---- START NEW MESSAGE ---
Received: from cherry.ease.lsoft.com [209.119.0.109] by dpmail10.doteasy.com with ESMTP
  (SMTPD32-8.05) id A3A8A26A008E; Sun, 01 Feb 2004 17:11:04 -0800
Received: from PEAR.EASE.LSOFT.COM (209.119.0.19) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <3.00CC844D@cherry.ease.lsoft.com>; 1 Feb 2004 20:11:00 -0500
Received: from MITVMA.MIT.EDU by MITVMA.MIT.EDU (LISTSERV-TCP/IP release 1.8e)
          with spool id 6306 for PICLIST@MITVMA.MIT.EDU; Sun, 1 Feb 2004
          20:10:54 -0500
Received: from MITVMA (NJE origin SMTP@MITVMA) by MITVMA.MIT.EDU (LMail
          V1.2d/1.8d) with BSMTP id 8860; Sun, 1 Feb 2004 20:09:07 -0500
Received: from linda-2.paradise.net.nz [202.0.58.21] by mitvma.mit.edu (IBM VM
          SMTP Level 430) via TCP with ESMTP ; Sun, 01 Feb 2004 20:09:07 EST
X-Comment: mitvma.mit.edu: Mail was sent by linda-2.paradise.net.nz
Received: from smtp-1.paradise.net.nz (smtp-1a.paradise.net.nz [202.0.32.194])
          by linda-2.paradise.net.nz (Paradise.net.nz) with ESMTP id
          <0HSF00IC3N77LR@linda-2.paradise.net.nz> for PICLIST@MITVMA.MIT.EDU;
          Mon, 02 Feb 2004 14:09:08 +1300 (NZDT)
Received: from Paradise (202-0-44-34.adsl.paradise.net.nz [202.0.44.34]) by
          smtp-1.paradise.net.nz (Postfix) with SMTP   id 795818277C; Mon, 02
          Feb 2004 14:09:07 +1300 (NZDT)
MIME-version: 1.0
X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1165
X-Mailer: Microsoft Outlook Express 6.00.2800.1158
Content-type: text/plain; charset=iso-8859-1
Content-transfer-encoding: 7bit
X-Priority: 3
X-MSMail-priority: Normal
References: <31e31531d6d9.31d6d931e315@optonline.net>
            <401D7162.5060006@certa.org>
Message-ID:  <01a301c3e929$43bd0d60$7b01a8c0@Paradise>
Date:         Mon, 2 Feb 2004 14:09:50 +1300
Reply-To:     pic microcontroller discussion list <PICLIST@MITVMA.MIT.EDU>
Sender:       pic microcontroller discussion list <PICLIST@MITVMA.MIT.EDU>
From:         Russell McMahon <apptech@PARADISE.NET.NZ>
Subject: [EE:] [AR] Altimeter
Comments: To: AROCKET <arocket@exrocketry.net>
To:           PICLIST@MITVMA.MIT.EDU
Precedence: list
X-RCPT-TO: <mailinglist2@FARCITE.NET>
Status: U
X-UIDL: 371856792

> Does anyone know where I can get directions to build an altimeter?

Googling on

        altimeter build pressure

produces many references.

Almost all amateur rocketry altimeters are simply a suitable commercial
pressure sensor and a means of reading it.
Linearisation and temperature compensation may be desirable depending on the
sensor.

___________________

Cheap altimeter intended for model rocketry use.

    http://www.birch.net/~petek/rockets/altimeter/

    Circuit     http://www.birch.net/~petek/rockets/altimeter/circuit2.html

    Useful page on basic principals

            http://www.birch.net/~petek/rockets/altimeter/begin.html


Simple homebrew recording altimeter
Very simple basic cct feeds a microcontroller
Uses MPX2100A

        http://www.nhrc.homestead.com/files/ROCALT1a.doc


Discussion about some commercial altimeters designed for rocketry use
Worth a read.

        http://www.jcrocket.com/altimeters.shtml


Precision Digital Altimeter
Uses Motorola MPXS 4100 A
Looks good. Complexish

    http://www.electronic-engineering.ch/microchip/projects/alti/alti.html




        Russell McMahon

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

.