Re: Power supplies and reliability

On 6/3/26 19:12, Eben King wrote:
> 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.

https://www.tek.com/en/products/oscilloscopes/dpo70000sx


David