If you don't want measurable voltage drop, buy a high quality lab power supply and connect thick copper or silver wires between the power pins on the 40-pin header. Rated 16A or more for mains AC cables thicker than the GPIO pins themselves and not longer than 10cm should do it. Or calculate yourself. Or sell your RPI5 and buy a computer that has an onboard step-down converter so it can be fed with some higher voltage 9-20V. There are no circuit schematics available for the RPi5, so it is guessing what components cause voltage drop or maybe dirt in/on connectors. Also there is firmware that does things that cannot be seen what it would or can do.
Statistics: Posted by redvli — Thu Nov 27, 2025 10:33 am