What resistors are needed on a DIY LED panel if the power source is changed from 9v DC battery to 12v DC transformer? Answered
I have a "star mural" which consists of 6 white LED lights (to power the fiber optic "stars") and 4 red LED lights of the "lazer cannons" of a space ship. (Yes, I'm a Star Wars fan, OK?)
Anyway, the mural is currently powered by a total of three 9 volt DC transistor batteries. Two of the batteries, each power 3 LED lights for the stars and one battery powers the 4 red LED lights. The white LEDs are wired in parallel, so they should be considered as follows: (One 9v DC battery powers three LEDs) x2. And as mentioned before, one 9v battery powers 4 red LEDs in parallel (with each set of 2 Red LEDs wired in series).
I've included photos of the resistors showing them up-close and from a distance, to see them in thier current wirring configuration. (see below)
The best I can ssume the color code to be for the star LEDs is: Brown, Black, Orange, Gold -OR- Brown, Black Brown, Gold.
For the Red LEDs it looks like: Brown, Green, Brown, Gold.
So, If I change from a 9 DC volt battery, to a 12 DC volt (transformed from 110v AC) do I need to change the resistors currently in place?
Sorry, if I am leaving out important information or not describing my situation clearly enough. I just don't want to fry my LEDs because I've over-powered them. Any help that can be offered would be greatly appreciated. Thanks!