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FreeTrack Forum > FreeTrack : English Forum > Support : Tracking System > Can't get camera to pick up on LEDs

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visionviper	#1 25/03/2008 - 05h01 Top
Class : Apprenti Posts : 4 Registered on : 25/03/2008 Off line	I set up a 3 point IR LED hat and everything powers on just fine. If I put the LED really close to the webcam it picks up the IR light. I have tried changing various settings but I cannot get it to work. My webcam is a Logitech Quickcam Fusion and I am using a floppy disk as a light filter.
larockonoli	#2 25/03/2008 - 06h40 Top
Class : Apprenti Posts : 10 Registered on : 10/03/2008 Off line	We may need to know more info. Did you remove the IR filter on the webcam? whats the power source, LED info, whats the resistor/resistors used? It might be that your not getting enough current to the LED, it could be the IR filter blocking some of the light, or it might also be your exposure settings or other camera settings.
visionviper	#3 25/03/2008 - 15h05 Top
Class : Apprenti Posts : 4 Registered on : 25/03/2008 Off line	I did not remove the IR filter on the webcam. From the research I did it didn't look like I would need to. I am using 2 AA batteries and three of the high output LEDs from radioshack. I am using a 22ohm resistor if I remember correctly. I did get the resistors based on the recommendation of someone in this forum in another topic for another person using the same LEDs as me.
visionviper	#4 27/03/2008 - 23h31 Top
Class : Apprenti Posts : 4 Registered on : 25/03/2008 Off line	I removed the IR filter. It seems that is what needed to be done. I am now working on trying to get everything setup and configured. It also looks like I am going to need to reposition the center LED I have. Free track never picks up on it unless I move closer to the screen.
fullperception	#5 28/03/2008 - 15h51 Top
Class : Apprenti Posts : 17 Registered on : 20/03/2008 Off line Mail Www	Hello! I noticed that you're using the RadioShack LED's. There's another fella in here that's building a similar setup too. I looked them up and they're rated for 1.2 volts @ 29milliamps. Check that your LED's are the same Are you connecting them in a series circuit or a parallel one? Here's an equatiuon for a parallel circuit: Resistor value = 3 volts from the batteries - 1.2 LED voltage / .029 Amp Resistor value = 1.8 volts / .029 Amp Resistor value = 62 Here's an equation for a series circuit: Resistor value = 3 volts from the batteries - 3.6 LED voltage / .029 Amp Resistor value = -.6 volts / .029 Amp Resistor value = negative value! not enough battery power to run. Good luck! Christopher

FreeTrack Forum > FreeTrack : English Forum > Support : Tracking System > Can't get camera to pick up on LEDs

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