2 layers50 × 100 mm

ActiveLoad
ahessling/ActiveLoad
Small 12 Watt Active Load (dummy load) with STM32 microcontroller
83 parts5MIT
Boards in 1 GitHub repository, designed in KiCad, that use the ESP4020 by ECE (-40℃~+85℃ 10mm 2.5mm 6.5mm PC Pin Rectangular Columnar SPDT Through Hole White 插件 Slide Switches ROHS). See how each wires it, with its parts, size, README and files; the ESP4020’s symbol, footprint and pinout are on its own page.

ahessling/ActiveLoad
Small 12 Watt Active Load (dummy load) with STM32 microcontroller