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2 layers16 × 25 mmPower button, the printed circuit board in 3D

Power button

explora26/tablet_sensor_board
Open in PCBKitView on GitHub.kicad_pcb
Size
16 × 25 mm
Copper layers
2
Thickness
1.6 mm
Parts
4
Nets
5
Pads
12
Tracks, vias
14, 12
Pours
2
Routed
Yes
KiCad
KiCad 10.0 (file 20260206)
Created
17 Oct 2026
Updated
19 Oct 2026

Overview

Power button is an open-source printed circuit board by explora26, from the explora26/tablet_sensor_board repository on GitHub. It is a 2-layer board of 16 × 25 mm with 4 parts on 5 nets, routed with 14 tracks and 12 vias.

It is built around the K6-6277D-02A. Its parts include 1 resistor, 1 connector and 1 switch.

Main components

1

README

power_button/README.md

平板電源鍵小板

KRHRO K6-6277D-02 直角 LED 輕觸開關（紅光）、LED 限流電阻、JST PH 2.0 4P 接頭和一個 M3 鎖孔。

狀態：原理圖、layout、3D 模型完成（16 × 25 mm，雙層板）；KiCad 10 ERC / DRC 無錯誤。

J1（JST PH 2.0，4P）

J1訊號說明
1VCC5V，LED 電源（經 R1 1k 到 LED 正極）
2SW按下時接到 GND；上拉電阻放在主板
3LED_CTRLLED 負極；主板拉到 GND 時 LED 亮
4GND
  • LED 電流：(5V − 紅光約 2V) / 1k ≈ 3 mA
  • LED_CTRL 會被 LED 拉到接近 5V − Vf，不可直接接 3V GPIO；主板請用 NPN / N-MOSFET 或開汲極輸出控制，要常亮就直接接 GND
  • 開關額定 DC 30V 0.3A

機構重點

  • 按鍵中心離板面 3.80 mm，按鍵帽 Ø8.30 × 2.50 mm，帽子底部比板面低 0.35 mm，所以按鍵帽必須伸出板邊
  • 板子下緣在第 4 腳往前 4.58 mm（本體前緣附近），頸部和按鍵帽伸出板外；按鍵帽後緣在第 4 腳往前 6.7 mm、帽面 9.2 mm
  • 本體外框：寬 7.6 mm，第 4 腳往後 4.05 mm 到往前 4.7 mm，高 7.4 mm
  • H1：M3 鎖孔（3.2 mm，不鍍銅）
  • 3d/power_button_board.step：整片板子含零件的 STEP，可直接匯入機構軟體
  • 3d/KRHRO_K6-6277D.step：開關的簡化模型（依 KRHRO 圖面尺寸建立，外形包絡正確，內部細節省略）

檔案

  • power_button.kicad_pro / .kicad_sch / .kicad_pcb：KiCad 專案；fp-lib-table 指到專案內的 power_button.pretty
  • power_button.pretty/KRHRO_K6-6277D.kicad_mod：開關封裝（依圖面 PCB Layout 繪製，已掛 3D 模型）
  • fab/power_button_gerbers.zip、fab/positions.csv、fab/bom.csv：製造檔
  • docs/schematic.pdf、docs/pcb_3d_top.png、docs/pcb_3d_iso.png
  • scripts/gen_sch.py、scripts/gen_pcb.py、scripts/gen_3d.py：產生原理圖、PCB（Freerouting 佈線）和 3D 模型的腳本

Parts

4
QtyValueFootprintReferences
11kResistor_SMD:R_0603_1608MetricR1
1K6-6277D-02power_button:KRHRO_K6-6277DSW1
1M3MountingHole:MountingHole_3.2mm_M3H1
1PWR_KEYConnector_JST:JST_PH_B4B-PH-K_1x04_P2.00mm_VerticalJ1

Questions

How big is the Power button PCB?

It measures 16 × 25 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Power button use?

4 parts, built around the K6-6277D-02A. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the Power button KiCad files?

From the explora26/tablet_sensor_board repository on GitHub, at the commit this page was made from: the board is power_button/power_button.kicad_pcb and its schematic lis3dh_board.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Power button design in my own project?

Its repository states no licence, so its author keeps all rights: ask explora26 before reusing the design.

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