LED Help

[Lhk97]

I'm not very good with calculating Ohms so can someone do some math for me. I'm using 2 of these and 1 of these. Also how many 9 volt batteries would I need?

 

[metalsplinter2]

You only need 1 9v connector so
http://www.radioshack.com/product/index.js...rentPage=search
Give me a sec to find a form I found yesterday about leds

you may want to get a on/off switch too still trying to find the thread with all stuff u need also get some wiring either 20 gauge or 16 gauge red/ black just buy 1 and use a marker to mark the negative and positive

Ok so far i found this the 10th post down

http://405th.com/forums/index.php?showtopi...=light&st=0

 

[Lhk97]

Thanks for the fast reply, but I still don't know what Ohm resistor I need. I know how to hook it up and I have a switch, but need to know what resistor to use.

Also no need to triple post.

Edit: I have this switch.

 

[andrew]

I'm about to wire also. can anyone explain how??

 

[Lhk97]

I'm about to wire also. can anyone explain how??

Its not hard, do it in this order.

Battery
Switch
Resistor
LEDs in sequence
Back to battery

 

[metalsplinter2]

I'm trying to find the thread I saw last night. Kinda hard someone was asking about a fan in helmet and linked the thread to led wiring give me a few more minutes

I feel bad now getting yelled at from a guy from same state I'm from lol

 

[metalsplinter2]

HOLY GOD I FOUND IT GO HERE

http://405th.com/forums/index.php?showtopic=2481

11 post down starts there and gets you through everything! Good luck guys

 

[Lhk97]

Not to be your local forum nazi, but learn to use the edit button!

Also, thanks for the answer. I guess I'm using a 100 Ohm.

 

[Pkmnjunky7]

Thats the setup i used. All my leds had built in resistors so i didnt have to worry about it.

PS: heres a dancing cat.

 

[Lhk97]

Not for the helmet, I'm doing an assault rifle.

 

[metalsplinter2]

Ya I'm new to forms joined yesterday still learning how to do things...Sorry and hope that link helped you...

 

[mowhawkman]

look how i did for my leds my brothers friends his dad he gave me those two flash led and i just had to drill a hole for it and done easy to remove and change batteries

http://fr.youtube.com/watch?v=ThQo-rngB5k

 

[Robogenisis]

I don't think that setup will work. From the picture of the green ones, it looks like they have resistors built-in. I'm pretty sure that you can't run 2 12V LEDs off of one 9V battery. You probably need a 12V battery. In that case, if you want to run all the LEDs off the same 12V power source, you'll need a 470 ohm resistor (yellow, violet, brown) for the white LED, and hook it all up like this.
[attachment=1119:LED_Chart.jpg]

 

[rishonritter]

look how i did for my leds my brothers friends his dad he gave me those two flash led and i just had to drill a hole for it and done easy to remove and change batteries

http://fr.youtube.com/watch?v=ThQo-rngB5k

not to be a butthole or anything, but... in the video, it looks like you ruined the back of the helmet but drilling and ripping off bits of the back

 

[FirePhoenix]

this is where the stickys are for...

 

[Robogenisis]

this is where the stickys are for...

The stickies only show a specific situation, if you are using 2 white or blue LEDs powered by one 9V. That can't apply to every LED wiring situation.

 

[mowhawkman]

not to be a butthole or anything, but... in the video, it looks like you ruined the back of the helmet but drilling and ripping off bits of the back

i know its not the most beautiful but im not done neither