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FreeTrack Forum > FreeTrack : English Forum > Support : Tracking System > upside down 3 point tracking.

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cyphr	#1 05/04/2012 - 16h20 Top
Class : Apprenti Posts : 2 Registered on : 05/04/2012 Off line	I'm building a freetrack rig, but my camera sits on my desk, meaning it will look up at my face and it will never see an LED mounted on top of the hat. My question is could I get away with mounting all three LED's on the bill of my hat, or would I need to get some vertical separation between the LED? Thanks for the help.
Steph	#2 06/04/2012 - 08h47 Top
Class : Moderator Posts : 656 Registered on : 16/11/2007 Off line	Yes, you need some retreat and vertical difference for the third LED in the middle, otherwise it don't works. But it should work, if you put the middle LED forward and higher than the two others. Have a try. You need to check the "Invert"-case in the "Profile"- section for "Yaw" and "Pitch" settings for that. Something like this: Edited by Steph on 08/11/2012 at 10h29.
cyphr	#3 06/04/2012 - 19h40 Top
Class : Apprenti Posts : 2 Registered on : 05/04/2012 Off line	Thanks for the reply, should I mount those middle LED's in teh usual place, or can I move them farther back, so I can keep that center LED's mount short. Also, this is offtopic, but I'm trying to follow the stickied guide for usb, but my math says that I need a 100ohm resxistor, not a 10 ohm for 50ma. Am I doing the math wrong? Using ohm's law I get 5v/.05 amps = 100 ohm.
dewey1	#4 06/04/2012 - 21h56 Top
Class : Habitué Posts : 191 Registered on : 25/06/2010 Off line	5-(3x1.5)/.05=10 Ohm This assumes a series circuit with LED Vf of 1.5 Volts.
Steph	#5 07/04/2012 - 11h31 Top
Class : Moderator Posts : 656 Registered on : 16/11/2007 Off line	Thanks for the reply, should I mount those middle LED's in teh usual place, or can I move them farther back, so I can keep that center LED's mount short. You can but shorter will be less precise. Give it a try with some flexible wire before you fabricate the final version.
Steph	#6 07/04/2012 - 11h43 Top
Class : Moderator Posts : 656 Registered on : 16/11/2007 Off line	dp sorry Edited by Steph on 07/04/2012 at 11h43.

FreeTrack Forum > FreeTrack : English Forum > Support : Tracking System > upside down 3 point tracking.

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