4 layers100 × 77.4 mm
4 layers124.6 × 101 mm
Microphone board
Epicotch/Acoustic-Cameraacoustic camera:tm:
- Size
- 124.6 × 101 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 212
- Nets
- 292
- Pads
- 1,079
- Tracks, vias
- 1,357, 1,769
- Pours
- 13
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 4 Jun 2026
- Updated
- 23 Jul 2026
Overview
Microphone board is an open-source printed circuit board by Epicotch, from the Epicotch/Acoustic-Camera repository on GitHub, published under the MIT licence. It is a 4-layer board of 124.6 × 101 mm with 212 parts on 292 nets, routed with 1,357 tracks and 1,769 vias.
It is built around the STM32H747XIH6, AP63203WU and TPS63001DRC, with the TF-01A, 24LC256-I/P and TPD6F003DQD among its other parts. Its parts include 90 capacitors, 68 resistors, 11 ICs, 7 connectors and 6 diodes. It belongs with the audio and music boards and the STM32 boards of this library.
Main components
12
STM32H747XIH6
TFBGA-265(14x14)-40℃~+85℃ 1.62V~3.6V 168 1MB 240MHz、480MHz 2MB 32 Bit ARM Cortex-M4、ARM Cortex-M7 Built-in FLASH TFBGA-265(14x14) Microcontrollers (MCU/MPU/SOC) ROHSSTMicroelectronicsMicrocontrollers (MCU/MPU/SOC)
AP63203WU
TSOT-23-6-40℃~+85℃@(TA) 1 1.1MHz 22uA 2A 3.3V 3.8V~32V Buck Built-in Fixed Overcurrent Protection、Light load efficient mode、Cycle-by-cycle current limiting、Hiccup current limiting、EMI optimization (spread spectrum) Step-down type Yes TSOT-23-6 DC-DC Converters ROHSDiodes IncorporatedDC-DC Converters
TPS63001DRC
VSON-10-EP(3x3)-40℃~+85℃@(TA) 1 1.5MHz 1.8V~5.5V 3.3V 50uA Buck-Boost Buck-Boost Built-in Fixed Yes VSON-10-EP(3x3) DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
TF-01A
SMD1.85mm Connector and Ejector MicroSD Card (TF Card) Push-Push With Locating Pins SMD SD Card / Memory Card Connector ROHSHRO ElectronicsSD Card / Memory Card Connector
24LC256-I/P
PDIP-8-40℃~+85℃ 1,000,000 cycles 2.5V~5.5V 200 Years 256Kbit 400kHz 5ms Hardware write protection function、Noise suppression function I2C PDIP-8 EEPROM ROHSMicrochip TechnologyEEPROM
TPD6F003DQD
WSON-12-EP(1.4x2.5)-40℃~+85℃ 100Ω 2 200MHz 25dB@1GHz 6 8.5pF Yes WSON-12-EP(1.4x2.5) EMI/RFI Filters (LC, RC Networks) ROHSTexas InstrumentsEMI/RFI Filters (LC, RC Networks)
TPS2116DRL
SOT-583Operating status indication SOT-583 Power Management - Specialized ROHSTexas InstrumentsPower Distribution Switches
TPS7A2033PDBV
SOT-23-5-40℃~+125℃@(Tj) 1 10uVrms 140mV@(300mA) 3.3V 300mA 65dB@(100kHz) 6V 8.5uA Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown、Enable control、Input under-voltage protection、Output discharge、Built-in soft-start Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTexas InstrumentsVoltage Regulators - Linear, Low Drop Out (LDO) RegulatorsUSBLC6-2SC6
SOT-23-60.35pF、0.8pF 100nA 150W@8/20us 15V 2 5V 6A@8/20us 6V ESD SOT-23-6 ESD and Surge Protection (TVS/ESD) ROHSUMWESD And Surge Protection (TVS/ESD)MSM261DDB019
LGA-5(2.7x3.5)-26dB 0.98mm 1.8V 2.65mm 3.5mm 66dB 750uA Omnidirectional Omnidirectional pickup LGA-5(2.7x3.5) MEMS Microphones ROHSMEMSMEMS Microphones
GNR4018S2R2MT
SMD,4x4mm1.65A 2.2uH 2.7A 55mΩ Magnetic Shielded Inductor ±20% SMD,4x4mm Power Inductors ROHSFAUKUPower Inductors
AO3401A
SOT-231 P-Channel 14nC@10V 30V 47mΩ@10V、60mΩ@4.5V、85mΩ@2.5V 4A 55pF 645pF 80pF 900mV SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETs
README
README.mdhi
Firmware is under firmware, actual board is under Microphone board (KiCAD 10), analysis tools is are in pattern analysis, power viewing utility is under power viewer
Parts
212| Qty | Value | Footprint | References |
|---|---|---|---|
| 32 | 100n | Capacitor_SMD:C_0402_1005Metric | C39, C40, C41, C42, C43, C44, C45, C46, C47, C48, C49, C50, C51, C52, C53, C54 +16 |
| 29 | 100n | Capacitor_SMD:C_0201_0603Metric | C10, C11, C12, C13, C14, C16, C17, C18, C19, C20, C21, C22, C23, C24, C25, C26 +13 |
| 29 | 22R | Resistor_SMD:R_0402_1005Metric | R10, R11, R12, R13, R14, R15, R16, R17, R18, R19, R20, R21, R22, R23, R24, R25 +13 |
| 20 | 10k | Resistor_SMD:R_0402_1005Metric | R1, R4, R33, R34, R36, R40, R41, R42, R43, R44, R45, R46, R47, R51, R61, R62 +4 |
| 16 | MSM261DDB019 | Mic_Parts:MSM261DDB019 | M1, M2, M3, M4, M5, M6, M7, M8, M9, M10, M11, M12, M13, M14, M15, M16 |
| 6 | 470R | Resistor_SMD:R_0402_1005Metric | R53, R54, R55, R68, R69, R70 |
| 5 | 2.2u | Capacitor_SMD:C_0402_1005Metric | C57, C58, C61, C62, C77 |
| 5 | 2.2u | Capacitor_SMD:C_0603_1608Metric | C2, C3, C5, C84, C85 |
| 5 | 4.7u | Capacitor_SMD:C_0603_1608Metric | C4, C37, C69, C71, C74 |
| 4 | 1u | Capacitor_SMD:C_0603_1608Metric | C15, C38, C86, C87 |
| 4 | M3 mounting hole | MountingHole:MountingHole_3.2mm_M3_DIN965_Pad | H1, H2, H3, H4 |
| 4 | Red | PCM_JLCPCB:D_0603 | D3, D4, D5, D6 |
| 3 | 10u 6.3V | Capacitor_SMD:C_0805_2012Metric | C75, C78, C79 |
| 2 | 10u | Capacitor_SMD:C_0805_2012Metric | C6, C7 |
| 2 | 1k | Resistor_SMD:R_0402_1005Metric | R35, R60 |
| 2 | 22u | Capacitor_SMD:C_0805_2012Metric | C82, C83 |
| 2 | 2k2 | Resistor_SMD:R_0402_1005Metric | R2, R3 |
| 2 | 5k1 | Resistor_SMD:R_0402_1005Metric | R56, R57 |
| 2 | GNR4018S2R2MT | Inductor_SMD:L_Abracon_ASPI-4030S | L1, L2 |
| 2 | TLV320ADC5140IRTWT | Mic_Parts:RTW24_4P15X4P15_TEX | U3, U4 |
| 2 | Tactile Button, 160gf | PCM_JLCPCB:SW_TS-1088-AR02016 | S1, S2 |
| 1 | 100R | Resistor_SMD:R_0402_1005Metric | R50 |
| 1 | 100k | Resistor_SMD:R_0402_1005Metric | R49 |
| 1 | 10R | Resistor_SMD:R_0402_1005Metric | R38 |
| 1 | 10k | Connector_JST:JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | TH1 |
| 1 | 10u | Capacitor_SMD:C_0603_1608Metric | C80 |
| 1 | 15k | Resistor_SMD:R_0402_1005Metric | R52 |
| 1 | 220pF | Capacitor_SMD:C_0402_1005Metric | C1 |
| 1 | 240k | Resistor_SMD:R_0402_1005Metric | R48 |
| 1 | 24LC256 | PCM_JLCPCB:SOIC-8_3.9x4.9mm_P1.27mm | U2 |
| 1 | 2R | Resistor_SMD:R_0603_1608Metric | R39 |
| 1 | 3.7V 18650 | Connector_Wire:SolderWire-1.5sqmm_1x02_P6mm_D1.7mm_OD3mm | BT1 |
| 1 | 4k7 | Resistor_SMD:R_0402_1005Metric | R37 |
| 1 | AO3401A | PCM_Package_TO_SOT_SMD_AKL:SOT-23 | Q2 |
| 1 | AP63203WU | Package_TO_SOT_SMD:TSOT-23-6 | U8 |
| 1 | Conn_ARM_JTAG_SWD_10 | Connector_PinHeader_1.27mm:PinHeader_2x05_P1.27mm_Vertical_SMD | J7 |
| 1 | FNR5040S4R7MT | Inductor_SMD:L_Changjiang_FNR5040S | L3 |
| 1 | Green | PCM_JLCPCB:D_0603 | D1 |
| 1 | MCP73833-xxx-MF | Package_DFN_QFN:DFN-10-1EP_3x3mm_P0.5mm_EP1.58x2.35mm | U9 |
| 1 | MMBT3904 | PCM_Package_TO_SOT_SMD_AKL:SOT-23 | Q1 |
| 1 | Menu | Connector_JST:JST_PH_B6B-PH-K_1x06_P2.00mm_Vertical | J6 |
| 1 | NHD-2.4-240320AF-CSXP | Connector_FFC-FPC:Hirose_FH12-40S-0.5SH_1x40-1MP_P0.50mm_Horizontal | J1 |
| 1 | OV2640 | Mic_Parts:OV2640 | C90 |
| 1 | OV2640 | Connector_FFC-FPC:Hirose_FH12-24S-0.5SH_1x24-1MP_P0.50mm_Horizontal | J2 |
| 1 | STM32H747XIH6 | Package_BGA:TFBGA-265_14x14mm_Layout17x17_P0.8mm | U1 |
| 1 | SX2M25.000M20F30TNN | Oscillator:Oscillator_SMD_Kyocera_KC2520Z-4Pin_2.5x2.0mm | Y1 |
| 1 | TF-01A | Mic_Parts:TF-01A | J3 |
| 1 | TPD6F003 | Package_SON:Texas_R-PWSON-N12_EP0.4x2mm | U5 |
| 1 | TPS2116DRL | Package_TO_SOT_SMD:SOT-583-8 | U7 |
| 1 | TPS63001 | Package_SON:Texas_DRC0010J_ThermalVias | U6 |
| 1 | TPS7A2033PDBV | Package_TO_SOT_SMD:SOT-23-5 | U10 |
| 1 | TYPE-C 16PIN 2MD(073) | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J4 |
| 1 | Trigger | Connector_JST:JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | J5 |
| 1 | USBLC6-2SC6 | Package_TO_SOT_SMD:SOT-23-6 | U11 |
| 1 | Yellow | PCM_JLCPCB:D_0603 | D2 |
Questions
How big is the Microphone board PCB?
It measures 124.6 × 101 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Microphone board use?
212 parts, built around the STM32H747XIH6, AP63203WU, TPS63001DRC and TF-01A. 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 Microphone board KiCad files?
From the Epicotch/Acoustic-Camera repository on GitHub, at the commit this page was made from: the board is Microphone board/Microphone board.kicad_pcb and its schematic Microphone board/EEPROM.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Microphone board design in my own project?
Its repository publishes it under the MIT 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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