There is one other side to this, which has yet to be mentioned. If you need to run a Pi from a higher voltage DC source, e.g. in a 12/24/48V automotive or telecom environment, you can do that with a DC-to-DC power supply. The important things are not to exceed the max input voltage on the Pi, provide a steady voltage that's reasonably free of noise and above minimum, and provide sufficient power at that voltage. With an in-spec supply, the Pi will draw as much current as it needs, and the current limit of the supply is just a limit which needs to be ≥ the Pi's demand for power. Also, don't exceed the nominal 3.3V on GPIO pins (there's some margin there, not sure exactly, but 5V on GPIO is not recommended).
If you have a known range of input voltage, you can build your own DC voltage regulator circuit for this reasonably cheaply. Just don't get it wrong. The tiny board and low component count of a Pi is not intended to be robust against a bad supply.
If you have a known range of input voltage, you can build your own DC voltage regulator circuit for this reasonably cheaply. Just don't get it wrong. The tiny board and low component count of a Pi is not intended to be robust against a bad supply.
Statistics: Posted by Murph9000 — Fri Aug 30, 2024 5:19 pm