I recreated the original DSO138 project basis — not the DSO138 Mini — with the main ICs, regulators, BNC/USB input, crystal, power rails, and the full readable resistor/capacitor/inductor set from the original DSO138 schematic.

I also wired the core power, STM32 clock/USB/reset/boot, decoupling, and a simplified analog input path, but I’m not declaring it complete: ERC still reports many floating pins because the source PDF extraction does not reliably expose every switch/header/LCD/control connection, and C23 was partially unreadable. To finish this accurately, upload or link the original DSO138 non-Mini schematic/parts list with readable nets, and I’ll complete the exact wiring and clear ERC.

Will a PDF file work?

Yes — a PDF will work, as long as it’s the original DSO138 schematic / parts list, not the DSO138 Mini.

Best upload:

Once you upload it, I’ll extract the exact nets, complete the schematic wiring, and re-run ERC.