B-Sides 2025
About the B-Sides 2025 PCB
B-Sides 2025 is an open source RISC-V PCB design by OklahomaOpenSourceHardware, published on GitHub. It is a 2-layer board measuring 111.8 × 119 mm, with 39 components from 19 distinct parts.
Its main chip is the C2052778, from the RISC-V family. By type, the board carries 14 resistors, 13 diodes, 4 capacitors, 3 transistors, 3 connectors and 1 IC.
It belongs with the wearables designs in this gallery.
From the project
2024 badge for Oklahoma PCB Tech Conferences
Main components on the B-Sides 2025
B-Sides 2025 bill of materials (BOM)
39 components, 19 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | C2052778 CH32V003FxUx | QFN-20-1EP_3x3mm_P0.4mm_EP1.65x1.65mm | U2 |
| 1 | C81445 PT19-21C/L41/TR8 | D_0603_1608Metric | Q1 |
| 1 | C347476 PT19-21C/L41/TR8 | D_0603_1608Metric | Q2 |
| 1 | Si2323DS | SOT-23 | Q3 |
| 1 | Conn_01x03_Pin | PinHeader_1x03_P2.54mm_Vertical | J1 |
| 1 | C92272 Conn_02x03_Counter_Clockwise | Simple_Addon_v2-BADGE-2x3 | J2 |
| 1 | Conn_02x03_Counter_Clockwise | Simple_Addon_v2-BADGE-2x3 | J3 |
| 1 | C964845 Battery | BatteryHolder_Keystone_3008_1x2450 | BT1 |
| 2 | C3647024 LED | LED_Kingbright_APA1606_1.6x0.6mm_Horizontal | D1, D2 |
| 10 | LED | LED_Kingbright_APA1606_1.6x0.6mm_Horizontal | D3, D4, D5, D6, D7, D8, D9, D10 +2 |
| 1 | D_Schottky_Small | D_SOD-323_HandSoldering | D13 |
| 3 | C12530 100n | C_0402_1005Metric | C1, C2, C3 |
| 1 | C12530 2u | C_0402_1005Metric | C4 |
| 3 | 1k | R_0402_1005Metric | R1, R11, R12 |
| 1 | C138021 10k | R_0402_1005Metric | R2 |
| 2 | C105872 82R | R_0402_1005Metric | R3, R5 |
| 1 | C138021 82R | R_0402_1005Metric | R4 |
| 1 | 82R | R_0402_1005Metric | R6 |
| 6 | 10k | R_0402_1005Metric | R7, R8, R9, R10, R13, R14 |
B-Sides 2025 design files
The KiCad project lives in the OklahomaOpenSourceHardware/OKC-OSH-2024-Badge repository on GitHub; these links point at the commit this page was built from.
B-Sides 2025: common questions
What microcontroller does the B-Sides 2025 use?
The B-Sides 2025 is built around the C2052778, from the RISC-V family.
How big is the B-Sides 2025 PCB?
The B-Sides 2025 measures 111.8 × 119 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the B-Sides 2025?
39 components, from 19 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 B-Sides 2025 design files?
From the OklahomaOpenSourceHardware/OKC-OSH-2024-Badge 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 B-Sides 2025 design in my own project?
The repository has no license, so all rights stay with OklahomaOpenSourceHardware. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the B-Sides 2025 without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RISC-V firmware against it before you order a PCB.
More boards in OKC-OSH-2024-Badge
RP2040/RP2350B-Sides 2024
99.5 × 124.8 mm147 parts2LNo license3
AVR/ArduinoB-Sides Badge
75.5 × 78.8 mm70 parts2LNo license3
RP2040/RP2350Techlahoma Badge 2024
43.5 × 40.5 mm68 parts2LNo license3
Nordic nRFTechno Buffalo
88.4 × 62.5 mm60 parts2LNo license3
AVR/ArduinoThunder Plains Badge 2024
88.4 × 62.5 mm48 parts2LNo license3
AVR/ArduinoB-Sides 2026
64.6 × 50.8 mm23 parts2LNo license3
Tplane2025
52.1 × 59.1 mm15 parts2LNo license3
SAO 2024
25.8 × 29.3 mm13 parts2LNo license3
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