If you are looking for technical guides or a blog-style walkthrough of the schematic, these sources are highly recommended:
When working with the YD-RP2040 schematic, keep these unique hardware features in mind: ydrp2040 schematic
On the YDRP2040 schematic, you will likely find a (e.g., RT6150 or similar) stepping down 5V (from USB) to 3.3V. That 3.3V then feeds an internal regulator inside the RP2040 to generate the 1.1V rail. Pro tip: Check for ferrite beads and large decoupling capacitors (10µF + 100nF) near the power pins. If you are looking for technical guides or