If you want to learn about what these materials are check out these wikipedia entries: All Rights Reserved. To do this you can do a couple of things: Thank You for the refresher course They are all wired in parallel. When same value resistors are wired together in series you add their resistance.
LEDs for Beginners
LEDs wired in series are connected end to end the negative electrode of the first LED connects to the positive electrode of the second LED and the negative electrode of the second LED connects to the positive electrode of the third LED and so on and so on
Light-Emitting Diodes (LEDs)
Brown because the first digit in the value resistor I needed is 1 Green because the fifth digit is 5 Brown because in order to get to you have to add one 0 to 15 to get to This is helpful when reusing LEDs that have had their leads cut. When I poked around online I found that all resistors have a coding system on them that tells you what value they are.