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FreeTrack Forum > FreeTrack : English Forum > Support : Tracking System > parallel or serial

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mireazma	#1 26/08/2011 - 20h07 Top
Class : Apprenti Posts : 21 Registered on : 10/11/2009 Off line	Hello. I searched for topics on this matter but no results were returned. So I'm asking here: what are the down/up sides to each?
Blindasabat	#2 28/08/2011 - 02h19 Top
Class : Habitué Posts : 83 Registered on : 02/05/2011 Off line	Not sure why they propose parallel, serial is easier to make and all LED's burn at the same strength.
albx	#3 28/08/2011 - 11h12 Top
Class : Habitué Posts : 70 Registered on : 26/08/2010 Off line	Blindasabat @ 28/08/2011 - 02h19 a dit: Not sure why they propose parallel, serial is easier to make and all LED's burn at the same strength. it depends on the supplied voltage you can give them. I personally prefer the parallel.
Blindasabat	#4 28/08/2011 - 15h16 Top
Class : Habitué Posts : 83 Registered on : 02/05/2011 Off line	Oh yes, now I remember you can do with less batteries with parallel. Thanks for the headsup albx.
mireazma	#5 29/08/2011 - 18h51 Top
Class : Apprenti Posts : 21 Registered on : 10/11/2009 Off line	Thanks for the tips!
dewey1	#6 29/08/2011 - 23h08 Top
Class : Habitué Posts : 191 Registered on : 25/06/2010 Off line	Actually for a given voltage of lets say 6 volts (4 AA batteries), here are the scenarios for a current of 50mA: Series circuit 3 LED would require a 30 ohm resistor. 50mA total current. Parallel circuit 3 LED would require (3) 90 ohm resistors. 150mA total current. Batteries would last 1/3 as long with parallel circuit. 3 times more current. For example a series circuit may be 9 hours while the parallel circuit will be 3 hours. For optimal battery life, the series circuits is better. For USB powered, use the series circuit because it will have the lowest total current consumption with 5 volt supply. Use a 10 ohm resistor. LED brightness may vary whether it is series or parallel. Each LED has its own tolerances. For the headtracking application, series circuit is more than adequate. Even the TrackIR Pro Clip is a series circuit with about 15 to 20mA current.
mireazma	#7 06/09/2011 - 22h06 Top
Class : Apprenti Posts : 21 Registered on : 10/11/2009 Off line	Wow, thank you for the complete insight!

FreeTrack Forum > FreeTrack : English Forum > Support : Tracking System > parallel or serial

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