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
DataProcessingUnit
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
- 50
- Nets
- 89
- Pads
- 243
- Tracks, vias
- 1,224, 321
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 15 Oct 2020
- Updated
- 11 Aug 2026
Overview
DataProcessingUnit 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 50 parts on 89 nets, routed with 1,224 tracks and 321 vias.
It is built around the LD1117S33TR(MS) and BC847. Its parts include 21 resistors, 17 capacitors, 3 connectors, 2 ICs and 2 crystals. It belongs with the radio and wireless and home automation and IoT boards and the ESP32 and STM32 boards of this library.
Main components
2
LD1117S33TR(MS)
SOT-223-20℃~+125℃@(Ta) 1 1.4V@(1A) 12V 1A 2mA 3.3V Fixed Over Temperature Protection Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSMSKSEMIVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
BC847
SOT-231 NPN 100MHz 100mA 100nA 110 200mW 45V 500mV 6V NPN SOT-23 Bipolar (BJT) ROHSShikuesBipolar (BJT)
README
Hardware/ProcessingAndStorage/README.md
Parts
50| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 100n | Capacitor_SMD:C_0805_2012Metric | C1, C2, C4, C6, C10, C15, C17, C19 |
| 6 | 100R | Resistor_SMD:R_0805_2012Metric | R7, R8, R9, R10, R12, R21 |
| 4 | 2k2 | Resistor_SMD:R_0805_2012Metric | R3, R4, R5, R6 |
| 3 | 10k | Resistor_SMD:R_0805_2012Metric | R1, R11, R17 |
| 3 | 10u | Capacitor_SMD:C_0805_2012Metric | C8, C16, C18 |
| 2 | 0R | Resistor_SMD:R_0805_2012Metric | R13, R14 |
| 2 | 0k | Resistor_SMD:R_0805_2012Metric | R19, R20 |
| 2 | 18p | Capacitor_SMD:C_0805_2012Metric | C11, C12 |
| 2 | 22p | Capacitor_SMD:C_0805_2012Metric | C13, C14 |
| 1 | 100k | Resistor_SMD:R_0805_2012Metric | R15 |
| 1 | 10n | Capacitor_SMD:C_0805_2012Metric | C3 |
| 1 | 1k | Resistor_SMD:R_0805_2012Metric | R2 |
| 1 | 1k5 | Resistor_SMD:R_0805_2012Metric | R16 |
| 1 | 32,768kHz | Crystal:Crystal_SMD_3215-2Pin_3.2x1.5mm | Y1 |
| 1 | 36k | Resistor_SMD:R_0805_2012Metric | R18 |
| 1 | 4u7 | Capacitor_SMD:C_0805_2012Metric | C5 |
| 1 | 8M | Crystal:Crystal_SMD_HC49-SD | Y2 |
| 1 | BC847 | Package_TO_SOT_SMD:SOT-23 | Q2 |
| 1 | Battery_Cell | Battery:BatteryHolder_Keystone_1060_1x2032 | BT1 |
| 1 | Conn_02x05_Odd_Even | Connector_PinSocket_2.00mm:PinSocket_2x05_P2.00mm_Horizontal | J3 |
| 1 | LD1117S33TR | Package_TO_SOT_SMD:SOT-223 | U2 |
| 1 | LED | LED_SMD:LED_0402_1005Metric | D4 |
| 1 | STM32F103RBTx | Package_QFP:LQFP-64_10x10mm_P0.5mm | U3 |
| 1 | SW_Push | Button_Switch_SMD:SW_SPST_EVPBF | SW1 |
| 1 | TestPoint | TestPoint:TestPoint_Pad_D1.5mm | TP1 |
| 1 | USB_B_Micro | HardwareDataLogger:USB_Micro-B_Molex-105017-0001_Extra_Mechanical_Pads | J2 |
| 1 | ~ | HardwareDataLogger:ExtensionConnector | J5 |
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Questions
How big is the DataProcessingUnit PCB?
It measures 85 × 50 mm and has 2 copper layers, 1.6 mm thick.
What parts does the DataProcessingUnit use?
50 parts, built around the LD1117S33TR(MS) and BC847. 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 DataProcessingUnit KiCad files?
From the RobertGawron/HardwareDataLogger repository on GitHub, at the commit this page was made from: the board is Hardware/DataProcessingUnit/DataProcessingUnit.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 DataProcessingUnit 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).