Pages: [1]   Go Down
Author Topic: Controlling 2-4 LED's  (Read 759 times)
0 Members and 1 Guest are viewing this topic.
South East USA
Offline Offline
God Member
*****
Karma: 5
Posts: 655
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Would this RFP30N06LE MOSFET work for turning 2-4 LED's in series or parallel  on/off with 1 pin?

http://www.sparkfun.com/products/10213
Logged

0
Offline Offline
Shannon Member
****
Karma: 214
Posts: 12424
Arduino rocks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Definitely - and they could be powerful LEDs too if you want (1, 3, 5W luxeons or similar).  You will need current-limiting resistors and an appropriate power supply naturally.
Logged

[ I won't respond to messages, use the forum please ]

Manchester (England England)
Offline Offline
Brattain Member
*****
Karma: 631
Posts: 34506
Solder is electric glue
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

Quote
and they could be powerful LEDs too if you want and they could be powerful LEDs too if you want
I wouldn't use resistors on high power LEDs, you need constant current drivers to make it safe and reliable.
Logged

South East USA
Offline Offline
God Member
*****
Karma: 5
Posts: 655
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

I wouldn't use resistors on high power LEDs, you need constant current drivers to make it safe and reliable.
???  You can't just use resistors to drop 12 volts or 5 volts down to the proper voltage for high power LED's.  'Constant current drivers?'  Is there some good reading you'd recommend to better understand this?  I'm wanting 1-4 LED's to kind of light up an area under a cabinet.  Not sure how big of LED's I need.  There's 'super bright' LED's, but I don't think they really use that much current.  Does anyone have any good info on this topic?

ps.  would something like this not work with just some resistors...
http://cgi.ebay.com/2-Super-Bright-LED-Touch-Light-Set-Under-Cabinet-Closet-/390297205315?pt=LH_DefaultDomain_0&hash=item5adf86ba43#ht_2106wt_1139
« Last Edit: March 16, 2011, 08:16:32 am by SouthernAtHeart » Logged

Manchester (England England)
Offline Offline
Brattain Member
*****
Karma: 631
Posts: 34506
Solder is electric glue
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

Here are some old discussions on high power LEDs
http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1234273497
http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1258412419

There are also some good links off those threads.
Logged

South East USA
Offline Offline
God Member
*****
Karma: 5
Posts: 655
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

I guess I won't really need the high power LEDs.  Here's what I plan to use:
http://cgi.ebay.com/ebaymotors/LED-STRIP-30CM-DRL-DAYTIME-RUNNING-LIGHT-AUDI-BLUE-12V-/130394189542?pt=Motors_Car_Truck_Parts_Accessories&hash=item1e5c196ee6#ht_5317wt_939

...I shouldn't need anything but the RFP30N06LE MOSFET to use this since my power supply is 12 volt and it is made to connect to automotive 12 V.
Logged

Pages: [1]   Go Up
Jump to: