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RSS > Newbie asking a question or 2, Need a little advice

sailor	#1 23/07/2013 - 22h36 Top
Class : Apprenti Posts : 6 Registered on : 23/07/2013 Off line	Hi guys, after thinking of getting a TRackerIR and serching the internet i came across freetrack and this forum ... I have read a great deal on the forum over the last few days or so. I'm imprest with all the different style's and makeshift tracking systems you guy's have come up with.. Anyway thought i would bite the bullet and have a go. After all i have a old ps2 eye cam doing nothing a few old phone charges knocking about plus some usb cables and wires ect ect knocking about.. Only thing i have not got is the IRLED and RESISTOR but both from ebay about £6 (beats paying £130 for trackerir ).. My question is i am going for the Sfh485p IRLED*3 here is the spec....IR EMITTER, 5MM, 880NM Diode Case Style: T-1 3/4 (5mm) Fall Time tf: 500ns Forward Current If(AV): 100mA No. of Pins: 2 Operating Temperature Range: -40C to +100C Peak Wavelength: 880nm Radiant Intensity: 5.5mW/Sr Rise Time: 600ns SVHC: No SVHC (18-Jun-2012) Supply Voltage Range: 1.5V Viewing Angle: 40 Bulb Size: T-1 3/4 (5mm) Forward Current If: 100mA Forward Current If Max: 100mA Forward Voltage VF Max: 3V Full Angle: 160 Half Angle: 80 LED / Lamp Size: 5mm / T1.3/4 LED Colour: Infrared Package / Case: Radial Pitch Spacing: 2.54mm Radiant Intensity Max: 6.3mW/Sr Radiant Intensity Min: 3.15mW/Sr Turn Off Time: 0.5s Turn On Time: 0.6s Voltage Vf Typ: 3V Wavelength Typ: 880nm My charger is a sony ericsson model GSAC-MN/3 spec... input 100-240vac-150mA 50-60hz Output 5.1v=450mA I am going too mod the end, for male USB, charge too my tracker led using a female end.. so main question is.... I think i have used the calculater right, BUT can someone confirm for me, that i will be ok with a 8 or 10 Ohm RESISTOR, before i buy from ebay... 2nd question is Will i need too file these irled's down as they are full angle of 160 and half angle of 80 degrees.. Cheers guys for the time and help
Steph	#2 24/07/2013 - 08h34 Top
Class : Moderator Posts : 656 Registered on : 16/11/2007 Off line	Ahoy sailor, so main question is.... I think i have used the calculater right, BUT can someone confirm for me, that i will be ok with a 8 or 10 Ohm RESISTOR, before i buy from ebay... 10 Ohm resistor will be ok. 2nd question is Will i need too file these irled's down as they are full angle of 160 and half angle of 80 degrees.. The SFH485P got a half angle of 40° and this is more than enough, you don't need to file them down, as they are already flat on top.
sailor	#3 24/07/2013 - 11h31 Top
Class : Apprenti Posts : 6 Registered on : 23/07/2013 Off line	Ahoy matie... Thanks for the confirmation, will order the stuff off ebay..

FreeTrack Forum > FreeTrack : English Forum > General Discussion > Newbie asking a question or 2

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