I have an RPI 3B+ that keeps giving me a notice of low power voltage. I'm using an 'approved' power supply that is supposed to be well regulated. There is nothing attached to the PI. I want to use it as a remote display of Magic Mirror.
Would it be possible to tie the 5v input line to one of the ADC pins and read the voltage in a script? Would I need a current limiting resistor inline, if so how big? Or, is there something else I would need to protect the PI from itself?
TIA, Ron R
Would it be possible to tie the 5v input line to one of the ADC pins and read the voltage in a script? Would I need a current limiting resistor inline, if so how big? Or, is there something else I would need to protect the PI from itself?
TIA, Ron R
Statistics: Posted by Ron R — Sat Nov 22, 2025 10:57 am