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  • led grid 8×8 / 16×8 / 32×8 LED matrix sandbox. MAX7219 byte framing preview.
  • gamepad tester live USB HID gamepad state, any button count, raw Gamepad API dump.
  • waveloop pedal unified diagnostic for the combined pedal: HID buttons, MAX7219 matrix, TM1637 4-digit display, NeoPixel.
  • controlbaeXY 5 buttons + 3-state slider + 2 pots, USB MIDI controller. CC mappings + LED matrix viz.
  • footjob v1 foot pedal: 3 gameplay buttons × 4 pages, single page-button (tap=advance, hold=shift).
  • footjob v2 · MIDI foot pedal as USB MIDI device: 2 buttons × 4 pages × 2 layers → notes 60–75. SHIFT and PAGE dedicated.
  • handoff.json spec for the serial ↔ MAX7219 bridge. drop the URL into sibling agents.
static prototyping scratchpad · brototype.lucianlabs.ca · source on gitlab