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jonnyuk	#1 03/03/2008 - 17h29 Top
Class : Apprenti Posts : 3 Registered on : 03/03/2008 Off line	hi guys i have set up my webcam and things and its all working just about to start ordering parts to build the IR headset i am using the SFH485p LED click here to view them i am hoping that it will be possible to power the 3 LED's from 2x1.5v AA batteries. will this be possible? also what resitor will i need for the circuit? apologies for asking but i was no good at electrical circuit calculations back in high school and im still no good :P cheers jonnyuk Edited by jonnyuk on 03/03/2008 at 17h33.
tankbuster	#2 03/03/2008 - 23h55 Top
Class : Habitué Posts : 66 Registered on : 28/08/2007 Off line	Jonny Yes, that will work fine. I use a 27 Ohm resistor on a similar circuit, though I think that might have been a little bit too weak. On my modified VX-1000, the points are very bright indeed. Paul
jonnyuk	#3 04/03/2008 - 09h53 Top
Class : Apprenti Posts : 3 Registered on : 03/03/2008 Off line	ok, i will go and pester my old electronics teacher and see if he can spare a 27ohm resistor or 2. thanks for the reply Edited by jonnyuk on 04/03/2008 at 09h53.
the_soupdragon	#4 04/03/2008 - 14h03 Top
Class : Apprenti Posts : 44 Registered on : 26/02/2008 Off line	I checked out Farnell for the IR LED's but the minimum order was £20. Anyone know a UK supplier who sells them without a minimum order or a £15 shipping fee? Cheers SD
jonnyuk	#5 04/03/2008 - 19h35 Top
Class : Apprenti Posts : 3 Registered on : 03/03/2008 Off line	yeh i noticed harnells little stick in the works! im getting some from maplin now, slightly smaller but should still work.

FreeTrack Forum > FreeTrack : English Forum > Support : Tracking System > circuit calculation help :S

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