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<DIV><FONT face=Arial size=2>Hehe. Ultimate irony, sometime down the road I'm
planning on building a Tube Amp for my bass! :) And I'm working on repairing an
old tube radio that my parents have. So I've got a little experience with the
old buggers! :)</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Anyway, thanks for all the help with the altimeter
stuff. I'm actually looking at switching it over to a Basic Stamp I rather than
the 2 - largely because of cost. 2 is about $50, while 1 is about $34. The only
main difference is the amount of memory, so if I did go with a 1 I would have to
throw out the idea of doing any datalogging, but I don't really care about that
so much. As for programming, I think I could manage that, we've got a simple way
to tell if we've hit apogee with the accel data, then a preset timer from there,
then *poof* out goes the ejection charge.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I need to download some of the documentation,
though, and start figureing some of this stuff out. Right now the main thing
that is confusing me is the pinouts. The code says out12 for the led, but on the
schematic it's connected to pin 17, and pin 4 shows up twice...unless I am
completely mis-reading something, which I probably am. Anyway I'm starting to
get really excited about this project, it looks like I'll be able to build
exactly what I need for a lot cheaper than I could buy one. My one big problem
now is finding some way to program the basic stamp - programming boards cost
$$$. But hell, I go to a tech school, with a rather large EE department. I'm
sure I can find SOMETHING to borrow! :)</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Brian</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV>----- Original Message ----- </DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=jmiguez@bellsouth.net href="mailto:jmiguez@bellsouth.net">John
Miguez</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=simpits-chat@simpits.org
href="mailto:simpits-chat@simpits.org">Non-tech or other tech related messages
for Simpits</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, November 04, 2003 7:47
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [simpits-chat] Altimeter
Question</DIV>
<DIV><BR></DIV>
<DIV><FONT color=#000080 size=2>Hee hee, you younglings need an old fart to
tell you about TTL. Except, I am having a senior moment and can't
remember what the first "T" means. The other two letters are Transistor
Logic. </FONT></DIV>
<DIV><FONT color=#000080 size=2></FONT> </DIV>
<DIV><FONT color=#000080 size=2>Transistors came out when I was a kid.
They are these tiny replacements for the vacuum tube that helped put a man on
the moon. :)</FONT></DIV>
<DIV><FONT color=#000080 size=2></FONT> </DIV>
<DIV><FONT color=#000080 size=2>John</FONT></DIV>
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style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000080 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=bjones@pipecomp.com.au href="mailto:bjones@pipecomp.com.au">Ben
Jones</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=simpits-chat@simpits.org
href="mailto:simpits-chat@simpits.org">Non-tech or other tech related
messages for Simpits</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, November 04, 2003 3:16
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [simpits-chat] Altimeter
Question</DIV>
<DIV><BR></DIV>
<DIV><FONT size=2>Brian,</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>i dont know alot about the basic 2 paralax stamp , to
start telling you yes or no you can /cant do it</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>but from the wright up in a electronic catalogue i
have it is noted that the stamp 2 can be connected to " push buttons,
led's ,and other TTL level devices, and with extra components to
non-TTL devices such as relays "</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>so if this is correct popping a charge via relay
shouldnt be a problem in theory</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>the other thought i have is what the F*** is a TTL device
, i have never heard of these in all of my electrical studies .... but
hey i get told all the time i always have my head up my ass ...
hehe,</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>as for modifying ya code i might have to be solved
buy a guru programmer(s) on the list</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2>regards</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2>ben</FONT></DIV>
<DIV><FONT size=2><A
href="mailto:bjones@pipecomp.com.au">bjones@pipecomp.com.au</A></FONT></DIV>
<DIV> </DIV>
<DIV> </DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=hangr18@hotmail.com href="mailto:hangr18@hotmail.com">Brian
Sikkema</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=simpits-chat@simpits.org
href="mailto:simpits-chat@simpits.org">simpits chat</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, November 04, 2003 6:37
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [simpits-chat] Altimeter
Question</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>Hey Guys,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I've got a question, not about an aircraft
altimeter, but one I'm thinking of building for model rocket
use.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>For those of you into the hobby, you know
that even the most basic altimeter good for data logging and, most
importantly to me, ejection charge timing, can be very expensive (cheapest
I've found to do what I need is about $120). But I've found what
seems to be a very nice setup online, here:</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2><A
href="http://www.rocket-roar.com/rap/alt.html">http://www.rocket-roar.com/rap/alt.html</A></FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I'm confident I could build this altimeter
and get it working, I know enough to do that, but I'm not quite
experienced enough to modify it to what I need it to do (blow an ejection
charge). This setup is just a data-logger. What I need is for it to trip a
relay at some pre-specified altitude or time after apogee which would blow
the ejection charge. This is pretty important, because the launchsite we
use up here is very narrow, flanked by a dense forrest on one side and
Lake Superior on the other. It's nice and long, but if you drift to the
side you're screwed! I lost two rockets to the trees on our last launch,
and I would have lost my prized V2 to the Lake had the parachutes not come
off on the last flight (thats a funny story in and of itself - I'll tell
it later ;) </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>So anyway, long story short, anyone here have
experience with PICs and whatnot, who could take a look at the circuit and
code and give me some ideas on modding it to trip a relay? I'd be VERY
appreciative! :)</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>If we can modify this circuit, it could be
used for all sorts of useful things, including staging. My mouth waters
with the possibilities! :)</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Brian</FONT></DIV>
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