Filed in archive
AJAX
by gautam on July 24, 2006
Its setup is quite simple
• A gumstix connex computer running Linux and a webserver with CGI (Common Gateway Interface).
• Some low level c code to do input mixing and giving control outputs to the Lego motors.
• A static HTML page as an AJAX control panel.
• A compact flash 802.11b wireless card.
Anybody who has an AJAX enabled browser would be able to control the robot by loading the static page hosted on the robot's web server and by using the control panel to control it in real time.
Given below are the steps to control the control panel:
1. At the center, radius = 0, motors stops
2. Increase distance to center, r > 0, motor(s) moves
3. 0 < atan2(y,x) < PI/2, go forward
4. -PI/2 < atan2(y,x) <0 , go backwards
There is also some mixing based on the angle atan2(y,x). For example, moving the mouse cursor to atan2(y,x) = 0, r=1, will yield a full forward on the left tracks and full backwards on the right track with a continues mixing based on the following formula with adjustments (+/-) depending on quadrant.
double f(double x) { return cos(2*(x-PI/2)); }
Thnx Waelchatila
Trackback: http://publish.creative-weblogging.com/publish/mt-tb.pl/30106
Addthis
Ask
Blinklist
del.icio.us
Digg
Fark
Facebook
Google
Lycos
Ma.gnolia
Mr Wong
Netscape
Netvousz
Newsvine
Reddit
StumbleUpon
Slashdot
Tailrank
Technorati
Wink
Yahoo
Vote for Heard About AJAX Remote Controlled Lego Robot?:
|
Rating: 9.00 out of 1 vote(s) cast.
|
Subscribe
Use the search to look for other interesting posts
| RSS |  See all blog subscribe options |
 What is RSS? | |
| Yahoo! |
|
| Addthis |
|
| Bloglines |
|
| Newsletter | |
| Follow us on Twitter! |
