Candlelight GNX
raulperdomo·Candlelight_GNX
About the Candlelight GNX PCB
Candlelight GNX is an open source STM32 PCB design by raulperdomo, published on GitHub. It is a 2-layer board measuring 117.4 × 57.8 mm, with 27 components from 17 distinct parts.
Its main chip is the STM32G0B1CBT6, from the STM32 family. Other key parts include the MAX7375AXR805, TJA1051T-3 and MCP1754S-3302xMB. By type, the board carries 9 capacitors, 8 resistors, 5 connectors, 4 ICs and 1 speaker.
It belongs with the usb & debug tools designs in this gallery.
From the project
A stylish CAN FD interface device shaped like the iconic Buick GNX, combining classic automotive aesthetics with modern CAN bus functionality.
A stylish CAN FD interface device shaped like the iconic Buick GNX, combining classic automotive aesthetics with modern CAN bus functionality.
The Candlelight GNX is a clone of the popular candlelightfd CAN FD interface, reimagined in the distinctive silhouette of the legendary Buick Grand National GNX. This USB-to-CAN adapter provides CAN bus communication capabilities while paying homage to one of the most iconic performance cars of the 1980s.

Main components on the Candlelight GNX
Candlelight GNX bill of materials (BOM)
27 components, 17 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | STM32G0B1CBT6 | LQFP48_STM32G0B1CBT_STM | U1 |
| 1 | MAX7375AXR805 | SOT-323_SC-70 | U2 |
| 1 | TJA1051T-3 | SOIC-8_3.9x4.9mm_P1.27mm | U4 |
| 1 | MCP1754S-3302xMB | SOT-89-3 | U5 |
| 2 | Conn_01x02_Pin | PinHeader_1x02_P2.54mm_Vertical | J1, J4 |
| 1 | Screw_Terminal_01x03 | TerminalBlock_TE_282834-3_1x03_P2.54mm_Horizontal | J2 |
| 1 | Conn_ARM_JTAG_SWD_10 | PinHeader_2x05_P1.27mm_Vertical_SMD | J3 |
| 1 | USB4105-xx-A_16P_TopMnt | USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J5 |
| 1 | SMTB-0940-T-3V-R | XDCR_SMTB-0940-T-3V-R | LS1 |
| 2 | 10uf | C_0603_1608Metric | C1, C2 |
| 3 | 100nF | C_0603_1608Metric | C3, C4, C5 |
| 1 | .1uF | C_0603_1608Metric | C6 |
| 3 | 100 nF | C_0603_1608Metric | C7, C8, C9 |
| 4 | 1k Ohm | R_0603_1608Metric | R1, R2, R7, R8 |
| 2 | 5k1 | R_0603_1608Metric | R3, R4 |
| 1 | 120 Ohm | R_0603_1608Metric | R5 |
| 1 | 10k | R_0603_1608Metric | R6 |
Candlelight GNX design files
The KiCad project lives in the raulperdomo/Candlelight_GNX repository on GitHub; these links point at the commit this page was built from.
- LayoutDefcon_33.kicad_pcb
- SchematicDefcon_33.kicad_sch
Candlelight GNX: common questions
What microcontroller does the Candlelight GNX use?
The Candlelight GNX is built around the STM32G0B1CBT6, from the STM32 family.
How big is the Candlelight GNX PCB?
The Candlelight GNX measures 117.4 × 57.8 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Candlelight GNX?
27 components, from 17 distinct parts. The full bill of materials is listed on this page.
Where can I download the Candlelight GNX design files?
From the raulperdomo/Candlelight_GNX repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Candlelight GNX design in my own project?
The repository has no license, so all rights stay with raulperdomo. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Candlelight GNX without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.
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