Class2
About the Class2 PCB
Class2 is an open source STM32 PCB design by rmd6502, published on GitHub. It is a 2-layer board measuring 110 × 110 mm, with 30 components from 15 distinct parts.
Its main chip is the STM32G030F6P6, from the STM32 family. Other key parts include the LR4054, TPS613222ADBV and AMS1117-3.3. By type, the board carries 12 diodes, 8 capacitors, 4 ICs, 3 connectors, 2 resistors and 1 inductor.
Main components on the Class2
Class2 bill of materials (BOM)
30 components, 15 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | STM32G030F6P6 | TSSOP-20_4.4x6.5mm_P0.65mm | U1 |
| 1 | LR4054 | SOT-23-5 | U2 |
| 1 | TPS613222ADBV TPS613222ADBZ | SOT-23 | U3 |
| 1 | AMS1117-3.3 | SOT-89-3 | U4 |
| 1 | C2927040 USB_C_Receptacle | USB_C_Receptacle_GCT_USB4135-GF-A_6P_TopMnt_Horizontal | J1 |
| 1 | CONN_01X02_PIN Conn_01x02_Pin | JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal | J2 |
| 1 | CONN_ARM_JTAG_SWD_10 Conn_ARM_JTAG_SWD_10 | PinHeader_2x05_P1.27mm_Vertical_SMD | J3 |
| 12 | WS2812B | LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mm | D1, D2, D3, D4, D5, D6, D7, D8 +4 |
| 1 | 4.7UH 4.7uh | L_Murata_DFE201610P | L1 |
| 2 | 100NF 100nf | C_0603_1608Metric | C1, C4 |
| 2 | 100N 100n | C_0603_1608Metric | C2, C3 |
| 2 | 10UF 10uf | CP_Elec_5x3 | C5, C6 |
| 2 | 4.7U 4.7u | CP_Elec_4x3 | C7, C8 |
| 1 | 2k | R_0603_1608Metric | R1 |
| 1 | 5K1 5k1 | R_0603_1608Metric | R2 |
Class2 design files
The KiCad project lives in the rmd6502/coaster repository on GitHub; these links point at the commit this page was built from.
Class2: common questions
What microcontroller does the Class2 use?
The Class2 is built around the STM32G030F6P6, from the STM32 family.
How big is the Class2 PCB?
The Class2 measures 110 × 110 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Class2?
30 components, from 15 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Class2 design files?
From the rmd6502/coaster repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Class2 design in my own project?
The repository has no license, so all rights stay with rmd6502. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Class2 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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