This is a fully functional 75% mechanical keyboard and custom ball-style mouse, built entirely from scratch using PVC pipes, recycled hardware, and a Raspberry Pi Pico running KMK. It supports layers, macros, mouse emulation, a physical scroll wheel, and multimedia controls. The custom mouse is inspired by Pimoroni's ball mouse, utilizing the sensor from an old mouse and a homemade housing.
outputaaa.mp4
Watch the full demonstration video to see the keyboard and mouse in action.
- 75% mechanical layout with full key support
- Layered keymaps (Default, Media, Macro, Utility)
- Multimedia and system controls:
- Volume up/down, mute
- Brightness control
- Play/Pause
- Physical scroll wheel:
- Scroll through documents or pages
- Adjust brightness or volume on specific layers
- Mouse emulation using keyboard:
- Cursor movement via Arrow keys or Vim-style (H, J, K, L)
- Left and right click support
- Macro recording and playback:
- Capture and repeat sequences of keystrokes
- Based on a Pimoroni-style ball mouse
- Uses the optical sensor and components from a repurposed classic mouse
- Mounted in a PVC or 3D printed housing
- Physical trackball for smooth cursor control
- Integrated buttons for left/right click
mouse.mp4
mouse.mp4
scroll.mp4
video2_fixed.mp4
- PVC pipe frame
- Raspberry Pi Pico
- Mechanical switches
- Keycaps
- Diodes (1N4148)
- Rotary encoder (for scroll wheel)
- Wires, solder, and prototype board
- KMK firmware running on CircuitPython
- Optical sensor and board from an old USB mouse
- Trackball (recycled from ball roller)
- PVC or 3D printed shell
- Tactile switches for buttons
- Connected via USB or directly to Pico