2 layers60.8 × 36 mm
SecCentralUnit
albertdolata/Sensitive-Parameter-Recorder
This repository is intended for an academic project.
22 parts2
4 layers85.3 × 54.5 mm
CentralUnit
albertdolata/Sensitive-Parameter-Recorder2This repository is intended for an academic project.
- Size
- 85.3 × 54.5 mm
- Copper layers
- 4
- Thickness
- 1.61 mm
- Parts
- 70
- Nets
- 118
- Pads
- 345
- Tracks, vias
- 462, 335
- Pours
- 16
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 2 Apr 2026
- Updated
- 4 Sep 2026
Overview
CentralUnit is an open-source printed circuit board by albertdolata, from the albertdolata/Sensitive-Parameter-Recorder repository on GitHub. It is a 4-layer board of 85.3 × 54.5 mm with 70 parts on 118 nets, routed with 462 tracks and 335 vias.
It is built around the ESP32-S3-WROOM-1-N8, SIM7070G and LIS3DH, with the MIC29302AWD, XC6220B331MR and SS34 among its other parts. Its parts include 24 capacitors, 21 resistors, 8 diodes, 6 ICs and 3 connectors. It belongs with the ESP32 boards of this library.
Main components
8
ESP32-S3-WROOM-1-N8
SMD,25.5x18mm-40℃~+85℃ -98.2dBm 2.4GHz 20.5dBm 355mA 3V~3.6V 95mA Bluetooth5.0 ESP32-S3 Chip On-board PCB Antenna UART、SPI、I2C、I2S、USB SMD,25.5x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
SIM7070G
LCC-68(24x24)-40℃~+85℃ 21dBm 3V~4.6V 850MHz、900MHz、1.8GHz、1.9GHz SPI、UART、I2C、PCM LCC-68(24x24) RF Modules ROHSSIMCom Wireless SolutionsRF Modules
LIS3DH
LGA-16(3x3)-40℃~+85℃ 1.71V~3.6V 16bit 500nA Accelerometer Motion event detection SPI、I2C X,Y,Z ±16g LGA-16(3x3) Accelerometers ROHSSTMicroelectronicsAccelerometers
MIC29302AWD
TO-252-5-40℃~+125℃@(Tj) 1 1.24V~15V 16V 3A 400uVrms 800mV@(3A) Adjustable Over Current Protection、Over Temperature Protection、Enable Positive TO-252-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSMicrochip TechnologyVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
XC6220B331MR
SOT-23-5-40℃~+85℃@(Ta) 1 25uA 3.3V 400mV@(800mA) 5.5V 50dB@(10kHz) 900mA Fixed Over Current Protection、Over Temperature Protection Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTECH PUBLICVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
SS34
SMA(DO-214AC)-55℃~+125℃ 3A 40V 500uA@40V 550mV@3A Independent SMA(DO-214AC) Schottky Diodes ROHSMDDSchottky Diodes
BC817
SOT-231 NPN 100nA 150MHz 300mW 40 45V 500mA 5V 700mV NPN SOT-23 Bipolar (BJT) ROHSShikuesBipolar (BJT)
ESDA6V1-5SC6
SOT-23-6100nA 10A@8/20us 11V、14V 140W@8/20us 5V 60pF 9V ESD IEC 61000-4-2、IEC 61000-4-4 SOT-23-6 ESD and Surge Protection (TVS/ESD) ROHSTECH PUBLICESD And Surge Protection (TVS/ESD)
Parts
70| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 100n | Capacitor_SMD:C_0402_1005Metric | C8, C12, C14, C16, C17, C19, C23 |
| 5 | 10u | Capacitor_SMD:C_0402_1005Metric | C2, C13, C18, C20, C21 |
| 4 | 10k | Resistor_SMD:R_0402_1005Metric | R12, R14, R16, R21 |
| 4 | 1k | Resistor_SMD:R_0402_1005Metric | R9, R11, R13, R15 |
| 3 | 22p | Capacitor_SMD:C_0402_1005Metric | C9, C10, C11 |
| 3 | 51R | Resistor_SMD:R_0402_1005Metric | R7, R8, R10 |
| 2 | 100u | Capacitor_Tantalum_SMD:CP_EIA-3216-18_Kemet-A | C1, C5 |
| 2 | 1u | Capacitor_SMD:C_0402_1005Metric | C6, C22 |
| 2 | 2k2 | Resistor_SMD:R_0402_1005Metric | R19, R20 |
| 2 | 33p | Capacitor_SMD:C_0402_1005Metric | C3, C24 |
| 2 | 4.7k | Resistor_SMD:R_0402_1005Metric | R1, R2 |
| 2 | 5.1k | Resistor_SMD:R_0402_1005Metric | R17, R18 |
| 2 | SS34 | Diode_SMD:D_SMA | D7, D8 |
| 1 | 100k | Resistor_SMD:R_0402_1005Metric | R3 |
| 1 | 10R | Resistor_SMD:R_0402_1005Metric | R22 |
| 1 | 10p | Capacitor_SMD:C_0402_1005Metric | C4 |
| 1 | 220n | Capacitor_SMD:C_0402_1005Metric | C15 |
| 1 | 27nH | Inductor_SMD:L_0402_1005Metric | L1 |
| 1 | 330u | Capacitor_Tantalum_SMD:CP_EIA-6032-28_Kemet-C | C7 |
| 1 | 43k | Resistor_SMD:R_0402_1005Metric | R5 |
| 1 | 470R | Resistor_SMD:R_0402_1005Metric | R4 |
| 1 | 5.1V 500mW | Diode_SMD:Nexperia_CFP3_SOD-123W | D1 |
| 1 | BC817 | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | BOOT | Button_Switch_SMD:SW_Tactile_SPST_NO_Straight_CK_PTS636Sx25SMTRLFS | SW1 |
| 1 | ESDA6V1-5SC6 | Package_TO_SOT_SMD:SOT-23-6 | D3 |
| 1 | ESP32-S3-WROOM-1 | RF_Module:ESP32-S3-WROOM-1 | U4 |
| 1 | GNSS | Connector_Coaxial:U.FL_Molex_MCRF_73412-0110_Vertical | AE1 |
| 1 | GSM | Connector_Coaxial:U.FL_Molex_MCRF_73412-0110_Vertical | AE2 |
| 1 | HIH8130 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U5 |
| 1 | I2C | Jumper:SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP1 |
| 1 | LIS3DH | Package_LGA:LGA-16_3x3mm_P0.5mm_LayoutBorder3x5y | U3 |
| 1 | MIC29302AWD | PCM_Package_TO_SOT_SMD_AKL:TO-252-5_1.27mm_TabPin3 | U2 |
| 1 | NETLIGHT | LED_SMD:LED_0805_2012Metric | D2 |
| 1 | POWER | LED_SMD:LED_0805_2012Metric | D4 |
| 1 | RST | Button_Switch_SMD:SW_Tactile_SPST_NO_Straight_CK_PTS636Sx25SMTRLFS | SW2 |
| 1 | S3KM1110 | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J3 |
| 1 | SIM7070G | Snapeda:SIM7070G_MODULE_SIM7070G | U1 |
| 1 | SIM_HOLDER | Connector_Card:nanoSIM_SMN-303 | SIM1 |
| 1 | STATUS | LED_SMD:LED_0805_2012Metric | D5 |
| 1 | UART0 | Connector_PinHeader_1.00mm:PinHeader_1x04_P1.00mm_Vertical_SMD_Pin1Left | J2 |
| 1 | USB_C | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J1 |
| 1 | USER | LED_SMD:LED_0805_2012Metric | D6 |
| 1 | XC6220B331MR | Package_TO_SOT_SMD:SOT-23-5 | U6 |
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Questions
How big is the CentralUnit PCB?
It measures 85.3 × 54.5 mm and has 4 copper layers, 1.61 mm thick.
What parts does the CentralUnit use?
70 parts, built around the ESP32-S3-WROOM-1-N8, SIM7070G, LIS3DH and MIC29302AWD. 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 CentralUnit KiCad files?
From the albertdolata/Sensitive-Parameter-Recorder repository on GitHub, at the commit this page was made from: the board is PCB/CentralUnit/CentralUnit.kicad_pcb and its schematic PCB/CentralUnit/CentralUnit.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the CentralUnit design in my own project?
Its repository states no licence, so its author keeps all rights: ask albertdolata before reusing the design.