Re: [EE] measuring the magnetic field from a small trace carrying a < 50uA load?

Do you have an old busted cassette recorder ?  Maybe the playback head
could be used to sense the field ?

On Thu, Jan 2, 2025 at 7:05 PM Jason White
<[email protected]> wrote:
>
> When developing battery powered devices, sometimes it can be difficult to
> track down where the last few dozen microamps of load are being drawn.
>
> One can resort to systematically cutting traces and desoldering components.
> But that is destructive, labor intensive, and error prone.
>
> I would like to know if an active probe exists that can measure and
> discriminate the current/DC magnetic field of small < 50uA loads on small
> but loosely packed PCB traces.
>
> Are there other viable (hopefully nondestructive) ways to track down small
> loads? (A low noise thermal camera in a vacuum chamber?)
>
> --
> Jason White
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