Have a LED question.

[scavind]

I'm making this board for my girlfriend with her name in LEDS on it for her birthday. I've got 4 out of the 6 letters done but I need to know what kind of resistor should I put on this if anyone knows or has an idea. It works fine off of this 9v battery I have but maybe 2 9vs in parallel would work better for mah? Anyways. What kind of resistor should i put on this if anyone knows or has any idea about my power supply/ resistor question because I don't want to give it to her for it to burn out or catch on fire and blow up at her house...that would be bad... Pics here-

It looks better lit up but 9v is dead...It should look like C H A N considering its not done yet.

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[Jeep]

If you can send me a schematic of how you are wiring them, and the color of each led is important as they have different forward voltage drops,, I'll do some calculations and hook you up. Send a diagram to [email protected]

 

[SteelCityNitro]

I know little about this stuff, but would a voltage regulator do the trick?

 

[scavind]

I've actually decided to do something else. I couldn't get it to work properly and i think some burned out during testing...so ima make something simpler with the leds that are left. Thanks for your concern though. Much appreciated