4 layers65 × 100 mm
4 layers180 × 35 mm
Open g db
tjussu/open_gOpen Source Datalogger for Glider Aerobatics
- Size
- 180 × 35 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 119
- Nets
- 114
- Pads
- 353
- Tracks, vias
- 445, 98
- Pours
- 16
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 29 Nov 2024
- Updated
- 12 Sep 2025
Overview
Open g db is an open-source printed circuit board by tjussu, from the tjussu/open_g repository on GitHub, published under the GPL-3.0 licence. It is a 4-layer board of 180 × 35 mm with 119 parts on 114 nets, routed with 445 tracks and 98 vias.
It is built around the ESP32-WROOM-32E, N7803-1C and N7805-1PH, with the TS04-66-75-BK-160-SMT, MAX7318AWG+ and BC848 among its other parts. Its parts include 52 resistors, 16 diodes, 14 transistors, 11 capacitors and 4 ICs. It belongs with the sensors and measurement boards and the ESP32 boards of this library.
Main components
7
ESP32-WROOM-32E
SMD,18x25.5mmSMD,18x25.5mm WiFi Modules ROHSEspressif SystemsWiFi ModulesN7803-1C
SIP-3SIP-3 Power Module/Power Supply ROHSMWPower Module/Power SupplyN7805-1PH
-- Power Module/Power Supply ROHSMWPower Module/Power Supply
TS04-66-75-BK-160-SMT
--30℃~+80℃ 1.6N 12V 50mA 80,000 cycles Gull Wing Round Button SPST Surface Mount,Vertical - Tactile Switches ROHSCUITactile Switches
MAX7318AWG+
SOIC-24-300mil-40℃~+125℃ 2V~5.5V 400kHz I2C、SMBus Interrupt Output Reset function、Cascading and address extension SOIC-24-300mil I/O Expanders ROHSMaxim Integrated (Analog Devices)I/O Expanders
BC848
SOT-23SOT-23 Bipolar (BJT) ROHSTDDBipolar (BJT)
STPS8H100D
TO-220AC1 Independent 100V 250A 4.5uA@100V 820mV@8A 8A TO-220AC Schottky Diodes ROHSSTMicroelectronicsSchottky Diodes
README
README.mdOpenG Project
Currently, the project is in the prototyping phase.
Overview
The goal of this project is to develop an open-source data logger for soaring and glider aerobatics. The hardware can be built by anyone interested and modified for their own purposes.
Goals
Specific implementation goals are:
- A watchdog for structural load factors:
- The load factors are measured in correspondence with the flight envelope (speed & load factors).
- Critical events will be saved to memory.
- The load factors can be displayed on a module.
- Path tracing for aerobatics:
- Tracking of the flight path for training evaluation.
- Easy construction:
- No difficult-to-solder SMD parts.
- PCB can be ordered from an online EMS.
- 3D-printable casing.
- Construction cost under 450 €.
- Easy modification.
- Documentation:
- Hardware documentation.
- Software documentation.
- User manual.
- Technical reference.
We aim to design the hardware in such a way that the system is compliant with EASA regulations.
Collaboration
The project is part of a master's thesis conducted at the Dortmund University of Applied Sciences and Arts in cooperation with the Luftsportfreunde 2000 Kamen/Dortmund club.
Thanks to both!
Future Updates
Further information will be provided in the near future.
Parts
119| Qty | Value | Footprint | References |
|---|---|---|---|
| 19 | 0R | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R11, R12, R13, R20, R21, R22, R43, R44, R45, R46, R47, R48, R49, R50, R51 +3 |
| 16 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5, R7, R10, R17, R18, R19, R33, R34, R35, R36, R37, R38, R39, R40, R41, R42 |
| 14 | BC848 | Package_TO_SOT_SMD:SOT-23 | Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, Q10, Q11, Q12, Q13, Q14 |
| 11 | TestPoint | TestPoint:TestPoint_Pad_D2.5mm | TP1, TP2, TP3, TP4, TP5, TP6, TP7, TP8, TP9, TP10, TP11 |
| 10 | 130 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R23, R24, R25, R26, R27, R28, R29, R30, R31, R32 |
| 6 | LED_or | LED_THT:LED_D3.0mm_Horizontal_O1.27mm_Z2.0mm_Clear | D10, D11, D12, D13, D14, D15 |
| 5 | 1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3, R4, R14, R15, R16 |
| 4 | 0.1u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2, C6, C7 |
| 3 | LED_gr | LED_THT:LED_D3.0mm_Horizontal_O1.27mm_Z2.0mm_Clear | D7, D8, D9 |
| 3 | LED_wh | LED_THT:LED_D3.0mm_Horizontal_O1.27mm_Z2.0mm_Clear | D4, D5, D6 |
| 2 | 10u | Capacitor_THT:CP_Radial_D5.0mm_P2.00mm | C4, C9 |
| 2 | 22u | Capacitor_THT:CP_Radial_D5.0mm_P2.00mm | C5, C10 |
| 2 | LOGO | LOGO | , |
| 2 | MountingHole | MountingHole:MountingHole_3mm_Pad_Via | H1, H2 |
| 2 | TS04-66-75-BK-160-SMT | SamacSys_Parts:TS046675BK160SMT | IC1, IC2 |
| 1 | 100k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R8 |
| 1 | 1MS1T1B4M7QES | SamacSys_Parts:1MS1T1B4M7QES | S1 |
| 1 | 1u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3 |
| 1 | 2-1825027-0 | SamacSys_Parts:218250270 | J2 |
| 1 | 22u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C8 |
| 1 | 47n | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C11 |
| 1 | 510 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2 |
| 1 | CMI-0955-03TH | SamacSys_Parts:CMI095503TH | LS1 |
| 1 | DE9_Socket | SamacSys_Parts:NFD17E09SAFC1DA | J1 |
| 1 | ESP32-WROOM-32E | RF_Module:ESP32-WROOM-32E | U1 |
| 1 | Fuse | SamacSys_Parts:3557-2 | F1 |
| 1 | LED_rd | LED_THT:LED_D3.0mm_Horizontal_O1.27mm_Z2.0mm_Clear | D16 |
| 1 | MAX7318AWG+ | Package_SO:SOIC-24W_7.5x15.4mm_P1.27mm | U2 |
| 1 | MMBD352WT1G | SamacSys_Parts:SOT65P220X100-3N | D3 |
| 1 | N7803-1C | SamacSys_Parts:N78031C | PS1 |
| 1 | N7805-1PH | SamacSys_Parts:N78031C | PS2 |
| 1 | PWR_LED | LED_THT:LED_D3.0mm_Horizontal_O1.27mm_Z2.0mm_Clear | D2 |
| 1 | STPS8H100D | SamacSys_Parts:TO515P460X1020X2008-2P | D1 |
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Questions
How big is the Open g db PCB?
It measures 180 × 35 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Open g db use?
119 parts, built around the ESP32-WROOM-32E, N7803-1C, N7805-1PH and TS04-66-75-BK-160-SMT. 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 Open g db KiCad files?
From the tjussu/open_g repository on GitHub, at the commit this page was made from: the board is hardware/Display Board/open_g_db.kicad_pcb and its schematic hardware/Display Board/Portexpander_LED.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Open g db design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).