So this year I decided to go as Megaman for Halloween. There's no good costumes you can buy, but I found a guy who made one for his kid at http://www.instructables.com/id/Mega-Man-Costume/

I won't be rocking the full costume, just the buster cannon. Unfortunately I haven't held a soldering iron since 8th grade so my calculations for a complete circuit are gonna be way off. I already purchased the parts from Radioshack and I wanted to see if anyone could help me with setting them up or picking out new parts if the ones I got aren't good.

My materials right now include:
25-watt soldering iron
Lead-free .032" 96/4 silver-bearing solder
Four 5mm yellow LED's
Back of the package lists them as follows:
Forward (Supply) Voltage: 3.0 VDC max
Luminous Intensity: 55mcd
Peak emission: 585 typ.
20mA
One Jumbo Super-Bright 10mm Red LED
Back of the package lists it as follows:
Absolute maximum ratings
Forward current: 40mA max
Forward voltage: 5VDC max
Reverse voltage: 6VDC
Power dissipation: 100mW
Electro-optical characteristics
Forward voltage: 2.4V +or- .03V
Peak emission: 660nm
Luminous Intensity: 5000mcd (typ. at 20mA)
A package of 18-gauge hookup wire to connect it all
A couple of 1 watt resistors (half are 100-ohm and half are 1k-ohm)
And my power supply is a 9V Battery

I was thinking a 9V would be too much to power just 5 LEDs, but an LED Circuit calculator I used said it wouldn't be enough. That's why I wanted to come here and get your guy's opinion on the matter. The finished product should look something like this:

Any help would be greatly appreciated. Thanks!

 

Have you got the part numbers of the LEDs?
It's definitely possible, but you might need some different resistors.

 

Forget the part numbers. You already gave enough information.
Put 2 yellows in series with 150 ohms.
Repeat that.
Put the big one in series with 165 ohms, at least 1/2 watt.
Connect the three strings to the battery.

 

Okay that sounds good to me, but I have one question how would you connect multiple series to the same power supply? Sorry I'm kind of a noob =(

 

You just made 3 series strings. Attach the end of one string to the positive of the battery. Attach the other end of that same string to the negative of the battery.
Repeat this 2 more times.

 

LEDs, 555s, Flashers, and Light Chasers

 

Voila! Took a lot of electrical tape, but I got it done lol. Thanks a lot for the help.

 

Yay! That was about the smartest noob I've ever seen. Showed up with the right information and got it working in 3 questions.

Hats off to Iscaria!

 

Lol thanks. Technically I'm not a noob cause I took Electronics in 8th grade and did way more complex stuff than this, but that was almost 10 years ago so I get a handicap lol. Now I just gotta work on building the actual cannon. I'll post pics of the finished product when I'm done.