2 layers

Wiggle spine
gitter-badger/wiggleport
Modular I/O for multi-channel sound, light, and motion
173 partsMIT
Boards in 3 GitHub repositories, designed in KiCad, that use the SN75176BD by Texas Instruments (0℃~+70℃ 1 1 4.75V~5.25V Transceiver SOIC-8 RS-485 / RS-422 ICs ROHS). See how each wires it, with its parts, size, README and files; the SN75176BD’s symbol, footprint and pinout are on its own page.

gitter-badger/wiggleport
Modular I/O for multi-channel sound, light, and motion

