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PostPosted: 13.07.2003 14:34 
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Junior Modder
Junior Modder

Joined: 03.06.2003 04:25
Posts: 7
Location: Bendigo, Victoria, Australia
Ok, i bought 2 ultra bright 5mm blue LED's from jaycar electronics because we want to make the glow pad mod, what resistor would i need for 2 LEDS (the ultra bright blue 5mm ones) comming from the 5V cable, i couldnt get any help from dick smith/jaycar because the bitch and say stuff like, we cant tell you because we will get sued if your computer burns down my house.


HELP me Plz befour i kill myself,

Oh and the leds were 4 bucks each if that helps with determining anything :)

thanx

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PostPosted: 13.07.2003 14:49 
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Site Admin
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Joined: 24.01.2002 10:09
Posts: 4683
Location: Finland
If you can't tell what the voltage and forward current for the leds are you are in trouble. :) You may try Metku's resistor calculator with values like 4 volts for led voltage and 20mA for forward current. You have to use the calculator at the bottom part of the page because 5 volts can't support two leds in parallel if they need that 4v each.

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PostPosted: 13.07.2003 22:03 
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Mini Modder
Mini Modder

Joined: 06.02.2003 01:49
Posts: 62
Location: england
ye, i got 3 extreme brightness red LEDs from maplins (7cd) , they only gave the forward current (20mA) but no forward voltage :x

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PostPosted: 28.07.2003 12:33 
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Junior Modder
Junior Modder

Joined: 28.07.2003 12:14
Posts: 8
Location: Adelaide, Australia
i dont even use resistors with the computer if u have 2 leds and u hook it up to the comp (5volts) wire it up so it's like the long wire on the 1 led onto the short wire on the other it should work fine

Hope this helps! :D

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PostPosted: 31.07.2003 00:08 
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Ultra Modder
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Joined: 09.06.2003 08:30
Posts: 1592
Location: Orlando, FL, USA
that always works, connecting them in a series.

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