Leds Free Resistors
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I need help on wiring LED's!!! i need to wire like 200-300 of them!?
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!
V = IR (this is Ohm's law)
or
v=amps * resistance
if these are pretty standard such as the ones that I use for my embeded systems. They are 5v and can only handle 20ma current so
5v=0.002amps * r
resistor=250 ohm
Normally 220 ohm, 330 ohm, and 1k ohm are used.
LEDs are a diode. That means that there is a significant drop from the otherside of the LED.
Usually the longer wire is positive and the shorter wire is negative on the LED. The resistor can go before or after the LED
I would wire it as Parallel, but with that many you may want to do groups in series, it will suck up more power though.
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