We now need to attach our LED strip to our laptop bag. We are going to cut the strip into six smaller strips of 24 LEDs each. We will then solder cables to join the points back together to create a LED matrix, which we will attach to the front of our bag using Velcro.
Start by very carefully cutting your LED strip just after the 24th LED. You can use sharp scissors for this, but be sure to cut through the center of the four copper solder pads. Now, cut 5 lengths of your yellow and blue stranded cable and 5 lengths of your red and black 18 AWG cable. The length needs to be enough to join the LED strip back together; mine were about 5 cm. Once you have cut all of your lengths of cable, strip and tin each end.
Now, turn your LED strips over and secure the piece you are soldering to and your cable you are soldering with a pair of helping hands. To solder...