May 26 2006, 06:08 PM
Okay, I'm putting some led under the jewel. I'm putting 8 5mm blue leds off a 12v (i think thats right ... its one of those fan molex things ... tell me if thats not 12v), and i used a resistor calculator to figure that i needed a 56 ohm 3 watt resistor. ... I have a bunch of a bunch of 100 ohm resistors. Can i wire a few resistors in series, and the leds in parallel?? If so, How many of the 100 ohm resistors. I was thinking 6, but thats me just 1/2way understanding and making the best guess.
May 27 2006, 01:53 AM
You can't use the 100 ohm 1/4 watts to replace a 56 ohm 3 watt resistor. What you can do though is instead of wiring it in parallel to 12V, wire it to 5V and put one 100 ohm resistor per LED.
May 27 2006, 02:09 AM
I would connect all your LED's to the RED wire (5V). Then use SICKdimension's resistor calculator (found at his web site) to calculate which resistor you need. That way you have 8 led's and one resistor!