Here's the basics needed to set up your LED lighting...

A source for LED units... HERE

A link with a lot of good info about different types of LED lights... HERE

If you want to build some custom lights, here's some input on it... HERE

[IMG]local://upfiles/2318/200D886EE4CD42E0B65CE59770D9D314.jpg[/IMG]


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12 LED's Wiring Diagram
Notice that NO load resistor is needed. . Also notice the Anode and Cathode connections. The Anode is the LONGER lead. The LEDs MUST be connected in series, NOT in parallel.
NOTE: If using a light up switch connect the 3rd connection on the switch to ground



Multiple LED's Wiring Diagram
Notice that NO load resistor is needed. . Also notice the Anode and Cathode connections. The Anode is the LONGER lead. The LEDs MUST be connected in series, NOT in parallel.
NOTE: If using a light up switch connect the 3rd connection on the switch to ground



Similar LED Wiring Diagram
Here's a similar LED wiring diagram showing 4 seperate LED's (NOT connected). Notice the load resistor that IS needed for each LED. For LED/load resistor information check out THIS SITE. . Also notice that the Anode on the LED is connected to positive. The Anode is the LONGER lead. NOTE: If using a light up switch connect the 3rd connection on the switch to ground.



LED Wiring Diagram
Notice the load resistor that IS needed. Also notice that the Anode on the LED is connected to positive. The Anode is the LONGER lead.
NOTE: If using a light up switch connect the 3rd connection on the switch to ground








Source: http://www.oznium.com/forum/topic3633

 

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Thanks!!!!

 

Good stuff, thanx lots!

 

How can you tell how many LEDs are needed when running in parallel and no resistor?

I dont know the specs on my LEDs but I have to use a 675 ohm resistor so my LEDs dont burn up

 

without the specs, you won't be able to figure out what type of load, how many LEDS, etc are required for a circuit. There are too many variables here; size, brightness, and then top that off with this scenario; out of 1000 LEDS made in a batch, 50 of those may have a different rating on them than the other 950 do. we would need the volt and amp ratings from the LEDS to figure this out for you.

 

this may help you....


http://led.linear1.org/led.wiz

 

Thanks

I tried using similar led specs


3mm blue led, water clear

Voltage:2.8-3.4v 20mA

Wave length 465-470nm

Brightness: 3000-3500MCD

View Angle: 25-30 degree



The chart shows for every 3 LEDs i need one 100 ohm resistor. Ill give it a shot and text it for an hour or so. See if they burn up or get too hot.

If the resistor gets too hot I could just add another LED correct?

 

you're talking about dissipating heat here which correlates to wattage. Simply increase the wattage of the resistor you're using

 

o alright, Im testing a 1/4 watt 100 ohm resistor with 3 LEDs. Its been about 45 mitures so far. They are still glowing but I havent felt for heat yet. (KNOCK ON WOOD)