Leds Free Post
| Powered by phpBay Pro |
i need help on wiring 200-300 leds how do i do that?
I am making a deadmau5 head and need to figure out how i need to wire these leds i will need to seperate them into 3 sections- 2 eyes consisting of about 75 leds each and the mouth having at least 200 i dont necessarily need them battery powered because that would be so many batteries. heres a picture of the head to better understand what i am trying to make
http://vis-soft.com/uploads/posts/2010-12/1291899345731deadmau.jpeg
here are the leds i want to purchase, they come with resistors for free but idk which resistors i need.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=170514524978&ssPageName=STRK:MEWAX:IT#ht_2862wt_1138
its a serious inquiry and i would love the help because idk how many resistors it needs, what to power it with, etc.! thanks in advance!
If you do what the first answer says then you will probably fry all of your LEDs and possibly have your battery explode. You will notice that the current rating for the LEDs says less than 30-mA. You are responsible for setting up a circuit that keeps the LEDs from going over 30-mA of current by putting the appropriate resistor in the circuit.
There are many ways to create such a circuit but if you want all of the LEDs to be about the same brightness then you probably want to wire each LED by itself. You will need a pretty hefty power supply for this. For example:
Lets say you wire up a single LED using a 5V power supply. The LED is forward biased and will drop about 3.1V (per the datasheet) when on. This leaves 5V - 3.1V = 1.9V that needs to go across the resistor. If you want to drive the LED at about 20-mA then you will need a resistor value of R = 1.9V / 20-mA = 95-Ohms.
You see, when a diode changes to the ON state, any increase in voltage causes an enormous increase in current. If you knew exactly how much voltage was going to drop across the diode and could set the power supply voltage exactly then you could rig up something like in the first answer. But since power supplies vary and the LED forward voltage drop varies then you have to use a current limiting resistor.
If you contact the manufacturer of the LEDs, they should be able to provide expert advice on using them.
Items Recently Purchased From This Site:
| Powered by phpBay Pro |
Leave a Reply
You must be logged in to post a comment.