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well thats saying what the supply can be, what you need to look at is the Vf=voltage forward and the Forward current.
on this it say the Max Vf is 3v and max current is 100mA so you dont want to be running these at max. also might help if we knew what supply you were using  basically need to use this equation to work out the resistance needed R = (Vs - Vf) / I R=resistance, Vs=voltage from source, Vf=Forward voltage of LED and I=desired current of LED so Vs what ever your source is, Vf... well a value lower than 3volts xD, and I should be something around the 50-90mA range as you don'#t want to run it at max. think im right in what ive said but if someone spots a mistake please shout out so we all can learn  |
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Awesome, thanks for the equation and the clarification on forward voltage sasso, I'll be looking for a resistor straight away.
I was going to use a 6v 300mA power supply such as this one: http://uk.farnell.com/jsp/displayProduct.jsp?sku=1176285&CMP=e-2072-00001000 EDIT: Found 'em  http://www.t2retail.co.uk/Electronic_Components_Resistors/15_Ohm_1_2W_5_Carbon_Film_Resistor_5_Pack EDIT 2: Well, I wanted to buy the resistors from the same website as all the rest but there are lots of different kinds, the search options are a lot and I do not understand them really. I think I'll buy the 6th from the top of the list here below (RESISTOR, CARBON COMP, 1/4W 15R) and cross my fingers hoping it will work. http://uk.farnell.com/jsp/search/browse.jsp?N=500006+1000291+294595&Ntk=gensearch_001&Ntt=15+ohm+resistor&Ntx=mode+matchallpartial&No=0&getResults=true&appliedparametrics=true&locale=en_UK&catalogId=&prevNValues=500006+1000291&filtersHidden=false&appliedHidden=false&originalQueryURL=/jsp/search/browse.jsp%3FN%3D500006%2B1000291%26Ntk%3Dgensearch_001%26Ntt%3D15%2Bohm%2Bresistor%26Ntx%3Dmode%2Bmatchallpartial%26No%3D0%26getResults%3Dtrue%26appliedparametrics%3Dtrue%26locale%3Den_UK%26catalogId%3D%26prevNValues%3D500006%2B1000291 |
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have you also looked on the main website there is an LED circuit generator... basically asks what is the supply voltage, vf, I and tells you what you need
also 6v 300mA..... is 300mA the capacity of it? because depending on how its arranged you might only last 1 hour before needing to charge xD |
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