View Single Post
  #3   Spotlight this post!  
Unread 02-02-2004, 21:55
velocipenguin velocipenguin is offline
Registered User
#0246 (Overclocked)
Team Role: Programmer
 
Join Date: Feb 2004
Location: Boston, MA
Posts: 77
velocipenguin is on a distinguished road
Send a message via AIM to velocipenguin
Re: Tracking beacon without servo

Quote:
Originally Posted by Random Dude
Well the simplest way would be to just turn the robot untill you see the beacon in both sensors (similar to line following), and then drive straight forward.
Other methods would include essentially building your own servo using a motor, and some sort of feed back (such as a pot or encoder)
The problem with this method is that the sensors are very sensitive to reflections. The servo approach uses heatshrink tubing over each of the sensors to limit how much area each of them can see. You can't do this with a pair of fixed sensors, because they'd only detect a signal at a certain distance from the beacon (where both sensors point directly at it). You could, of course, do without the tubing, but this would cause the sensors to trigger when they're pointed anywhere within 180 degrees or so of the sensors.