Light bicycle
About the Light bicycle PCB
Light bicycle is an open source PCB design by BrookDawn, published on GitHub. It is a 2-layer board measuring 145.2 × 39.9 mm, with 79 components from 48 distinct parts.
Other key parts include the TP4056-42-ESOP8. By type, the board carries 34 capacitors, 19 resistors, 6 test points, 5 ICs, 5 connectors and 4 diodes.
From the project
存放N32工程项目
基于 Nations N32G430 微控制器 (ARM Cortex-M4) 的嵌入式开发项目，包含固件开发和硬件设计。
从机功能 (modbusslave.c`): - 功能码: 0x01/0x02 (读线圈/离散输入), 0x03/0x04 (读保持/输入寄存器), 0x05/0x06 (写单个线圈/寄存器), 0x0F/0x10 (写多个线圈/寄存器) - 256个保持寄存器, 64个输入寄存器, 64个线圈, 64个离散输入 - USART1 DMA中断通信 - CRC16校验和异常码响应
主机功能 (modbusmaster.c`): - 寄存器轮询读取和写请求队列 - 支持功能码 0x03, 0x06, 0x10 - USART2 DMA通信
全局变量表 (modbusvars.c`): - 预定义变量索引 (系统参数、PID参数、模拟量等) - EEPROM保存支持
Main components on the Light bicycle
Light bicycle bill of materials (BOM)
79 components, 48 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ~ | QFP-48_8.35x8.35_Pitch0.5mm | U1 |
| 1 | ~ | SGM2019 | U2 |
| 1 | ~ | TPS61088RHLR | U3 |
| 1 | TP4056-42-ESOP8 | SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm_ThermalVias | U4 |
| 1 | ~ | MPU6500 | U5 |
| 1 | 8MHZ 8MHz | Crystal_SMD_3.2x2.5mm | Y1 |
| 1 | 32.768KHZ 32.768kHz | Crystal_SMD_3.2x1.5mm | Y2 |
| 1 | USART1 | JST_SMD_1.25mm-3_Locking | J1 |
| 1 | CONN_01X20 电池 | 1x02 | J2 |
| 1 | CONN_01X20 SWD | 1x04 | J3 |
| 1 | CONN_01X04 SWD | 1x04 | J4 |
| 1 | USB_C_Receptacle | USB-C_16 | J5 |
| 3 | SMD_4.2X3.2MM_H2.5MM SMD_4.2x3.2mm_h2.5mm | Push_SMD_4.2x3.2mm | SW1, SW2, SW3 |
| 6 | 0.75mm | TestPoint-0.75mm | TP1, TP2, TP3, TP4, TP5, TP6 |
| 2 | Red | LED_0603_1608Metric_Red | D1, D3 |
| 1 | Blue | LED_0603_1608Metric_Blue | D2 |
| 1 | Green | LED_0603_1608Metric_Red | D4 |
| 1 | 1.5uH | Inductor_7.3x6.6mm | L1 |
| 1 | 4.7UF 4.7uF | C_0603_1608Metric | C1 |
| 5 | 0.1UF 0.1uF | C_0603_1608Metric | C2, C3, C5, C10, C11 |
Show 28 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 4 | 1UF 1uF | C_0603_1608Metric | C4, C12, C13, C16 |
| 2 | 9PF 9pF | C_0603_1608Metric | C6, C7 |
| 2 | 12PF 12pF | C_0603_1608Metric | C8, C9 |
| 2 | 100NF 100nF | C_0603_1608Metric | C14, C15 |
| 3 | 10uF | C_0805_2012Metric | C17, C28, C30 |
| 6 | 100nF | C_0805_2012Metric | C18, C20, C29, C31, C32, C33 |
| 1 | 2.2uF | C_0603_1608Metric | C19 |
| 1 | 47nF | C_0603_1608Metric | C21 |
| 3 | 22uF | C_0805_2012Metric | C22, C23, C24 |
| 1 | 1uF | C_0805_2012Metric | C25 |
| 1 | 3.3nF | C_0603_1608Metric | C26 |
| 1 | 10pF | C_0603_1608Metric | C27 |
| 1 | 10nF | C_0603_1608Metric | C34 |
| 2 | 5.1K 5.1k | R_0603_1608Metric | R1, R6 |
| 1 | 5.1K 0 | R_0603_1608Metric | R2 |
| 1 | 5.1K 100k | R_0603_1608Metric | R3 |
| 1 | 10K 10k | R_0603_1608Metric | R4 |
| 2 | 1k | R_0603_1608Metric | R5, R7 |
| 1 | 220 | R_0603_1608Metric | R8 |
| 1 | 62k | R_0603_1608Metric | R9 |
| 1 | 1.5k | R_0603_1608Metric | R10 |
| 1 | 4.7k | R_0603_1608Metric | R11 |
| 1 | 100k | R_0603_1608Metric | R12 |
| 1 | 269k | R_0603_1608Metric | R13 |
| 1 | 0.2R | R_1206_3216Metric | R14 |
| 2 | 2k | R_0603_1608Metric | R15, R17 |
| 1 | 10k | R_0603_1608Metric | R16 |
| 2 | 5.1k | R_0603_1608Metric | R18, R19 |
Light bicycle design files
The KiCad project lives in the BrookDawn/N32_Project repository on GitHub; these links point at the commit this page was built from.
Light bicycle: common questions
How big is the Light bicycle PCB?
The Light bicycle measures 145.2 × 39.9 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Light bicycle?
79 components, from 48 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 Light bicycle design files?
From the BrookDawn/N32_Project 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 Light bicycle design in my own project?
The repository has no license, so all rights stay with BrookDawn. Use it as a reference, and ask the author before reusing the design.
