KD2 10
About the KD2 10 PCB
KD2 10 is an open source PCB design by Reisi, published on GitHub under the BSD-2-Clause license. It is a 4-layer board measuring 38 × 18 mm, with 51 components from 31 distinct parts.
Other key parts include the BMI160, E104-BT5032A, ZXCT1009F and SE8530X2-HF. By type, the board carries 14 resistors, 12 capacitors, 9 connectors, 5 diodes, 4 ICs and 3 transistors.
From the project
The Helen Project is a firmware platform for bicycle lights. It features
The Helen Project is a firmware platform for bicycle lights. It features
- up to 8 modes, each individually configurable - the modes can be split into groups - support for remote control connected over BLE - mode and group configurations with The Helen App - light-to-light connections with mode synchronization
- Helen, an alternative electronic circuit for the Yinding or KD2 headlight cycling lamps - Drake, a multi-purpose PCB, which can be used to build a rear light or a dropper post actuator
Main components on the KD2 10
KD2 10 bill of materials (BOM)
51 components, 31 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | BMI160 | Bosch_LGA-14_3x2.5mm_P0.5mm | U1 |
| 1 | E104-BT5032A | E104-BT5032A | U2 |
| 1 | ZXCT1009F | SOT-23 | U3 |
| 1 | SE8530X2-HF | SOT-23_MCP1703 | U4 |
| 1 | AO3400A | SOT-23_AO3400A | Q1 |
| 1 | 2N7002 | SOT-23 | Q2 |
| 1 | AO3400A | SOT-23_AO3400A | Q3 |
| 7 | Conn_01x01 | 1,5x3mm_SMD | J1, J2, J4, J5, J6, J7, J8 |
| 1 | Conn_01x06 | PinHeader_1x06_P2.00mm_Vertical | J3 |
| 1 | 4(10)pin_ARM | 4(10)pin_ARM_SWD | J9 |
| 1 | SW_Push | JTP-1138EM | SW1 |
| 1 | SS34 | D_SMA | D1 |
| 1 | BAV99 | SOT-23 | D2 |
| 1 | C72041 LED_BLUE | LED_0603_1608Metric | D3 |
| 1 | C2286 LED_RED | LED_0603_1608Metric | D4 |
| 1 | 5v6 | D_SOT-23_ANK | D5 |
| 2 | C1002 Ferrite_Bead_Small | L_0603_1608Metric | FB1, FB2 |
| 1 | C83456 3µ-18 | SWPA6045S | L1 |
| 6 | 100N 100n | C_0603_1608Metric | C1, C4, C6, C7, C8, C11 |
| 3 | C19666 4µ7/16V | C_0603_1608Metric | C2, C9, C10 |
Show 11 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | 10U/25V 10u/25V | C_0805_2012Metric | C3, C5 |
| 1 | 10u/25V | C_0805_2012Metric | C12 |
| 1 | 1K5 1k5 | R_0603_1608Metric | R1 |
| 2 | 4K7 4k7 | R_0603_1608Metric | R2, R3 |
| 3 | 10 | R_0603_1608Metric | R4, R12, R13 |
| 2 | 47K 47k | R_0603_1608Metric | R5, R10 |
| 2 | 820 | R_0603_1608Metric | R6, R8 |
| 1 | 120 | R_0603_1608Metric | R7 |
| 1 | 1M | R_0603_1608Metric | R9 |
| 1 | 4k7 | R_0603_1608Metric | R11 |
| 1 | 47k | R_0603_1608Metric | R14 |
KD2 10 design files
The KiCad project lives in the Reisi/The_Helen_Project repository on GitHub; these links point at the commit this page was built from.
KD2 10: common questions
How big is the KD2 10 PCB?
The KD2 10 measures 38 × 18 mm, has 4 copper layers and is 0.8 mm thick.
How many components are on the KD2 10?
51 components, from 31 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 KD2 10 design files?
From the Reisi/The_Helen_Project repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the KD2 10 design in my own project?
Yes, under the terms of its BSD-2-Clause license, which Reisi chose for the repository.
