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Topic: Powering light strip from arduino? (Read 1 time) previous topic - next topic

the_big_dill

Hey guys,

I recently accomplished at making led lights light up to music, was proud of that :)

I now face a problem with powering a strip of 30 LEDs, looks a bit like this: http://www.acmelite.net/images/1/p/R30X_S/led-strip-light-R30X_S-2930.jpg

From what i see on different suppliers, this strip of lights require 12V, is there any way i can provide that much voltage from arduino, or anything close to it?

Unfortunately, i have no information on my strip of lights...

Sorry, if this is a poor question, i am only a beginner.

Cheers,

Phil.

johnwasser

Use and NPN transistor or an N-channel MOSFET to switch the voltage and current.  See this tutorial about high current 9and voltage) loads: http://itp.nyu.edu/physcomp/Tutorials/HighCurrentLoads
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Grumpy_Mike

You can't power the strip from the arduino but you can control the strip from the arduino.
There is an important distinction there.

the_big_dill

Thanks Mike,

I found that the strip needs 12V.

Would i use a transistor to make this work?

I have a couple 2n2222 transistors and UA741CN Op Amps, would those work?

Thanks.

Grumpy_Mike

Quote
I have a couple 2n2222 transistors and UA741CN Op Amps, would those work?

Probably not.
The 741 is a very old op amp and has no role in controlling an LED strip.
The 2n2222 can only handle 500mA of current or so. What current does you LED strip take?

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