2 layers18.3 × 17 mm
LTC6373 Daughterboard
NathansLab/WirelessBERA
KiCad 10 project for the Wireless BERA v1.0 board.
14 parts
4 layers73 × 94 mm
WirelessBERA
NathansLab/WirelessBERAKiCad 10 project for the Wireless BERA v1.0 board.
- Size
- 73 × 94 mm
- Copper layers
- 4
- Thickness
- 1.58 mm
- Parts
- 183
- Nets
- 125
- Pads
- 626
- Tracks, vias
- 1,083, 466
- Pours
- 5
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 29 May 2026
- Updated
- 16 Oct 2026
Overview
WirelessBERA is an open-source printed circuit board by NathansLab, from the NathansLab/WirelessBERA repository on GitHub. It is a 4-layer board of 73 × 94 mm with 183 parts on 125 nets, routed with 1,083 tracks and 466 vias.
It is built around the ESP32-S3-WROOM-1-N16R8, LTC6373IDFM#PBF and OPA376AIDBVR-MS, with the TPS63000DRCR, TPS65132WRVCR and BQ24074RGTR among its other parts. Its parts include 62 capacitors, 50 resistors, 13 connectors, 11 ICs and 3 diodes. It belongs with the ESP32 boards of this library.
Main components
12
ESP32-S3-WROOM-1-N16R8
SMD,25.5x18mm-103.5dBm -40℃~+65℃ 2.4GHz 20.5dBm 355mA 3V~3.6V 95mA ESP32-S3R8 On-board PCB Antenna UART、SPI、I2C、GPIO、I2S、USB SMD,25.5x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
LTC6373IDFM#PBF
DFN-12-EP(4x4)-18V~18V -40℃~+85℃ 0.012% 1.7uV/℃ 103dB 105dB 12V/us 25pA 25pA 4.4mA 40mA 8nV/√Hz@10kHz 92uV Differential Digitally programmable gain、Enable/shutdown function、Integrated ADC driver DFN-12-EP(4x4) Instrumentation Amplifiers ROHSAnalog DevicesInstrumentation Amplifiers
OPA376AIDBVR-MS
SOT-23-5-2.75V~-1V、1V~2.75V -25℃~+125℃ 1 130dB 2V~5.5V 2uV 30mA 30nV/℃ 500pA 50pA 5V/us 600uA 6MHz 6nV/√Hz@1kHz Rail-to-Rail Input, Rail-to-Rail Output Reverse-phase input protection SOT-23-5 Precision Op Amps ROHSMSKSEMIOperational Amplifier
TPS63000DRCR
SON-10-EP(3.1x3.1)-40℃~+85℃@(TA) 1 1.2V~5.5V 1.5MHz 1.8V~5.5V 50uA Adjustable Buck-Boost Buck-Boost Built-in Yes SON-10-EP(3.1x3.1) DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
TPS65132WRVCR
WQFN-20-EP(3x4)-40℃~+85℃ 1.8MHz 2.5V~5.5V 540uA 540uA I²C WQFN-20-EP(3x4) OLED Drivers ROHSTexas InstrumentsLCD Drivers
BQ24074RGTR
QFN-16-EP(3x3)-40℃~+125℃ 1 1.5A 4.2V 4.35V~10.2V 6.5uA Charging IC Lithium Battery Not supported Support QFN-16-EP(3x3) Battery Management ROHSTexas InstrumentsBattery ManagementTPS7A2033PDBVR-TP
SOT-23-5-40℃~+85℃ 1 180uV@(300mA) 2uA 3.3V 300mA 5.5V 75dB@(1kHz) Fixed Over Current Protection、Enable、Thermal Shutdown Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTECH PUBLICUncategorised
TPS7A3901DSCR
WSON-10-EP(3x3)-40℃~+125℃@(Tj) 0V~30V、1.2V~30V 150mA 2 33V 56dB@(100kHz) Adjustable Positive and Negative Thermal shutdown、Enable control、Input under-voltage protection、Adjustable soft-start WSON-10-EP(3x3) Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTexas InstrumentsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
TPS7A9401DSCR
WSON-10(3x3)-40℃~+125℃@(Tj) 0.46uVrms 0V~5.5V 1 1A 240mV@(1A) 5.7V 51dB@(1MHz) Adjustable Over Current Protection、Over Temperature Protection Positive WSON-10(3x3) Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTexas InstrumentsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
CRCW060310K0FKEAC
0603-55℃~+155℃ 100mW 10kΩ 75V Thick Film Resistor ±1% ±100ppm/℃ 0603 Chip Resistor - Surface Mount ROHSVishay IntertechnologyChip Resistor - Surface MountCRCW06031R00FKEAC
0603Chip Resistor - Surface MountVishay IntertechnologyCRCW06035K10FKEA
0603-55℃~+155℃ 100mW 5.1kΩ 75V Thick Film Resistor ±1% ±100ppm/℃ 0603 Chip Resistor - Surface Mount ROHSVishay IntertechnologyChip Resistor - Surface Mount
README
hardware/README.mdHardware
KiCad 10 project for the Wireless BERA v1.0 board.
Layout
WirelessBERA.kicad_pro | open this — the root project |
WirelessBERA.kicad_sch | root sheet; the design is split into three sub-sheets |
MCU.kicad_sch | ESP32-S3-WROOM-1, USB-C, microSD, buttons, status LED |
Analog.kicad_sch | LTC6373 PGIA, TAC5212 codec, OPA376 DRL, MEMS microphone, jacks |
Power.kicad_sch | BQ24074 charger, TPS63000, TPS65132W, TPS7A39/7A94/7A2033 |
WirelessBERA.kicad_pcb | 4-layer layout, split GNDA/GNDD |
WirelessBERA.kicad_dru | Aisler 4-layer design rules |
library/ | project symbols, footprints and 3D models |
daughterboard/ | separate LTC6373 evaluation board, fixed gain 16 |
simulation/ | LTspice work behind the analog design |
manufacturing/ | what v1.0 was actually built from |
datasheets/ | vendor PDFs — present on disk, deliberately not in git |
Key reference designators
U7 | ESP32-S3-WROOM-1-N16R8 |
U10 | LTC6373 programmable-gain instrumentation amplifier |
U11 | TAC5212 codec, I²C address 0x50 |
U9 | OPA376 driven-right-leg driver |
U5 | TPS65132W dual charge pump, I²C address 0x3E |
MK1 | IM73A135 MEMS microphone |
J6 | electrode jack (3.5 mm TRS): tip = DRL, ring = Electrode+, sleeve = Electrode− |
J11 | stimulus jack (3.5 mm TRS): tip = OUT2P, ring = OUT1P, sleeve = GNDA |
J4 | microSD slot · J5 USB-C · J1 battery (JST PH) |
J7–J10, J12, J13, TP1–TP22 | test headers and points |
The authoritative pin map as used by the firmware lives in
../firmware/wireless_bera/main/board.h.
Assembly state
The populated v1.0 board and what is deliberately left off it are documented in
../docs/hardware_bringup_plan.md.
Parts
183| Qty | Value | Footprint | References |
|---|---|---|---|
| 22 | TestPoint_Small | TestPoint:TestPoint_Pad_D1.5mm | TP1, TP2, TP3, TP10, TP11, TP12, TP13, TP14, TP15, TP16, TP17, TP18, TP19, TP20, TP21, TP22 +6 |
| 20 | 10k | Resistor_SMD:R_0603_1608Metric | R3, R13, R14, R22, R23, R24, R25, R26, R27, R28, R29, R30, R31, R35, R36, R37 +4 |
| 19 | 10u | Capacitor_SMD:C_0805_2012Metric | C3, C4, C5, C10, C14, C15, C17, C22, C25, C26, C29, C31, C33, C35, C36, C38 +3 |
| 18 | 100n | Capacitor_SMD:C_0603_1608Metric | C11, C16, C19, C27, C30, C32, C37, C39, C41, C42, C43, C44, C45, C46, C47, C57 +2 |
| 7 | 4.7u | Capacitor_SMD:C_0805_2012Metric | C1, C2, C7, C18, C20, C21, C24 |
| 7 | FerriteBead | Inductor_SMD:L_0805_2012Metric | FB1, FB2, FB3, FB4, FB5, FB6, FB7 |
| 6 | 1R | Resistor_SMD:R_0603_1608Metric | R1, R5, R11, R16, R17, R18 |
| 5 | 22u | Capacitor_SMD:C_0805_2012Metric | C40, C55, C58, C60, C62 |
| 4 | 5.1k | Resistor_SMD:R_0603_1608Metric | R2, R7, R33, R34 |
| 4 | MountingHole | MountingHole:MountingHole_2.2mm_M2 | H1, H2, H3, H4 |
| 4 | PinHeader_01x04_2.54mm_Vertical | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J7, J8, J10, J12 |
| 3 | 1M | Resistor_SMD:R_0603_1608Metric | R39, R42, R44 |
| 3 | 1u | Capacitor_SMD:C_0603_1608Metric | C12, C50, C59 |
| 3 | Fiducial | Fiducial:Fiducial_0.5mm_Mask1mm | FID1, FID2, FID3 |
| 2 | 0R | Resistor_SMD:R_0603_1608Metric | R46, R49 |
| 2 | 10R | Resistor_SMD:R_0603_1608Metric | R47, R48 |
| 2 | 10n | Capacitor_SMD:C_0603_1608Metric | C13, C23 |
| 2 | 10u | Capacitor_SMD:C_0603_1608Metric | C48, C53 |
| 2 | AudioJack3 | Connector_Audio:Jack_3.5mm_CUI_SJ1-3523N_Horizontal | J6, J11 |
| 2 | LED | LED_SMD:LED_0603_1608Metric | D1, D2 |
| 2 | PinHeader_01x01_2.54mm_Vertical | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | J2, J3 |
| 2 | SW_Push | Button_Switch_SMD:SW_SPST_EVQP2_MiddlePushTravel_H2.5mm | SW2, SW3 |
| 2 | TBD | Resistor_SMD:R_0603_1608Metric | R38, R45 |
| 2 | TBD | Capacitor_SMD:C_0603_1608Metric | C49, C52 |
| 1 | 1.1k | Resistor_SMD:R_0603_1608Metric | R8 |
| 1 | 1.2M | Resistor_SMD:R_0603_1608Metric | R20 |
| 1 | 100R | Resistor_SMD:R_0603_1608Metric | R19 |
| 1 | 110k | Resistor_SMD:R_0603_1608Metric | R41 |
| 1 | 180p | Capacitor_SMD:C_0603_1608Metric | C54 |
| 1 | 1n | Capacitor_SMD:C_0603_1608Metric | C51 |
| 1 | 2.2k | Resistor_SMD:R_0603_1608Metric | R9 |
| 1 | 2.2u | Inductor_SMD:L_0805_2012Metric | L2 |
| 1 | 2.2u | Capacitor_SMD:C_0603_1608Metric | C28 |
| 1 | 200k | Resistor_SMD:R_0603_1608Metric | R21 |
| 1 | 22.1k | Resistor_SMD:R_0603_1608Metric | R10 |
| 1 | 32.4k | Resistor_SMD:R_0603_1608Metric | R12 |
| 1 | 330R | Resistor_SMD:R_0603_1608Metric | R32 |
| 1 | 4.7p | Capacitor_SMD:C_0603_1608Metric | C34 |
| 1 | 4.7uH | Inductor_SMD:L_1008_2520Metric | L1 |
| 1 | 4.99k | Resistor_SMD:R_0603_1608Metric | R40 |
| 1 | 42.2k | Resistor_SMD:R_0603_1608Metric | R15 |
| 1 | BQ24074RGT | Package_DFN_QFN:VQFN-16-1EP_3x3mm_P0.5mm_EP1.6x1.6mm | U2 |
| 1 | CMKD6000 | Package_TO_SOT_SMD:SOT-363_SC-70-6 | D3 |
| 1 | Conn_01x02 | Connector_JST:JST_PH_S2B-PH-SM4-TB_1x02-1MP_P2.00mm_Horizontal | J1 |
| 1 | ESP32-S3-WROOM-1 | RF_Module:ESP32-S3-WROOM-1 | U7 |
| 1 | IM73A135V01 | Sensor_Audio:Infineon_PG-LLGA-5-2 | MK1 |
| 1 | LTC6373 | BERA Project Specific Footprints:LTC6373_DFN-12 | U10 |
| 1 | Micro_SD_Card | Connector_Card:microSD_HC_Wuerth_693072010801 | J4 |
| 1 | NetTie | NetTie:NetTie-2_SMD_Pad2.0mm | NT1 |
| 1 | OPA376xxDBV | Package_TO_SOT_SMD:SOT-23-5 | U9 |
| 1 | PinHeader_01x02_2.54mm_Vertical | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J13 |
| 1 | PinHeader_01x03_2.54mm_Vertical | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J9 |
| 1 | SW_SPDT | Button_Switch_SMD:SW_SPDT_CK_JS102011SAQN | SW1 |
| 1 | TAC5212 | BERA Project Specific Footprints:TAC5212_VQFN24 | U11 |
| 1 | TPS63000 | Package_SON:Texas_DRC0010J_ThermalVias | U6 |
| 1 | TPS65132W | BERA Project Specific Footprints:TPS65132W_WQFN-20-TI | U5 |
| 1 | TPS7A2033PDBVR | Package_TO_SOT_SMD:SOT-23-5 | U1 |
| 1 | TPS7A39 | Package_SON:Texas_S-PVSON-N10_ThermalVias | U4 |
| 1 | TPS7A94 | BERA Project Specific Footprints:TPS7A94_WSON-10 | U3 |
| 1 | USB_C_Receptacle | Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J5 |
| 1 | WE-TVS-82400102 | Package_TO_SOT_SMD:SOT-23-6 | U8 |
| 1 | WE_CNSW_744232090 | Inductor_SMD:L_CommonMode_Wurth_WE-CNSW-1206 | L3 |
Questions
How big is the WirelessBERA PCB?
It measures 73 × 94 mm and has 4 copper layers, 1.58 mm thick.
What parts does the WirelessBERA use?
183 parts, built around the ESP32-S3-WROOM-1-N16R8, LTC6373IDFM#PBF, OPA376AIDBVR-MS and TPS63000DRCR. 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 WirelessBERA KiCad files?
From the NathansLab/WirelessBERA repository on GitHub, at the commit this page was made from: the board is hardware/WirelessBERA.kicad_pcb and its schematic hardware/Analog.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the WirelessBERA design in my own project?
Its repository states no licence, so its author keeps all rights: ask NathansLab before reusing the design.
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