2 layers85 × 50 mm
DataAcquisitionUnit
RobertGawron/HardwareDataLogger
Data logger shield based on STM32+ESP32. Has: LCD, keyboard, WIFi, UART and SD card for data storage. Input is as pulse counter and UART communication.
70 parts6MIT
2 layers85 × 50 mm
ProcessingAndStorage
RobertGawron/HardwareDataLogger6Data logger shield based on STM32+ESP32. Has: LCD, keyboard, WIFi, UART and SD card for data storage. Input is as pulse counter and UART communication.
- Size
- 85 × 50 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 62
- Nets
- 118
- Pads
- 292
- Tracks, vias
- 426, 166
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 15 Oct 2020
- Updated
- 11 Aug 2026
Overview
ProcessingAndStorage is an open-source printed circuit board by RobertGawron, from the RobertGawron/HardwareDataLogger repository on GitHub, published under the MIT licence. It is a 2-layer board of 85 × 50 mm with 62 parts on 118 nets, routed with 426 tracks and 166 vias.
It is built around the ESP32-WROOM-32E, CH340X and BC846, with the PJGBLC03C_R1_00001 among its other parts. Its parts include 15 capacitors, 15 resistors, 8 diodes, 4 ICs and 4 transistors. It belongs with the radio and wireless and home automation and IoT boards and the ESP32 and STM32 boards of this library.
Main components
4
ESP32-WROOM-32E
SMD,18x25.5mmSMD,18x25.5mm WiFi Modules ROHSEspressif SystemsWiFi Modules
CH340X
MSOP-10-20℃~+70℃ 2Mbps 3.3V、5V USB 2.0 USB to serial、USB to Parallel MSOP-10 USB Converters ROHSWCH (Nanjing Qinheng Microelectronics)USB Converters
BC846
SOT-23-65℃~+150℃ 1 NPN 100mA 110 15nA 250mW 400mV 65V 6V 770MHz NPN SOT-23 Bipolar (BJT) ROHSNexperiaBipolar (BJT)
PJGBLC03C_R1_00001
SOD-323-55℃~+150℃ 1A@8/20us 20uA 3.3V 350W@8/20us 3pF 5.25V 7.5V Bidirectional IEC 61000-4-2、IEC 61000-4-4 TVS SOD-323 ESD and Surge Protection (TVS/ESD) ROHSPANJIT InternationalESD And Surge Protection (TVS/ESD)
README
Hardware/ProcessingAndStorage/README.md
Parts
62| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | TestPoint | TestPoint:TestPoint_Pad_D1.5mm | TP1, TP2, TP3, TP4, TP5, TP6, TP7, TP8 |
| 7 | 10k | Resistor_SMD:R_0805_2012Metric | R1, R4, R5, R8, R17, R18, R20 |
| 5 | 330n | Capacitor_SMD:C_0805_2012Metric | C2, C3, C4, C10, C11 |
| 4 | 100n | Capacitor_SMD:C_0805_2012Metric | C5, C6, C18, C20 |
| 4 | 1k | Resistor_SMD:R_0805_2012Metric | R2, R3, R6, R11 |
| 4 | BC846 | Package_TO_SOT_SMD:SOT-23 | Q1, Q2, Q3, Q4 |
| 4 | LED | LED_SMD:LED_0402_1005Metric | D1, D2, D3, D4 |
| 4 | PJGBLC03C_R1_00001 | Diode_SMD:D_SOD-323F | D5, D6, D7, D8 |
| 4 | SolderJumper_2_Bridged | Jumper:SolderJumper-2_P1.3mm_Bridged_Pad1.0x1.5mm | JP1, JP2, JP3, JP4 |
| 3 | 10u | Capacitor_SMD:C_0805_2012Metric | C7, C8, C9 |
| 3 | 47k | Resistor_SMD:R_0805_2012Metric | R7, R10, R12 |
| 2 | 100u | Capacitor_SMD:CP_Elec_6.3x5.8 | C1, C12 |
| 2 | LD1117S50TR_SOT223 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U1, U3 |
| 1 | 22R | Resistor_SMD:R_0805_2012Metric | R9 |
| 1 | 4u7 | Capacitor_SMD:C_0805_2012Metric | C13 |
| 1 | CH340X | Package_SO:MSOP-10_3x3mm_P0.5mm | U2 |
| 1 | Conn_02x10_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x10_P2.54mm_Horizontal | J2 |
| 1 | ESP32-WROOM-32E | RF_Module:ESP32-WROOM-32D | U4 |
| 1 | SD_Card_Receptacle | Connector_Card:SD_TE_2041021 | J3 |
| 1 | USB_B_Micro | HardwareDataLogger:USB_Micro-B_Molex-105017-0001_Extra_Mechanical_Pads | J1 |
| 1 | ~ | HardwareDataLogger:ExtensionConnector | J6 |
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Questions
How big is the ProcessingAndStorage PCB?
It measures 85 × 50 mm and has 2 copper layers, 1.6 mm thick.
What parts does the ProcessingAndStorage use?
62 parts, built around the ESP32-WROOM-32E, CH340X, BC846 and PJGBLC03C_R1_00001. 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 ProcessingAndStorage KiCad files?
From the RobertGawron/HardwareDataLogger repository on GitHub, at the commit this page was made from: the board is Hardware/ProcessingAndStorage/ProcessingAndStorage.kicad_pcb and its schematic Hardware/DataAcquisitionUnit/DataAcquisitionUnit.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the ProcessingAndStorage 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).