One-button USB HID keyboard
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One-button USB HID keyboard Finished BigButton

User Manual

  1. Start computer and open a plain text editor notepadon Windows
  2. Press and hold the button, then connect the USB cable
  3. Follow the instruction to select a mode
  4. Disconnect the cable
  5. Connect the cable again with button released
  6. Be happy by pressing the button

This project is influenced by pictures on WeChat, when I want to buy one from the original creator, it became unavailable. So, I selected parts on taobao and build one by myself.


This project publiced according to WTFPL. DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE


All button & box parts were found from taobao. Total cost (my version @ 20150521) RMB98.88.

####The button LA38-11

I picked this since I like the arrows on top. It's an auto-lock button, I removed the locker.




####Yellow Cover


####Arduino Beetle

Arduino Beetle


  • Micro-USB Cable
  • Dupont Line


There are many references on project vim-pedal.

Connect the button

  • When its status is released, connect D9 to LOW
  • When its status is pressed, connect D9 to HIGH


Then, connect the usb cable



Currentlly, the program support 6 modes:

    1. Default mode: Enter.
    1. Emergency STOP 1: ESC.
    1. Emergency STOP 2: Ctrl-C.
    1. Emergency STOP 3: ESC, Enter.
    1. Emergency STOP 4: ESC, tab, Enter.
    1. Emergency STOP 5: Ctrl-C, Y, Enter.
    1. Emergency Shutdown Windows: run "shutdown -s -f -t 0".
    1. Next Window: Alt-Tab.
    1. Next App (OSX): Cmd-Tab.
    1. Next Tab (Byobu): F3.
    1. BSOD.
    • You need set HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\kbdhid\Parameters\CrashOnCtrlScroll to 1