Re: Power supplies and reliability

On 6/3/26 10:36, Stefan Monnier wrote:
>> They are also going to be polled, and will return the voltage they find
>> at polling time. What they won't tell you is what various ripple
>> voltages are, both the initial rectified mains at 100/120Hz and the
>> residual switching frequencies of the various step-down regulators.
> 
> Yeah, I think we'd need a kind of sensor that doesn't give just the
> current voltage but gives a bracket of the lowest & highest voltage seen
> since the last measurement, or one that can trigger an interrupt if the
> voltage ever goes outside of a given range.

I want something that does a Fourier transform of the voltage data so I 
can see if there's ripple at any particular frequency. A live waterfall 
plot would be wonderful.