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FreeTrack Forum > FreeTrack : English Forum > Support : Tracking System > 3 point cap ,leds not lighting up,(I think)

RSS >  3 point cap ,leds not lighting up,(I think)
alonzo #1 26/09/2009 - 17h41

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Registered on : 17/09/2009

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I just builded the setup:

3V batteries
3 leds osram sfh485p
3 resistor (15 ohms each)

but i can't see them lighting up,even with digital camera or phone camera..
alonzo #2 26/09/2009 - 18h43

Class : Apprenti
Posts : 3
Registered on : 17/09/2009

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I resolved,I had to invert polarity.
but in the step-by-step guide provided with freetrack for building a 3 points cap is written that you have to solder positive lead to resistor

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FreeTrack Forum > FreeTrack : English Forum > Support : Tracking System > 3 point cap ,leds not lighting up,(I think)

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