Arduino Forum

Using Arduino => LEDs and Multiplexing => Topic started by: olimason on Jan 28, 2013, 09:34 pm

Title: Can Arduino Uno Power 12v short LED strips? (new user needs help!)
Post by: olimason on Jan 28, 2013, 09:34 pm
Hi Everyone,

Im a Max/Msp user trying to graduate to Arduino and this is my first post so please be kind!  :)

What i hope to do is power 12 led strips from my Ardurino Uno, (these are the strips, http://www.ledlightszone.co.uk/led-tape/60-flexible-led-strips-non-waterproof-72w-30pcs.html )

Each strip will only be a max of 15cm,

Is this possible or will i need some other bits and bobs?

Kind Regards,

Oli
Title: Re: Can Arduino Uno Power 12v short LED strips? (new user needs help!)
Post by: CrossRoads on Jan 28, 2013, 09:40 pm
You will "need some other bits and bobs"

Simplest is a part like UNL2003 or ULN2803.
Connect the + of your strips to a +12V supply, connect the - of hte strip to the output of the ULN2003.
ULN2003 Gnd connects to same Gnd that 12V supply and Arduino connect to. COM is not connected.
Arduino connects to the ULN2003 input - when input is high, output goes low, strip turns on.
Title: Re: Can Arduino Uno Power 12v short LED strips? (new user needs help!)
Post by: arduinohabib on Jan 29, 2013, 01:50 am
YOu can drive it with a transistor or MOSFET
Title: Re: Can Arduino Uno Power 12v short LED strips? (new user needs help!)
Post by: olimason on Jan 29, 2013, 11:40 pm
Thanks guys I will check them out!

Regards,

Oli
Title: Re: Can Arduino Uno Power 12v short LED strips? (new user needs help!)
Post by: MikMo on Jan 30, 2013, 08:44 am
Check this site:

http://www.stumbleupon.com/su/1ZsVg5/genericnerd.blogspot.com/2009/05/arduino-mood-light-controller.html/

If you just want to control the RGB levels, you can skip most of the components in the lower left part of the schematic.
Title: Re: Can Arduino Uno Power 12v short LED strips? (new user needs help!)
Post by: kwyjib0 on Jan 30, 2013, 09:10 am
I think these tutorials (http://learn.adafruit.com/digital-led-strip) might be helpful.
Title: Re: Can Arduino Uno Power 12v short LED strips? (new user needs help!)
Post by: olimason on Jan 30, 2013, 10:27 am
Brilliant stuff!

I now feel confident i can order a few things and get stuck in.  :D

Thanks for the input everyone,

Ill post up if/when I complete my project!

Regards,

Oli