Re: [EE] Measuring increasing mass over a 1/2 day period

Chuck Olson <[email protected]> Fri, 13 Mar 2026 09:08:29 -0500
Newsgroups gmane.comp.hardware.microcontrollers.pic
Message-ID <CAOf6MawHK2NXQS8zza52pn-cq=rhDyYAr1G=M5wjeWYGPNb2xw@mail.gmail.com>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