Brakechopper v1 1
About the Brakechopper v1 1 PCB
Brakechopper v1 1 is an open source ESP32 PCB design by jollydodo, published on GitHub under the Custom license license. It is a 2-layer board measuring 35 × 23 mm, with 43 components from 18 distinct parts.
Its main chip is the ESP32-S3, from the ESP32 family. Other key parts include the TPS54331DR and CYA0630-6.8UH. By type, the board carries 33 resistors, 3 ICs, 3 capacitors, 2 transistors and 2 diodes.
From the project
Alternative community edition of the OSSM
This folder contains everything related to the two PCBs of the OSSM ALT Edition (the main PCB and the brake chopper), organized as follows:
Main components on the Brakechopper v1 1
Brakechopper v1 1 bill of materials (BOM)
43 components, 18 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ESP32-S3 MD7680EC0QA3 | SOT-23-3L_L2.9-W1.6-P1.90-LS2.8-BL | U1 |
| 1 | TPS54331DR CJ431 Changjiang Electronics Tech (CJ) | SOT-23-3_L2.9-W1.6-P1.90-LS2.8-BR | U2 |
| 1 | CYA0630-6.8UH EG2131 | SOP-8_L4.9-W3.9-P1.27-LS6.0-BL | U3 |
| 1 | BC817-25 hongjiacheng | Q_SOT-23 | Q1 |
| 1 | BC817-25 FDS5670-NL-VB Changjiang Electronics Tech (CJ) | SO-8 N-channel mosfet FDS5351 | Q2 |
| 1 | SMF30A Red Hubei KENTO Elec | D_0603 | D1 |
| 1 | H5VL10BC Yellow Foshan NationStar Optoelectronics | D_0603 | D2 |
| 1 | 4.7UF 10uF Murata Electronics | C_0805 | C1 |
| 1 | 1UF 10uF Murata Electronics | C_0805 | C2 |
| 1 | 4.7UF 100nF YAGEO | C_0603 | C3 |
| 3 | 10kΩ UNI-ROYAL(Uniroyal Elec) | R_0603 | R1, R4, R5 |
| 1 | 100kΩ UNI-ROYAL(Uniroyal Elec) | R_0603 | R2 |
| 1 | 4.7kΩ UNI-ROYAL(Uniroyal Elec) | R_0603 | R3 |
| 1 | 120kΩ UNI-ROYAL(Uniroyal Elec) | R_0603 | R6 |
| 1 | 47kΩ UNI-ROYAL(Uniroyal Elec) | R_0603 | R7 |
| 1 | 1MΩ UNI-ROYAL(Uniroyal Elec) | R_0603 | R8 |
| 24 | 4.7Ω | R_1218_3246Metric_Pad1.22x4.75mm_HandSolder | R9, R10, R11, R12, R14, R15, R16, R17 +16 |
| 1 | 10Ω UNI-ROYAL(Uniroyal Elec) | R_0603 | R13 |
Brakechopper v1 1 design files
The KiCad project lives in the jollydodo/OSSM-ALT-Edition repository on GitHub; these links point at the commit this page was built from.
Brakechopper v1 1: common questions
What microcontroller does the Brakechopper v1 1 use?
The Brakechopper v1 1 is built around the ESP32-S3, from the ESP32 family.
How big is the Brakechopper v1 1 PCB?
The Brakechopper v1 1 measures 35 × 23 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Brakechopper v1 1?
43 components, from 18 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 Brakechopper v1 1 design files?
From the jollydodo/OSSM-ALT-Edition 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 Brakechopper v1 1 design in my own project?
It is published under Custom license, which limits how it may be reused; read the license before building on it.
Can I test firmware for the Brakechopper v1 1 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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