This is an easy step, but one of the more time consuming. In this step we are going to setup each LED to have the resistor soldered on and add the hot glue to the LED.
1) Make sure that you are using the right resistor for the LED and the power supply. For my setup I decided it would be the easiest to have one resistor for each LED so I would not have to deal with any crazy wiring when I start putting it on the branches. Since I have a 12 volt power supply, and I am using Pure White LED's I needed 470 Ohm 1/4 watt resistors. Here is a great website to help you out with figuring out what Resistors to use for your project:
Grab you LED and a Resistor, cut the negative lead on the resistor to about 1/4 - 1/2 inch long. Then grab the Resistor and cut one side (doesn't matter which end)
so it is about 1/4 - 1/2 inch long, take a look at the picture below as an example.
2) Solder the resistor to the Negative lead on the LED, repeat for as many LED's that you want for you branches. I did 5 for each branch = 25 total LEDs.
3) Once that is done, grab your hot glue gun and your LED with resistor combo. This gets a little tricky; put a bit of hot glue on the LED (for my gun it was a total of 4 squeezes of the trigger)
, since the glue is hot it wants to drip off. The trick is to put a little on at a time while spinning the LED continously, keeping the glue from dripping off (an easy way to spin the LED is to put the leads of the LED into a small tube so you can spin the tube like rolling a pencil in between your fingers)
. Once it starts to cool down you can shape it how you like. I tried to make them look like a Pussy Willow blossoms.
By putting the hot glue on the LED, it not only creates a different shape and look to the LED, but it diffuses the light so the have more of a glow rather then 25 little spot lights.