Go to Post P.S. I'm not boring! - Matt Krass [more]
Home
Go Back   Chief Delphi > Technical > Electrical
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
Closed Thread
Thread Tools Rate Thread Display Modes
  #1   Spotlight this post!  
Unread 28-02-2011, 09:04
jwakeman jwakeman is offline
Registered User
FRC #0063 (Red Barons)
Team Role: Mentor
 
Join Date: Jan 2011
Rookie Year: 2010
Location: 16510
Posts: 182
jwakeman is just really nicejwakeman is just really nicejwakeman is just really nicejwakeman is just really nicejwakeman is just really nice
Photo sensor light source

Hello,

Our team has the photo sensors mounted underneath the robot and there was some concern that it would be too dark for the sensors to see any light reflecting off the line tape. So we added a little 6V incandescent light bulb to shed some light. Now I am remembering that I read somewhere that the photo sensors have their own infrared light source that they use to detect the line. So the question is will the incandescent light bulb help, hurt or have no effect? As a corollary would the photo sensors work in complete darkness? Would they actually operate best in complete darkness?

Thanks!
Joe
  #2   Spotlight this post!  
Unread 28-02-2011, 10:12
Joe Ross's Avatar Unsung FIRST Hero
Joe Ross Joe Ross is offline
Registered User
FRC #0330 (Beachbots)
Team Role: Engineer
 
Join Date: Jun 2001
Rookie Year: 1997
Location: Los Angeles, CA
Posts: 8,599
Joe Ross has a reputation beyond reputeJoe Ross has a reputation beyond reputeJoe Ross has a reputation beyond reputeJoe Ross has a reputation beyond reputeJoe Ross has a reputation beyond reputeJoe Ross has a reputation beyond reputeJoe Ross has a reputation beyond reputeJoe Ross has a reputation beyond reputeJoe Ross has a reputation beyond reputeJoe Ross has a reputation beyond reputeJoe Ross has a reputation beyond repute
Re: Photo sensor light source

the sensors do have their own IR source. If the light you added produces light in the frequency range the sensor is looking for, it will reduce the sensitivity of the photo sensor. If your light does not, then there is no affect.
  #3   Spotlight this post!  
Unread 28-02-2011, 11:49
jwakeman jwakeman is offline
Registered User
FRC #0063 (Red Barons)
Team Role: Mentor
 
Join Date: Jan 2011
Rookie Year: 2010
Location: 16510
Posts: 182
jwakeman is just really nicejwakeman is just really nicejwakeman is just really nicejwakeman is just really nicejwakeman is just really nice
Re: Photo sensor light source

From your response Joe it sounds like the lights can only hurt. How do you feel about the statement that the ideal environment for the sensors is one without any ambient light?
  #4   Spotlight this post!  
Unread 28-02-2011, 12:16
RyanN's Avatar
RyanN RyanN is offline
RyanN
AKA: Ryan Nazaretian
no team
Team Role: Mentor
 
Join Date: Jun 2006
Rookie Year: 2005
Location: Austin, TX
Posts: 1,127
RyanN has a reputation beyond reputeRyanN has a reputation beyond reputeRyanN has a reputation beyond reputeRyanN has a reputation beyond reputeRyanN has a reputation beyond reputeRyanN has a reputation beyond reputeRyanN has a reputation beyond reputeRyanN has a reputation beyond reputeRyanN has a reputation beyond reputeRyanN has a reputation beyond reputeRyanN has a reputation beyond repute
Re: Photo sensor light source

Don't worry about adding light or blocking out light. These sensors are very robust, designed for industrial applications. Just tune the sensors using the knob on top to your liking. That's it.
__________________
Taking a break from mentoring for a few years. (Is that allowed?!?)

Controls Mentor
@rnazaretian

Previous teams:
Team Fusion, FRC 364
Garnet Squadron, FRC 4901
Closed Thread


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 18:55.

The Chief Delphi Forums are sponsored by Innovation First International, Inc.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright © Chief Delphi