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'[PIC]: Rocket Project Complete'
2000\08\27@010422 by Sean H. Breheny

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Hi all,

Thanks to all those who helped me with my guided rocket experiment this
summer. Myself and a friend tested it, and it didn't come anywhere near the
target, primarily because the target was being blown around by the wind and
we could never get it to stay in the field of view of the sensor. Isn't it
always the case that something simple slips your mind, and it thwarts your
efforts?! I spent so much time planning the rocket that I forgot about the
wind's effect on a tethered balloon until only a couple of hours before the
launch, at which time I couldn't do anything about it.

However, we learned a lot and had a tremendous amount of fun doing it, and
plan on trying again in a year or so, when we have more time and can select
a very calm day, or widen the sensor field of view.

We really put a lot of effort into it: it ended up costing something like
$500 and taking about 400 man-hours of work. There were two PICs onboard,
and one on the target. :-) For this reason, I tagged this message [PIC].

Here is the URL with info and pictures. I hope to have larger pictures and
a video of the launch and launch preparations soon:

http://www.people.cornell.edu/pages/shb7/btsam.html

Thanks especially to Hans DeVries, Peter Peres, Paul Webster, and all those
who gave ideas. Hans, I used your "virtual inductor" circuit and after
adjusting the component values for the frequencies I was using, it worked
great and allowed the circuit to remain in the linear mode of operation,
even when pointed right at the sun!

Sean

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2000\08\27@141322 by Lawrence Glaister

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Hi Sean
congratulations on your rocket project.
Is there any chance you would publish your finished circuit diagrams
for your project.... I am intrigued with the IR detector circuit you
mention.

=======================================================
Lawrence Glaister VE7IT             email: spam_OUTlgTakeThisOuTspamjfm.bc.ca
1462 Madrona Drive                  http://jfm.bc.ca
Nanoose Bay BC Canada
V9P 9C9
=======================================================
{Original Message removed}

2000\08\27@152042 by Sean H. Breheny

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Hi Lawrence,

Thanks! Sure, I put a JPG of the schematic of the pulsed light sensor at

http://www.people.cornell.edu/pages/shb7/tschem.jpg

Sean

At 11:10 AM 8/27/00 -0700, you wrote:
{Quote hidden}

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2000\08\28@074954 by Andrew Kunz

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So when do we get to see the video?

Andy

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2000\08\28@082443 by Sean H. Breheny

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Hi Andy,

Well, I have the VHS tape sitting here, but I have to get a hold of a video
capture card. I know someone who has one, but it is a really high end type
(meant for industrial apps) and I am not sure that it comes with software
to produce a standard video file (i.e. .avi,.mov, etc.). So, if it does,
then a couple of days. If it doesn't ,a litle longer.

Sean

At 07:49 AM 8/28/00 -0400, you wrote:
>So when do we get to see the video?
>
>Andy
>
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2000\08\28@083930 by Andrew Kunz

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I can take care of that for you if you like.  8mm works a lot better, but a good
VHS will do OK too.  The videos on my site are all from an 8mm camera.
(http://www.rc-hydros.com/videos.hmtl)

Andy

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2000\08\28@085148 by Sean H. Breheny
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Thanks Andy!

If I can't get it to work here within a few days, I will probably take you
up on your offer. I have it on 8mm, too, but I am a bit reluctant to send
out the original (afraid it will get lost in shipment). Are you saying that
an 8mm original is better, or that even an 8mm copy is better than a VHS
copy (I have no way of making a one generation 8mm copy, I would have to go
thru VHS first, then back again).

Sean

At 08:38 AM 8/28/00 -0400, you wrote:
{Quote hidden}

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2000\08\28@100508 by Andrew Kunz

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>If I can't get it to work here within a few days, I will probably take you
>up on your offer. I have it on 8mm, too, but I am a bit reluctant to send
>out the original (afraid it will get lost in shipment). Are you saying that

Insure the content of the tape for some big amount.  That usually makes it so
they don't lose it.

>an 8mm original is better, or that even an 8mm copy is better than a VHS
>copy (I have no way of making a one generation 8mm copy, I would have to go
>thru VHS first, then back again).

8mm is a much better innate quality.  It uses Beta format (are you old enough to
remember the Beta/VHS wars?).  A copy of VHS will be worse than VHS.  If you
don't send the original, try an 8mm-8mm copy (no VHS) instead.

Andy

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2000\08\29@160257 by John Wynne

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Testing

<< Hi Andy,

Well, I have the VHS tape sitting here, but I have to get a hold of a video
capture card. I know someone who has one, but it is a really high end type
(meant for industrial apps) and I am not sure that it comes with software
to produce a standard video file (i.e. .avi,.mov, etc.). So, if it does,
then a couple of days. If it doesn't ,a litle longer.

Sean

At 07:49 AM 8/28/00 -0400, you wrote:
>So when do we get to see the video?
>
>Andy
>
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