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<DIV><SPAN class=187274715-05072008><FONT face="Comic Sans MS" color=#000080
size=2>Hi,</FONT></SPAN></DIV>
<DIV><SPAN class=187274715-05072008><FONT face="Comic Sans MS" color=#000080
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=187274715-05072008><FONT face="Comic Sans MS" color=#000080
size=2>The CPU does not need to run at 1 GHz for this situation. Only the
counter needs to run at high speed and accept interrupts that start and stop the
counter. A separate counter chip is my suggestion. </FONT></SPAN></DIV>
<DIV><SPAN class=187274715-05072008><FONT face="Comic Sans MS" color=#000080
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=187274715-05072008><FONT face="Comic Sans MS" color=#000080
size=2>1. Start the counter and the light pulse.</FONT></SPAN></DIV>
<DIV><SPAN class=187274715-05072008><FONT face="Comic Sans MS" color=#000080
size=2>2. When the light pulse returns turn off the counter.</FONT></SPAN></DIV>
<DIV><SPAN class=187274715-05072008><FONT face="Comic Sans MS" color=#000080
size=2>3. Read the counter when convenient. </FONT></SPAN></DIV><!-- Converted from text/rtf format -->
<P><FONT face="Times New Roman"></FONT> <BR><B><FONT face="Comic Sans MS"
color=#000080>Rud Merriam K5RUD</FONT><FONT
face="Times New Roman"></FONT></B><BR><FONT face="Comic Sans MS"
color=#000080>ARES AEC Montgomery County, TX</FONT> <BR><I><FONT
face="Comic Sans MS" color=#000080><A
href="http://thehamnetwork.net/">http://TheHamNetwork.net</A></FONT></I> </P>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV></DIV>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left><FONT
face=Tahoma size=2>-----Original Message-----<BR><B>From:</B> ray xu
[mailto:rayxu@tx.rr.com] <BR><B>Sent:</B> Friday, July 04, 2008 7:08
PM<BR><B>To:</B> dprglist@dprg.org<BR><B>Subject:</B> RE: [DPRG]Wall-E ->
1GHZ computers laser rangefinding<BR><BR></FONT></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT id=role_document face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Dean: I see why the
breadboard is a bad idea. All I need from the controller is because I
need to interface 1gHz counters to it. </SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Ron: I am already
done with my sonar project. All I need to do now is to put it on a board
and in a project box. Also, I did some searching, and the closest thing
(<A
href="http://www.repairfaq.org/sam/lr/">http://www.repairfaq.org/sam/lr/</A>)
I came to says that it uses a computer controller.</SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"></SPAN></FONT> </P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Heres my theory of
operation:</SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">The controller will
be instructed to trigger a laser pulse (650 nm laser diode), start a
timer/counter, wait for the beam to come back (receiver: OPT101 with concave
lens on top of photo-sensitive area), disable the counter/timer, do some
calculations, display results, and loop.</SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"></SPAN></FONT> </P>
<DIV>
<P class=MsoNormal><FONT face=Arial color=navy size=3><SPAN
style="FONT-SIZE: 12pt; COLOR: navy; FONT-FAMILY: Arial">___________________<BR>Ray
Xu<BR><A href="mailto:rayxu@tx.rr.com" target=_blank>rayxu@tx.rr.com</A><BR><A
href="http://www.dprg.org" target=_blank>DPRG</A> member<BR><A
href="http://tech.groups.yahoo.com/group/oopic/" target=_blank>OOPic</A> group
member<BR><A href="http://tech.groups.yahoo.com/group/SeattleRobotics/"
target=_blank>Seattle Robotics</A> group member<BR><A
href="http://rayxublogs.blogspot.com/" target=_blank>My
Blog</A><BR></SPAN></FONT><FONT face=Arial color=navy size=1><SPAN
style="FONT-SIZE: 8pt; COLOR: navy; FONT-FAMILY: Arial">Custom HTML generated
signature upon sending</SPAN></FONT><FONT face=Arial color=navy><SPAN
style="COLOR: navy; FONT-FAMILY: Arial"> </SPAN></FONT></P></DIV>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT face=Tahoma size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">-----Original
Message-----<BR><B><SPAN style="FONT-WEIGHT: bold">From:</SPAN></B>
dprglist-bounces@dprg.org [mailto:dprglist-bounces@dprg.org] <B><SPAN
style="FONT-WEIGHT: bold">On Behalf Of
</SPAN></B>DeltaGraph@aol.com<BR><B><SPAN
style="FONT-WEIGHT: bold">Sent:</SPAN></B> </SPAN></FONT><FONT face=Tahoma
size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">Friday, July 04,
2008</SPAN></FONT><FONT face=Tahoma size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"> </SPAN></FONT><FONT face=Tahoma
size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">2:59
PM</SPAN></FONT><FONT face=Tahoma size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"><BR><B><SPAN
style="FONT-WEIGHT: bold">To:</SPAN></B> dwhall256@gmail.com;
dprglist@dprg.org<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B>
Re: [DPRG]Wall-E -> 1GHZ computers laser rangefinding</SPAN></FONT></P>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT face="Times New Roman"
size=3><SPAN style="FONT-SIZE: 12pt"></SPAN></FONT> </P>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT face=Arial color=black
size=2><SPAN style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial">Dean /
Ray </SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT face=Arial color=black
size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial"></SPAN></FONT> </P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT face=Arial color=black
size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial">Dean,Good point on
Ray's project.</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT face=Arial color=black
size=2><SPAN style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial">I guess
the question is to find out what you are trying to do,
Ray.</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT face=Arial color=black
size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial"></SPAN></FONT> </P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT face=Arial color=black
size=2><SPAN style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial">That
is, if you are attempting to measure time of flight of light you may be
talking an advanced project where specialized
hardware/ knowledge might be needed. </SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT face=Arial color=black
size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial"></SPAN></FONT> </P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT face=Arial color=black
size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial">Reference designs
are a good place to start.</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT face=Arial color=black
size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial"></SPAN></FONT> </P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT face=Arial color=black
size=2><SPAN style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial">Yeah,
breadboarding in this range would be out.</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT face=Arial color=black
size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial"></SPAN></FONT> </P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT face=Arial color=black
size=2><SPAN style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial">Might
suggest playing with sonar first. You will learn a good deal and sound's
propagation rate is 1 millionth the speed of light. Master that first. Just Me
Talking.</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT face=Arial color=black
size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial"></SPAN></FONT> </P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT face=Arial color=black
size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial"></SPAN></FONT> </P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT face=Arial color=black
size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial"></SPAN></FONT> </P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT face=Arial color=black
size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial">Ron</SPAN></FONT></P></DIV>
<P class=MsoNormal
style="MARGIN-BOTTOM: 12pt; MARGIN-LEFT: 0.5in; MARGIN-RIGHT: 0in"><FONT
face=Arial color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial"><BR><BR></SPAN></FONT></P>
<DIV>
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style="MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0.5in; MARGIN-RIGHT: 0in; TEXT-ALIGN: center"
align=center><FONT face=Arial color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial">
<HR align=center width="100%" SIZE=2>
</SPAN></FONT></DIV>
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style="MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0.5in; MARGIN-RIGHT: 0in"><FONT
face=Arial color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial">Gas prices getting
you down? Search AOL Autos for fuel-efficient <A
title=http://autos.aol.com/used?ncid=aolaut00050000000007
href="http://autos.aol.com/used?ncid=aolaut00050000000007" target=_blank>used
cars</A>.</SPAN></FONT></P></DIV></DIV>
<P><FONT face=Arial size=2>No virus found in this incoming message.<BR>Checked
by AVG - http://www.avg.com<BR>Version: 8.0.135 / Virus Database: 270.4.5/1533
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