Lemme guess… that Ford stereo was taken out because the light was flickering on & off, a good WHACK was a good temporary fix. I put rods in the 4 holes and...
Hi Gang! I've started another one of my "bits to bots" classes-- this time out here at the local art center, and with adults. One of the students is very keen...
... That's great. Mel was a great help when I was grinding my telescope mirror and getting confused on the testing mechanisms. He really knows how to explain...
Hi, Does anybody happen to have an off-line calulator that will show the distance and bearing between two points specified in latitude and longitude?...
There's a good resource for a number of great circle distance formulas here: http://www.movable-type.co.uk/scripts/latlong.html You can toss this one into...
Doh!!! It never occured to me that I could save the web page and run it off-line! I assumed it would takes weeks of digging to get someones java script to run....
If you're doing this on a fixed point embedded processor, the trig functions can sort of be a pain. There's a decent writeup here for using CORDIC algorithms...
I have a Coldfire 5270 running at 145Mhz. It doesn't seem to blink when I throw trig functions at it. This is for my red robot. See pictures at the bottom of...
If anybody is interested in what I'm trying to do, you can look at the picture. It is a screen dump from Google Earth. You can see the start point and my...
Jeff Sampson said: Wednesday, November 05, 2008 2:49 AM ... Super job Jeff. Wonderful documentation so people can see what RoboMagellan contestant is up...
Sometime early in the morning I got my calculations working. I was trying to use the approach "5. Convert GPS lat/lon to robot X,Y." from David Anderson's web...
Anybody using Google Earth? If so, does anybody know how to set the image rotation to true north? Or can you have it tell you the direction that it is...
Here's a preview from a MAKE:TV episode. http://blog.makezine.com/archive/2008/10/make_tv_preview_ii.html Here's a page showing how to film and submit your...
I wrote code yesterday (or was it in the middle of the night?) to execute a list of x/y coordinate pairs. This is the first test of that code. This is a simple...
Since my GPS path was looking like this: http://www.sampson-jeff.com/rr/gps_error.jpg I decided to look at it again. I did notice that I was using the same ...
I am reading NMEA records from the GPS. Both the latop that works and the Netburner board with custom code (and doesn't work) are reading the same NMEA...
Be careful with power. RF likes clean power. Output from a switching regulator could be screwing things up. Make sure power is clean and everything is well...
I connected the switching regulator and then it didn't work at all. The LED came on but it wouldn't get a fix. I thought it didn't have any serial output. But...
I did several things: Switched back the 7805 regulator. Added 1000uf cap. Added 0.1uf cap. Added strap between power ground and the ground plane. (At the GPS) ...
I think I am going to bail on Chicago this time. I really don't like the sound of the weather forcast. And I really need some sleep. If I thought I had...
I'm coming, but not sure exactly what time (sometime between 7-9) From: tcrobots@yahoogroups.com [mailto:tcrobots@yahoogroups.com] On Behalf Of Alan Kilian ...
Terry Schumacher
Terry.Schumacher@...
Nov 7, 2008 4:38 pm
2889
Jeff, I suggest ferrite beads on all lines going to the module, and on all motor leads as close a possible to the motor. Get those 100pf and 1000pf (.001uf) ...
... Let me start with my motors. I can't get to the brushes because they are inside. I can't get it apart because there is an encoder disk pressed onto the end...
Jeff Sampson wrote: Dan Larson wrote: Jeff, I suggest ferrite beads on all lines going to the module, and on all motor leads as close a possible to the motor....
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