4 layers57 × 33 mm

Sensor pcb
nichlock/open-linear-scale
Open-source capacitive linear encoder / DIY DRO scale: KiCad PCBs, STM32 firmware, and test data. Same principle as digital calipers.
69 parts73
Boards in 1 GitHub repository, designed in KiCad, that use the JR200 by Knowles (-40℃~+85℃ 1.15mm 125V 1500@1MHz 4.5pF~20pF SMD Trimmers, Variable Capacitors ROHS). See how each wires it, with its parts, size, README and files; the JR200’s symbol, footprint and pinout are on its own page.

nichlock/open-linear-scale
Open-source capacitive linear encoder / DIY DRO scale: KiCad PCBs, STM32 firmware, and test data. Same principle as digital calipers.