | LM5155DSSR | DSS0012B | U6 |
| 1 | ADP5070AREZ | ETSSOP-20-1EP_4.4x6.5mm_P0.65mm_EP3x4.2mm | U7 |
| 1 | TPS7A4901DGNR | DGN8_1P89X1P57 | U8 |
| 1 | TPS7A3001DGNR | DGN8_1P89X1P57 | U9 |
| 8 | TLV320ADC3140IRTWR | TLV320ADC3140IRTWR_TEX | U10, U11, U12, U13, U14, U15, U16, U17 |
| 2 | TAD5212IRGER | TAD5212IRGER | U18, U19 |
| 4 | 1606Q16-U | SOP64P600X175-16N | U20, U21, U22, U23 |
| 2 | MCP23017-E/SO | SOIC28-W_MC_MCH | U24, U27 |
| 4 | MIC2981/82YWM-TR MIC2981_82YWM-TR | SOIC127P1031X262-18N | U25, U26, U28, U29 |
| 1 | CSD19537Q3 | VSON-8_3.3x3.3mm_P0.65mm_NexFET | Q1 |
| 1 | 24.576M | NZ2520SDA | Y1 |
| 36 | B3B-XH-AMLFSN | CONN_B3B-XH-AMLFSN_JST | J1, J2, J3, J4, J5, J6, J7, J8 +28 |
| 1 | XT60 | AMASS_XT60-M_1x02_P7.20mm_Vertical | J33 |
| 1 | GND | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP1 |
| 1 | 5V | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP2 |
Show 125 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 3.3VD | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP3 |
| 1 | 3.3VA | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP4 |
| 1 | 48V | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP5 |
| 1 | +15V | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP6 |
| 1 | -15V | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP7 |
| 1 | D1 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP8 |
| 1 | D2 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP9 |
| 1 | D3 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP10 |
| 1 | D4 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP11 |
| 1 | D5 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP12 |
| 1 | D6 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP13 |
| 1 | D7 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP14 |
| 1 | D8 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP15 |
| 1 | D9 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP16 |
| 1 | D10 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP17 |
| 1 | D11 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP18 |
| 1 | D12 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP19 |
| 1 | D13 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP20 |
| 1 | D14 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP21 |
| 1 | A15 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP22 |
| 1 | A16 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP23 |
| 1 | D17 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP24 |
| 1 | D18 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP25 |
| 1 | D19 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP26 |
| 1 | D20 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP27 |
| 1 | D21 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP28 |
| 1 | D22 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP29 |
| 1 | D23 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP30 |
| 1 | RST_N | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP31 |
| 1 | FPGA_CS | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP32 |
| 1 | I2C1_SDA | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP33 |
| 1 | I2C1_SCL | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP34 |
| 1 | I2C0_SDA | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP35 |
| 1 | I2C0_SCL | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP36 |
| 1 | TX | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP37 |
| 1 | D48 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP38 |
| 1 | D47 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP39 |
| 1 | D46 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP40 |
| 1 | D45 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP41 |
| 1 | D44 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP42 |
| 1 | D43 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP43 |
| 1 | D42 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP44 |
| 1 | D41 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP45 |
| 1 | D40 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP46 |
| 1 | D39 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP47 |
| 1 | D38 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP48 |
| 1 | D37 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP49 |
| 1 | D36 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP50 |
| 1 | D35 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP51 |
| 1 | D34 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP52 |
| 1 | D33 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP53 |
| 1 | D32 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP54 |
| 1 | D31 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP55 |
| 1 | D30 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP56 |
| 1 | D29 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP57 |
| 1 | D28 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP58 |
| 1 | D27 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP59 |
| 1 | D26 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP60 |
| 1 | 3V3 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP61 |
| 1 | MOSI | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP62 |
| 1 | MISO | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP63 |
| 1 | SCK | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP64 |
| 1 | RX | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP65 |
| 1 | GPO1_0 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP66 |
| 1 | GPIO1_0 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP67 |
| 1 | GPIO2_0 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP68 |
| 1 | GPO1_1 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP69 |
| 1 | GPIO1_1 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP70 |
| 1 | GPIO2_1 | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP71 |
| 2 | SS34 | DIOM7959X265N | D1, D2 |
| 1 | SS2PH10 | DO-220AA_SS2PH10-M3&slash_84A_VIS | D3 |
| 2 | B0540W | SOD123_DIO-M | D4, D5 |
| 16 | 1N4004 | D_DO-41_SOD81_P10.16mm_Horizontal | D6, D7, D8, D9, D10, D11, D12, D13 +8 |
| 64 | BAT54S | SOT-23 | D22, D23, D24, D25, D26, D27, D28, D29 +56 |
| 11 | FerriteBead_Small | L_1206_3216Metric_Pad1.22x1.90mm_HandSolder | FB1, FB2, FB3, FB4, FB5, FB6, FB7, FB8 +3 |
| 2 | 15u | L_1206_3216Metric_Pad1.22x1.90mm_HandSolder | L1, L5 |
| 2 | 3.3u | L_1206_3216Metric_Pad1.22x1.90mm_HandSolder | L2, L4 |
| 1 | 1u | L_1206_3216Metric_Pad1.22x1.90mm_HandSolder | L3 |
| 1 | 47u | L_1206_3216Metric_Pad1.22x1.90mm_HandSolder | L6 |
| 36 | 0.1u | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C1, C4, C41, C42, C49, C52, C57, C59 +28 |
| 77 | 10u | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C2, C3, C5, C6, C9, C11, C13, C14 +69 |
| 4 | 4.7u | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C7, C30, C33, C34 |
| 1 | 68n | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C8 |
| 14 | 100n | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C10, C20, C197, C198, C199, C202, C203, C204 +6 |
| 2 | 49.755n | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C12, C26 |
| 1 | 470p | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C15 |
| 1 | 12p | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C16 |
| 14 | 1u | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C17, C18, C19, C28, C29, C35, C54, C71 +6 |
| 1 | 6.8n | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C21 |
| 1 | 47p | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C23 |
| 3 | 22u | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C24, C25, C27 |
| 2 | 10n | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C31, C32 |
| 65 | 47u 63V | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C40, C217, C218, C219, C220, C221, C222, C223 +57 |
| 64 | 2.2n | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C43, C44, C45, C46, C47, C50, C53, C55 +56 |
| 6 | 0.1u 16V | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C179, C180, C186, C188, C189, C195 |
| 6 | 10u 16V | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C181, C182, C187, C190, C191, C196 |
| 2 | 1u 16V | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C183, C192 |
| 4 | 4.7n | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C184, C185, C193, C194 |
| 8 | 100p | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C200, C201, C205, C206, C210, C211, C215, C216 |
| 5 | 4.7k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R1, R2, R3, R4, R8 |
| 1 | 22 | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R5 |
| 3 | 10k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R6, R16, R30 |
| 1 | 0 | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R7 |
| 1 | 48.7k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R9 |
| 1 | 2.2k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R10 |
| 1 | 22.1k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R11 |
| 1 | 8.25k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R12 |
| 1 | 453k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R13 |
| 65 | 100k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R14, R60, R61, R62, R63, R64, R65, R66 +57 |
| 1 | 56.2k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R15 |
| 2 | 88.7k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R17, R18 |
| 1 | 11.3k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R19 |
| 9 | 1k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R20, R32, R33, R34, R35, R36, R37, R38 +1 |
| 1 | 100 | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R21 |
| 1 | 10m | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R22 |
| 1 | 3.92k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R23 |
| 1 | 2.8k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R24 |
| 2 | 120k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R25, R28 |
| 1 | 2.49k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R26 |
| 1 | 1.4M | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R27 |
| 1 | 118k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R29 |
| 1 | 61.9k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R31 |
| 4 | 1M | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R40, R41, R42, R43 |
| 64 | 6.8k 0.1% | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R44, R45, R46, R47, R48, R49, R50, R51 +56 |
| 64 | 220 | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R76, R77, R78, R79, R80, R81, R82, R83 +56 |
Audio mixer design files
The KiCad project lives in the 21bsirota/audio_mixer repository on GitHub; these links point at the commit this page was built from.
Audio mixer: common questions
What microcontroller does the Audio mixer use?
The Audio mixer is built around the XIAO-ESP32-S3-DIP, from the ESP32 family.
How big is the Audio mixer PCB?
The Audio mixer measures 173.5 × 187.5 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Audio mixer?
788 components, from 145 distinct parts. The full bill of materials is listed on this page.
Where can I download the Audio mixer design files?
From the 21bsirota/audio_mixer repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Audio mixer design in my own project?
The repository has no license, so all rights stay with 21bsirota. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Audio mixer 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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