Hello Everybody,
i want to add an Standard LED-Stripe to my Project.
Something like this (german, but ideal for me): http://www.ebay.de/itm/LED-Modul-BLAU-vergossen-3-LEDs-12V-DC-Spot-Strip-BLUE-/150642552824?pt=DE_Haus_Garten_Lampen_Licht_Leuchten&hash=item2312feeff8
Now, these Stripes are Supplied with 12V DC.
So how can I make these things glow with my Arduino? Or what additions do I need?
Thank you and Have a nice Day
TK
Like this but with your LED strip in place of the relay coil and diode:
Provide +12V at "Relay Power V+". The transistor will let the Arduino turn the strip on and off (or dim with PWM).
Thanks for answering,
but I don´t have any outstanding power-source.
I only have the 5V on the IO-Pins. Furthermore I could get 9V from a battery.
You will need a Boost Converter to get up to 12V.
If your 9V is from one the small square batteries, it will not last very long, they are only good for a few hundred milliAmp Hours.
I thing your right.
I found a 7,2V / 1,8Ah Battery-Pack. Like these things for the RC-Cars. Fits 
Do you think this Item should solve my Problem?
http://www.ebay.de/itm/3-5-28V-to-1-25-26V-DC-DC-Converter-Boost-Buck-Step-Up-Step-Down-Voltage-Module-/300651400404?pt=UK_BOI_Electrical_Test_Measurement_Equipment_ET&hash=item4600384cd4
Have a nice Day
TK
Bit overkill, but yes.