Truncated match.
PICList
Thread
'PICs in model rocketry'
1997\03\09@161659
by
Matt Calder
Does anyone know of designs for a PIC
based altimeter for use in model rocketry?
/*****************************************/
/* Matt Calder, Dept. of Statistics, CSU */
/* http://www.stat.colostate.edu/~calder */
/*****************************************/
1997\03\09@194555
by
crbres
Matt Calder wrote:
>
> Does anyone know of designs for a PIC
> based altimeter for use in model rocketry?
>
> /*****************************************/
> /* Matt Calder, Dept. of Statistics, CSU */
> /* http://www.stat.colostate.edu/~calder */
> /*****************************************/
Matt,
Not exactly what you are looking for, but I remember a model rocketry
altimeter project in Radio Electronics or its latest incarnation Electronics
Now. I think it was around '90 or '91. I think the code was for a Motorola
micro, but porting it over to a PIC is always an option.
Ken Pergola
1997\03\10@022513
by
Tim Kerby
If you find a whole project - tell me please!
I have beem looking for something like this for ages. A pic could also
handle burn temp, velocity, G Force, and a load of other stuff too.
Thanks
Tim
At 14:15 09/03/97 -0700, you wrote:
{Quote hidden}>
> Does anyone know of designs for a PIC
>based altimeter for use in model rocketry?
>
>/*****************************************/
>/* Matt Calder, Dept. of Statistics, CSU */
>/*
http://www.stat.colostate.edu/~calder */
>/*****************************************/
>
------------------------------------------------------------------
Personal Web Pages: http://web.ukonline.co.uk/members/tim.kerby/
PIC Site: web.ukonline.co.uk/members/tim.kerby/pic/
The PIC Pages are under construction and I am looking for projects
------------------------------------------------------------------
1997\03\10@031858
by
John Dammeyer
|
At 07:46 PM 09/03/1997 -0800, you wrote:
>Matt Calder wrote:
>>
>> Does anyone know of designs for a PIC
>> based altimeter for use in model rocketry?
>>
>> /*****************************************/
>> /* Matt Calder, Dept. of Statistics, CSU */
>> /* http://www.stat.colostate.edu/~calder */
>> /*****************************************/
>
>
>Matt,
>
>Not exactly what you are looking for, but I remember a model rocketry
>altimeter project in Radio Electronics or its latest incarnation Electronics
>Now. I think it was around '90 or '91. I think the code was for a Motorola
>micro, but porting it over to a PIC is always an option.
>
It was around then. Called a pocket Altimeter and used a Motorola Pressure
sensor. They also had a really nice water column method of calibrating the
sensor. Alas the magazine developed paws and wandered off perhaps to be
captured by another magazine lover.
John
Pioneers are the ones, face down in the mud,
with arrows in their backs.
Automation Artisans Inc. Ph. 1-250-544-4950
PO Box 20002 Fax 1-250-544-4954
Sidney, BC CANADA V8L 5C9
1997\03\10@101145
by
Craig Bladow
|
Matt Calder wrote:
>
> Does anyone know of designs for a PIC
> based altimeter for use in model rocketry?
>
> /*****************************************/
> /* Matt Calder, Dept. of Statistics, CSU */
> /* http://www.stat.colostate.edu/~calder */
> /*****************************************/
Matt,
Try the Sunsite Archive at:
http://sunsite.unc.edu/pub/archives/rec.models.rockets/ELECTRONICS/
Look at the files altimet.zip and altigif.zip both are
based on the PIC based Basic Stamp.
I am working on a PIC based model rocket altimeter design.
I plan to use an absolute pressure sensor salvaged from a weather
balloon electronics package and log the flight data into a serial
eeprom.
I would appreciate any information anyone might have on using the
pressure sensors found on the Radiosonde weather balloon circuit
boards, they are in a metal can - 8 lead package with the following
marking: SDC 909-4502803 07
Craig Bladow
/******************************************************/
/* Craig Bladow - Embedded Systems Project Engineer */
/* Dana Corporation - Ottawa Lake Michigan */
/* spam_OUTcraigbTakeThisOuT
compuserve.com */
/* http://ourworld.compuserve.com/homepages/craigb */
/******************************************************/
1997\03\10@113635
by
Andy Kunz
At 02:15 PM 3/9/97 -0700, you wrote:
>
> Does anyone know of designs for a PIC
>based altimeter for use in model rocketry?
>
>/*****************************************/
>/* Matt Calder, Dept. of Statistics, CSU */
>/* http://www.stat.colostate.edu/~calder */
>/*****************************************/
Matt,
I did an altimeter using a PIC and a Motorola absolute pressure sensor.
Andy
==================================================================
Andy Kunz - Montana Design - 409 S 6th St - Phillipsburg, NJ 08865
Hardware & Software for Industry & R/C Hobbies
"Go fast, turn right, and keep the wet side down!"
==================================================================
1997\03\10@133259
by
Tim Kerby
|
Hi
How did you get hold of a radiosonde. If you found it you are supposed to
return them!
Tim
At 09:53 10/03/97 -0500, you wrote:
{Quote hidden}>
> I would appreciate any information anyone might have on using the
> pressure sensors found on the Radiosonde weather balloon circuit
> boards, they are in a metal can - 8 lead package with the following
> marking: SDC 909-4502803 07
>
> Craig Bladow
>
> /******************************************************/
> /* Craig Bladow - Embedded Systems Project Engineer */
> /* Dana Corporation - Ottawa Lake Michigan */
> /*
.....craigbKILLspam
@spam@compuserve.com */
> /*
http://ourworld.compuserve.com/homepages/craigb */
> /******************************************************/
>
------------------------------------------------------------------
Personal Web Pages: http://web.ukonline.co.uk/members/tim.kerby/
PIC Site: web.ukonline.co.uk/members/tim.kerby/pic/
The PIC Pages are under construction and I am looking for projects
------------------------------------------------------------------
1997\03\10@141242
by
techccs
|
Tim Kerby wrote:
{Quote hidden}>
> Hi
> How did you get hold of a radiosonde. If you found it you are supposed to
> return them!
>
> Tim
>
> At 09:53 10/03/97 -0500, you wrote:
>
> >
> > I would appreciate any information anyone might have on using the
> > pressure sensors found on the Radiosonde weather balloon circuit
> > boards, they are in a metal can - 8 lead package with the following
> > marking: SDC 909-4502803 07
> >
> > Craig Bladow
> >
> > /******************************************************/
> > /* Craig Bladow - Embedded Systems Project Engineer */
> > /* Dana Corporation - Ottawa Lake Michigan */
> > /*
craigb
KILLspamcompuserve.com */
> > /*
http://ourworld.compuserve.com/homepages/craigb */
> > /******************************************************/
> >
>
> ------------------------------------------------------------------
> Personal Web Pages:
http://web.ukonline.co.uk/members/tim.kerby/
> PIC Site: web.ukonline.co.uk/members/tim.kerby/pic/
> The PIC Pages are under construction and I am looking for projects
> ------------------------------------------------------------------
Tim,
These devices can be purchased from Electronics Goldmine.
Brian
--
==================================
= New Ideas come from those who =
= didn't know it wasn't possible =
==================================
1997\03\10@155400
by
Octavio Nogueira
> Matt,
>
> Not exactly what you are looking for, but I remember a model rocketry
> altimeter project in Radio Electronics or its latest incarnation
Electronics
> Now. I think it was around '90 or '91. I think the code was for a
Motorola
> micro, but porting it over to a PIC is always an option.
>
> Ken Pergola
It's on Radio Eletronics, october 1990 and I have this issue, if anyone
need it
I can scan and send.
Octavio
========================================================
Octavio Nogueira
e-mail: .....nogueiraKILLspam
.....mandic.com.br
homepage: www.geocities.com/SiliconValley/Pines/6902/index.html
voice/fax: +55 11 240-6474
"ProPic" The first Production PIC Programmer running in
Windows and under US$ 20.00.
========================================================
1997\03\10@170854
by
Philip Restuccia
> > Matt,
> >
> > Not exactly what you are looking for, but I remember a model rocketry
> > altimeter project in Radio Electronics or its latest incarnation
> Electronics
> > Now. I think it was around '90 or '91. I think the code was for a
> Motorola
> > micro, but porting it over to a PIC is always an option.
> >
> > Ken Pergola
>
> It's on Radio Eletronics, october 1990 and I have this issue, if anyone
> need it
> I can scan and send.
>
> Octavio
>
Octavio:
If you do this, I'm pretty sure you will be violating the magazine's copyrights.
I believe they prohibit any duplication of their articles in any form without
express
written permission of the publishers. You'd best check first.
Philip Restuccia
EraseMEphilip.restucciaspam_OUT
TakeThisOuTperi.com
1997\03\11@071738
by
Kalle Pihlajasaari
|
Hi Tim,
> How did you get hold of a radiosonde. If you found it you are supposed to
> return them!
You can buy, beg or find them quite legitemately. Those found have
no real value besides possibly the location they were found at and if you
actually find the specific site that launched the sonde they will be
interested in the location and the time you found it, possibly serial number
but they may not keep records of them.
These devices are sold for about US$ 50 and are single use. I have a
few in my collection (4 types) and none of them actually indicate they
might be wanted back. The one that Electronics Goldmine sells Which has
SDC Presure sensor has on the printed box the statement :
"This instrument can be safely discarded into any trash receptacle"
Also other statements to the effect that it wont explode &c.
There are other makes that are available but no others that I know
of on the surplus market.
> > I would appreciate any information anyone might have on using the
> > pressure sensors found on the Radiosonde weather balloon circuit
> > boards, they are in a metal can - 8 lead package with the following
> > marking: SDC 909-4502803 07
It will be a silicon resistive strain bridge measuring absolute pressure
(rear side of diaphragm at vacuume) and one would be best served by
tracing the circuit of the sonde to find out how it is used. The
circuit first generates a voltage from the pressure transducer and then
selects one of 6 voltages (pressure, temp, humidity, ?, HIref, LOref)
and feeds it into a V-to-F converter which is then used to modulate
the radio section which is almost so simple that it does not look like
it can be a transmitter (one transistor and a Teflon spaced tuner
capacitor with a 1/4 wave groundplane antenna).
Problems with the sensors and the circuit in the sondes is that they
are not made for long term stability and are reference callibreated
on the ground at the time of launch. For Rocket use this should not
be much of a problem but for long term climate studies I would
hesitate to trust the stability without carefull characterisation.
Interfacing to a Stamp or PIC might be possible to do with just one
arm of the bridge in resitive mode for Rocket applications as the
time is so short there will not be much temperature drift. Otherwise
you will need to put in a bridge amplifier and then amplify result
to feed a A/D or V/F converter. It was relatively easy to get the
sonde board to generate a single freguency by bypassing the MUX
chip and feeding the pressure output directly to the V/F converter
and then one could use that output to feed a FREQIN or something
on a Stamp or PIC. The Audio tone at about 1.2kHz or something
gets real irritating after a while when playing with it and in the
end you just stick to the scope and F-counter even though audio is
a faster way to detect changes.
Cheers
--
Kalle Pihlajasaari kalle
spam_OUTip.co.za http://www.ip.co.za/ip
Interface Products P O Box 15775, DOORNFONTEIN, 2028, South Africa
+ 27 (11) 402-7750 Fax: 402-7751 http://www.ip.co.za/people/kalle
DonTronics, Silicon Studio and Wirz Electronics uP Product Dealer
1997\03\11@170810
by
Karoly Hoss
Philip Restuccia wrote:
>
> > > Matt,
> > >
> > > Not exactly what you are looking for, but I remember a model rocketry
> > > altimeter project in Radio Electronics or its latest incarnation
> > Electronics
what's the partnumber for the alt sensor by motorola ?
bye
charley
1997\03\12@104915
by
Andy Kunz
At 12:07 AM 3/11/97 +0100, you wrote:
>what's the partnumber for the alt sensor by motorola ?
>
>bye
>charley
Charley,
Visit http://www.design-net.com and look for the MPX parts (site search on
MPX). The MPX4100 and MPX5100-series parts have what you want. Form
factor is important.
Andy
==================================================================
Andy Kunz - Montana Design - 409 S 6th St - Phillipsburg, NJ 08865
Hardware & Software for Industry & R/C Hobbies
"Go fast, turn right, and keep the wet side down!"
==================================================================
1997\03\12@185911
by
Karoly Hoss
Andy Kunz wrote:
>
> At 12:07 AM 3/11/97 +0100, you wrote:
> >what's the partnumber for the alt sensor by motorola ?
> >
> >bye
> >charley
>
> Charley,
>
> Visit http://www.design-net.com and look for the MPX parts (site search on
> MPX). The MPX4100 and MPX5100-series parts have what you want. Form
> factor is important.
>
thanx for the info . the motorola site is ugly but useful :)
bye
charley
1997\03\13@011222
by
Tom Halaczkiewicz
Craig Bladow wrote:
> I would appreciate any information anyone might have on using the
> pressure sensors found on the Radiosonde weather balloon circuit
> boards, they are in a metal can - 8 lead package with the following
> marking: SDC 909-4502803 07
>
> Craig Bladow
>
I may be able to help you. Is this a TO-8 can with a hole in the top?
What is the pin configuration (how many pins per row?) If it is a TO-8
type pressure sensor it would be much simpler to get a new one (they are
not expensive), rather than try to reuse one. There are only a few number
of manufacturers of this type of part - and all of their sensors have very
similar electrical characteristics.
Tom Halaczkiewicz
'PICs in model rocketry'
1997\04\03@103951
by
Dave Duchesneau
At 11:01 AM 3/10/97 -0500, you wrote:
{Quote hidden}>At 02:15 PM 3/9/97 -0700, you wrote:
>>
>> Does anyone know of designs for a PIC
>>based altimeter for use in model rocketry?
>>
>>/*****************************************/
>>/* Matt Calder, Dept. of Statistics, CSU */
>>/*
http://www.stat.colostate.edu/~calder */
>>/*****************************************/
>
>Matt,
>
>I did an altimeter using a PIC and a Motorola absolute pressure sensor.
>
>Andy
>
>==================================================================
>Andy Kunz - Montana Design - 409 S 6th St - Phillipsburg, NJ 08865
> Hardware & Software for Industry & R/C Hobbies
> "Go fast, turn right, and keep the wet side down!"
>==================================================================
>
>
Any chance that you'd share the schematic and source for this? (Otherwise,
why mention that you'd done it...)
Dave Duchesneau
(Who'd like to make an altimeter to fit inside a 1" tube)
1997\04\03@142433
by
Andy Kunz
|
At 07:41 AM 4/3/97 -0800, you wrote:
>At 11:01 AM 3/10/97 -0500, you wrote:
You sure haven't read your mail in a while!
>>I did an altimeter using a PIC and a Motorola absolute pressure sensor.
>Any chance that you'd share the schematic and source for this? (Otherwise,
>why mention that you'd done it...)
Well, why not is because it was a proprietary item for somebody, and I
can't release that source code. However, it was rather simple:
PIC16C711 pin 17 to Motorola MPXS4100A6U Analog output (I forget which
pin). Software does the following:
On reset:
Turn on "Calibrating" LED, turn off "Ready"
Wait 15 seconds to warm up sensor (required by Mot).
Turn on "Ready" LED, turn off "Calibrating"
Call the current reading "0" elevation.
While the current reading is 0 +/- 2 bits or so
do nothing!
Endwhile
As fast as possible (10mS) store readings into the EEPROM
until the EEPROM is full (2K or more samples, about 10 secs per K).
The EEPROM is read into a PC, and the readings are plotted out to form a
chart showing altitude vs. time.
>(Who'd like to make an altimeter to fit inside a 1" tube)
Dave
Now you have everything you need. This is an ideal application of the
PIC12C7x part.
Andy
==================================================================
Andy Kunz - Montana Design - 409 S 6th St - Phillipsburg, NJ 08865
Hardware & Software for Industry & R/C Hobbies
"Go fast, turn right, and keep the wet side down!"
==================================================================
1997\04\04@014921
by
wterreb
|
>> Does anyone know of designs for a PIC
>> based altimeter for use in model rocketry?
Very recently I stumbled upon a design somewhere on the web that does
EXACTLY this. The documentation provided is great, complete with a
good description, circuit diagrams, part lists and code listings. The design is
an improvement on a similiar altimeter desing for Model Rockets that was
published in
RADIO-ELECTRONICS of October 1990, and uses the Basic-Stamp as its
processor. I can really recommend very strongly that you look at
this article. It even features some ingenious way of reading the
data from the altimeter.
I still have a printout of the original article, but I do not know anymore what
the URL of the website is. If you want to search for it on the web,
use keywords like Herve Cousin (the author), SCX15AN, Sensym etc. I
also still have the original article on my computer at home, so if you
don't find it, then please email me at @spam@wernerKILLspam
aztec.co.za and I will
email it directly to you.
Rgds
Werner
--
Werner Terreblanche http://www.aztec.co.za/users/werner
KILLspamwterrebKILLspam
plessey.co.za (work) OR RemoveMEwernerTakeThisOuT
aztec.co.za (home)
Plessey SA, PO Box 30451,Tokai 7966, Cape Town, South Africa
or at home : Suite 251, PostNet X5061, Stellenbosch, 7599
Tel +27 21 7102251 Fax +27 21 7102886 Home +27 21 8872196
------------------------------------------------------------
1997\04\04@020022
by
wterreb
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