4 layers25 × 25 mm

MiniOSCI
RoseDaggerDev/MiniOscilloscope
Through-Hole Version: Its been fully tested and works like a charm. Its got a BOM of 87 components and fits on a 50x50mm 2-layer board, manufactured by PCBWay.
80 parts1MIT
Boards in 1 GitHub repository, designed in KiCad, that use the MIC4428YM by Microchip Technology (-40℃~+150℃ 1.5A 1.5A 18ns 2 20ns 4.5V~18V 400uA Low Side MOSFET SOIC-8 Gate Drivers ROHS). See how each wires it, with its parts, size, README and files; the MIC4428YM’s symbol, footprint and pinout are on its own page.

RoseDaggerDev/MiniOscilloscope
Through-Hole Version: Its been fully tested and works like a charm. Its got a BOM of 87 components and fits on a 50x50mm 2-layer board, manufactured by PCBWay.