Older 3d Model:

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Actual thing (so far):

***broken link removed***

Anyway, I'm wiring up some 3mm 3v LEDs, and I'm trying to figure out the resistance needed. I keep coming accross the formula R = (5 - V) / I, where V is the voltage that I want the LEDs to have, 5 is the amount I'm feeding it (from my computer's power supply), and I would be the LED's mA (.02A per LED).

The problem I'm having is that I think I'm doing something wrong with calculating the total amount of resistance I'll need. For an example, I'm going to have 4 LEDs hooked up in parallel, and I want them to have 1v each. I tried multiplying the amperage by 4 (.08 instead of .02), giving me the formula;

R = (5v - 1v) / .08

...but the LEDs appear to be at full brightness. (In case I'm just picking the wrong resistor, I'm using a 47 ohm, yellow-purple-brown-gold resistor, the closest to 50 ohms that I have).

Please give me any insight you have as to what I'm doing wrong, whether it's in calculating the resistance or just using the wrong components. Thanks in advance.