From: Paulo Marques <pmarques@grupopie.com>
To: Jan Engelhardt <jengelh@linux01.gwdg.de>
Cc: Lee Revell <rlrevell@joe-job.com>,
abonilla@linuxwireless.org, linux-kernel@vger.kernel.org,
hdaps devel <hdaps-devel@lists.sourceforge.net>,
"'Yani Ioannou'" <yani.ioannou@gmail.com>,
Dave Hansen <dave@sr71.net>
Subject: Re: IBM HDAPS, I need a tip.
Date: Mon, 01 Aug 2005 13:18:44 +0100 [thread overview]
Message-ID: <42EE1324.10304@grupopie.com> (raw)
In-Reply-To: <Pine.LNX.4.61.0508010844380.6353@yvahk01.tjqt.qr>
Jan Engelhardt wrote:
>>So in order to calibrate it you need a readily available source of
>>constant acceleration, preferably with a known value.
>>
>>Hint: -9.8 m/sec^2.
>
> Drop it out of the window? :)
No, no. Constant gravity (like having the laptop sitting on the desk)
"feels like" constant acceleration.
Dropping it out of the window should measure 0 m/sec^2, because the
accelerometer is not working on an inertial referential (I hope this is
the correct term in english...). For the accelerometer, this is just
like the feeling of free falling inside an elevator: no gravity :)
--
Paulo Marques - www.grupopie.com
It is a mistake to think you can solve any major problems
just with potatoes.
Douglas Adams
next prev parent reply other threads:[~2005-08-01 12:21 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-08-01 1:53 IBM HDAPS, I need a tip Alejandro Bonilla Beeche
2005-08-01 4:56 ` Alejandro Bonilla Beeche
2005-08-01 5:10 ` Lee Revell
2005-08-01 6:51 ` Jan Engelhardt
2005-08-01 8:07 ` Yani Ioannou
2005-08-01 13:38 ` Dave Hansen
2005-08-01 19:02 ` Yani Ioannou
2005-08-01 12:18 ` Paulo Marques [this message]
2005-08-01 12:55 ` linux-os (Dick Johnson)
2005-08-01 13:09 ` Vojtech Pavlik
2005-08-01 14:22 ` linux-os (Dick Johnson)
2005-08-01 14:51 ` Vojtech Pavlik
2005-08-01 18:08 ` [Hdaps-devel] " Jon Escombe
2005-08-01 18:25 ` Alejandro Bonilla
2005-08-01 19:44 ` Jon Escombe
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=42EE1324.10304@grupopie.com \
--to=pmarques@grupopie.com \
--cc=abonilla@linuxwireless.org \
--cc=dave@sr71.net \
--cc=hdaps-devel@lists.sourceforge.net \
--cc=jengelh@linux01.gwdg.de \
--cc=linux-kernel@vger.kernel.org \
--cc=rlrevell@joe-job.com \
--cc=yani.ioannou@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox