Class 2a prepot
About the Class 2a prepot PCB
Class 2a prepot is an open source STM32 PCB design by rmd6502, published on GitHub. It is a 2-layer board measuring 51.4 × 47.6 mm, with 32 components from 17 distinct parts.
Its main chip is the C724040, from the STM32 family. Other key parts include the LR4054, TPS613222ADBV and AMS1117-3.3. By type, the board carries 13 diodes, 8 capacitors, 4 ICs, 3 connectors, 2 resistors and 1 switch.
Main components on the Class 2a prepot
Class 2a prepot bill of materials (BOM)
32 components, 17 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | C724040 STM32G030F6P6 | TSSOP-20_4.4x6.5mm_P0.65mm | U1 |
| 1 | LR4054 | SOT-23-5 | U2 |
| 1 | TPS613222ADBV | SOT-23-5 | U3 |
| 1 | AMS1117-3.3 | SOT-89-3 | U4 |
| 1 | C2927040 USB_C_Receptacle | USB_C_Receptacle_GCT_USB4110 | J1 |
| 1 | CONN_01X02_PIN Conn_01x02_Pin | JST_PH_S2B-PH-SM4-TB_1x02-1MP_P2.00mm_Horizontal | J2 |
| 1 | CONN_ARM_JTAG_SWD_10 Conn_ARM_JTAG_SWD_10 | PinHeader_2x05_P1.27mm_Vertical_SMD | J3 |
| 1 | C221660 SW_SPST | SW_SPDT_PCM12 | SW1 |
| 12 | WS2812B | LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mm | D1, D2, D3, D4, D5, D6, D7, D8 +4 |
| 1 | SD103 | D_SOD-323F | D13 |
| 1 | 4.7UH 4.7uh | L_Vishay_IHLP-2020 | 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 |
Class 2a prepot design files
The KiCad project lives in the rmd6502/coaster repository on GitHub; these links point at the commit this page was built from.
Class 2a prepot: common questions
What microcontroller does the Class 2a prepot use?
The Class 2a prepot is built around the C724040, from the STM32 family.
How big is the Class 2a prepot PCB?
The Class 2a prepot measures 51.4 × 47.6 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Class 2a prepot?
32 components, from 17 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 Class 2a prepot design files?
From the rmd6502/coaster repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the Class 2a prepot 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 Class 2a prepot 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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