2 layers80 × 90 mm

WiFi Septic Controller
mikelawrence/WiFi-Septic-Controller
WiFi enabled Septic Controller
104 parts8MIT
Boards in 1 GitHub repository, designed in KiCad, that use the MID400 by onsemi (-40℃~+85℃ 1 1.5V 115mW 150uA 1ms 1ms 2.5kV 20mA 4.5V~5.5V DIP-8 Logic Output Optoisolators ROHS). See how each wires it, with its parts, size, README and files; the MID400’s symbol, footprint and pinout are on its own page.

mikelawrence/WiFi-Septic-Controller
WiFi enabled Septic Controller