BigButton

One-button USB HID keyboard

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.

License

This project publiced according to WTFPL.

Hardware

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.

####Box

####Yellow Cover

####Arduino Beetle

####Lines

• Micro-USB Cable
• Dupont Line

Construction

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

Program

Currentlly, the program support 6 modes:

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