4 layers68 × 100 mm
Pocket caddy
bkuhn4/golf-gps
The Pocket Caddy hardware is built around the ESP32-C3 microcontroller and includes the following components:
90 parts
2 layers52.3 × 20.9 mm
Bugboard
NeerajR18/bugboardDevelopment board based on the STM32G431CBT6 (WIP)
- Size
- 52.3 × 20.9 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 28
- Nets
- 49
- Pads
- 162
- Tracks, vias
- 445, 48
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 29 Mar 2026
- Updated
- 27 Apr 2026
Overview
Bugboard is an open-source printed circuit board by NeerajR18, from the NeerajR18/bugboard repository on GitHub. It is a 2-layer board of 52.3 × 20.9 mm with 28 parts on 49 nets, routed with 445 tracks and 48 vias.
It is built around the BAT54C and PRTR5V0U2X. Its parts include 12 capacitors, 4 resistors, 4 connectors, 2 ICs and 2 diodes. It belongs with the STM32 boards of this library.
Main components
2
BAT54C
SOT-231 Pair Common Cathode 200mA 2uA@25V 30V 600mA 800mV@100mA SOT-23 Schottky Diodes ROHSNexperiaSchottky Diodes
PRTR5V0U2X
SOT-143-55℃~+125℃ 0.3pF、0.8pF 100W 10V、15V 5V 6.5V 6A 80nA ESD IEC 61000-4-2、IEC 61000-4-5、IEC 61000-4-4 Three channels Unidirectional SOT-143 ESD and Surge Protection (TVS/ESD) ROHSTECH PUBLICESD And Surge Protection (TVS/ESD)
README
README.mdbugboard
STM32 Based Development Board
Note : - This is still a work in progress.
bugboard is a development board with the STM32G431CBT6 as its core.
This development board is intended to be used in a keyboard PCB.
Features
- STM32G431CBT6
- Built-in USB-C Port
- Small size design
What is a development board?
A development board is a PCB (Printed Circuit Board) with an MCU along with other components such as a USB port, crystals etc. to make prototyping and designing circuits easier. Since it already has certain components, it can be used directly in many circuits to save cost as well as time. Development boards can vary in size, components, MCU type, amount of GPIOs etc.
bugboard, has the STM32G431CBT6 as its MCU and was made to be used in a PCB as well as a personal project to learn how to make bigger circuits for me.
PCB
-
Schematic
-
PCB
Front
Back
Images
Blender render of the PCB
This project was made using-
- KiCad
- Blender
Bill Of Materials
| Item | Qty. | Price (USD) | Ext. (USD) | Link |
|---|---|---|---|---|
| C529355 | 1 | 3.0856 | 3.09 | https://www.lcsc.com/product-detail/C529355.html |
| C105872 | 100 | 0.0009 | 0.09 | https://www.lcsc.com/product-detail/C105872.html |
| C60490 | 100 | 0.0008 | 0.08 | https://www.lcsc.com/product-detail/C60490 |
| C5446 | 5 | 0.1062 | 0.53 | https://www.lcsc.com/product-detail/C5446.html |
| C2765186 | 20 | 0.0617 | 1.23 | https://www.lcsc.com/product-detail/C2765186.html |
| C5180302 | 5 | 0.0403 | 0.2 | https://www.lcsc.com/product-detail/C5180302.html |
| C60474 | 100 | 0.0010 | 0.1 | https://www.lcsc.com/product-detail/C60474.html |
| C96446 | 20 | 0.0181 | 0.36 | https://www.lcsc.com/product-detail/C96446.html |
| C37704 | 20 | 0.0313 | 0.63 | https://www.lcsc.com/product-detail/C37704.html |
| C720477 | 10 | 0.056 | 0.56 | https://www.lcsc.com/product-detail/C720477.html |
Parts
28| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | 100nF | Capacitor_SMD:C_0402_1005Metric | C3, C4, C5, C7, C8, C9, C11, C12, C17 |
| 2 | 10k | Resistor_SMD:R_0402_1005Metric | R3, R4 |
| 2 | 10uF | Capacitor_SMD:C_0402_1005Metric | C1, C2 |
| 2 | 5k1 | Resistor_SMD:R_0402_1005Metric | R1, R2 |
| 2 | Conn_01x20 | Connector_PinHeader_2.54mm:PinHeader_1x20_P2.54mm_Vertical | J3, J4 |
| 2 | SW_SPST | Button_Switch_SMD:SW_SPST_TS-1088-xR020 | SW1, SW2 |
| 1 | 10uF | Capacitor_SMD:C_0603_1608Metric | C6 |
| 1 | 500mA | Fuse:Fuse_1206_3216Metric | F1 |
| 1 | BAT54C | Package_TO_SOT_SMD:SOT-23 | D1 |
| 1 | Conn_01x04 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J2 |
| 1 | LOGO | LOGO | G*** |
| 1 | PRTR5V0U2X | Package_TO_SOT_SMD:SOT-143 | D2 |
| 1 | STM32G431CBTx | Package_QFP:LQFP-48_7x7mm_P0.5mm | U1 |
| 1 | USB_C_Receptacle_USB2.0_16P | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J1 |
| 1 | XC6206PxxxMR | Package_TO_SOT_SMD:SOT-23-3 | U2 |
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Questions
How big is the Bugboard PCB?
It measures 52.3 × 20.9 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Bugboard use?
28 parts, built around the BAT54C and PRTR5V0U2X. 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 Bugboard KiCad files?
From the NeerajR18/bugboard repository on GitHub, at the commit this page was made from: the board is PCB/bugboard.kicad_pcb and its schematic PCB/bugboard.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Bugboard design in my own project?
Its repository states no licence, so its author keeps all rights: ask NeerajR18 before reusing the design.