2 layers247.7 × 95.3 mmLk56hs pcblambdakb/keyboard-lk56hsLK56HS 55% Staggered Keyboard152 parts1CERN-OHL-S-2.0
2 layers76.2 × 76.2 mmLk16c pcblambdakb/keyboard-lk16cLK16C 4x4 Daisy-Chainable Keyboard PCB53 parts1CERN-OHL-S-2.0
2 layers62 × 84 mmLt7dk pcblambdakb/trackball-lt7dkLT7DK PMW3360 Trackball Development Kit54 parts2CERN-OHL-S-2.0