BSPD
About the BSPD PCB
BSPD is an open source ESP32 PCB design by HKUST-Red-Bird-Racing-EVRT, published on GitHub. It is a 2-layer board measuring 57 × 50 mm, with 60 components from 38 distinct parts.
Its main chip is the ESP32-S3-WROOM-2, from the ESP32 family. Other key parts include the CH340C, TJA1051T-3, LM2576S-5, AMS1117-3.3 and LM324. By type, the board carries 29 resistors, 13 capacitors, 7 ICs, 3 transistors, 3 connectors and 1 fuse.
From the project
Repository for RBR EVRT 2025 EE
Main components on the BSPD
BSPD bill of materials (BOM)
60 components, 38 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ESP32-S3-WROOM-2 LM393 | SOIC-8_3.9x4.9mm_P1.27mm | U1 |
| 1 | CH340C LM393 | SOIC-8_3.9x4.9mm_P1.27mm | U2 |
| 1 | TJA1051T-3 74AHC1G00 | SOT-23-5_HandSoldering | U3 |
| 1 | LM2576S-5 74AHC1G00 | SOT-23-5_HandSoldering | U4 |
| 1 | AMS1117-3.3 LM78M05_TO252 | TO-252-2 | U5 |
| 1 | LM324 LM393 | SOIC-8_3.9x4.9mm_P1.27mm | U6 |
| 1 | TXS0102DCU LM393 | SOIC-8_3.9x4.9mm_P1.27mm | U7 |
| 1 | MMBT3904 AO3400A | SOT-23 | Q1 |
| 1 | MMBT3904 AO3401A | SOT-23 | Q2 |
| 1 | AO3400A | SOT-23 | Q3 |
| 1 | CONN_01X03 Conn_01x02 | Molex_Micro-Fit_3.0_43650-0215_1x02_P3.00mm_Vertical | J1 |
| 1 | USB_C_RECEPTACLE_USB2.0_14P Conn_01x02 | Molex_Micro-Fit_3.0_43650-0215_1x02_P3.00mm_Vertical | J2 |
| 1 | CONN_01X02 Conn_01x02 | Molex_Micro-Fit_3.0_43650-0215_1x02_P3.00mm_Vertical | J3 |
| 1 | Fuse | Fuse_0805_2012Metric_Pad1.15x1.40mm_HandSolder | F1 |
| 1 | SANYOU_SRD_Form_C | Relay_SPDT_SANYOU_SRD_Series_Form_C | K1 |
| 2 | 20k | Potentiometer_Bourns_3296W_Vertical | RV1, RV2 |
| 1 | 1N4148 | D_DO-35_SOD27_P7.62mm_Horizontal | D1 |
| 1 | 100NF 100u | CP_Radial_D5.0mm_P2.50mm | C1 |
| 1 | 10UF 100u | CP_Radial_D5.0mm_P2.50mm | C2 |
| 7 | 100NF 100n | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3, C4, C5, C6, C8, C10, C13 |
Show 18 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 100UF 100n | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C7 |
| 1 | 22UF 100n | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C9 |
| 1 | 330UF 100n | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C11 |
| 1 | 100NF 10u | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C12 |
| 1 | 4K7 100k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1 |
| 3 | 1k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2, R3, R7 |
| 2 | 10K 100k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4, R5 |
| 1 | 120R 1k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R6 |
| 4 | 100k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R8, R16, R28, R29 |
| 8 | 10k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R9, R10, R11, R12, R13, R18, R19, R20 |
| 1 | 40.2k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R14 |
| 2 | 39k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R15, R17 |
| 1 | 100R | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R21 |
| 1 | 1M | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R22 |
| 1 | 249K 750k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R23 |
| 1 | 10R 100R | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R24 |
| 1 | 10R 100k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R25 |
| 2 | 10R 10k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R26, R27 |
BSPD design files
The KiCad project lives in the HKUST-Red-Bird-Racing-EVRT/GEN5_ELEC repository on GitHub; these links point at the commit this page was built from.
BSPD: common questions
What microcontroller does the BSPD use?
The BSPD is built around the ESP32-S3-WROOM-2, from the ESP32 family.
How big is the BSPD PCB?
The BSPD measures 57 × 50 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the BSPD?
60 components, from 38 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 BSPD design files?
From the HKUST-Red-Bird-Racing-EVRT/GEN5_ELEC 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 BSPD design in my own project?
The repository has no license, so all rights stay with HKUST-Red-Bird-Racing-EVRT. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the BSPD without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.
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