[PLUG-TALK] Fluke 87 multimeter
denis.heidtmann at gmail.com
Mon May 23 14:55:41 PDT 2011
On Mon, May 23, 2011 at 12:07 PM, Aaron Burt <aaron at bavariati.org> wrote:
> On Fri, May 20, 2011 at 05:51:29PM -0700, Denis Heidtmann wrote:
> > 2) I see that this meter has what I judge to be a very clever
> > drive to the LCD can be sent to the speaker so that the readings can be
> > decoded and recorded.
> That looks like a cool project. I would use a TeensyDuino instead of a
> 68HC705, since they can act as USB devices, and are super-easy to program
> under Linux. (And also because I already have a handful of Teensys, and
> could easily get more tonight at the DorkBot meeting.)
> I'd probably also put an optisolator on the output of of the speaker, to
> keep the Magic Smoke inside my PC.
I do not understand. Are not sound waves isolation enough?
> Speaking of multimeter hacks, it turns out that many "no-name" multimeters
> all use the same chip, which supports serial output:
Now that is a still more practical idea. Both (Fluke's audio output and the
taping into a feature that the manufacturer chose to hide) ideas have strong
hack appeal. A manufacturer hiding an exploitable feature rankles.
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