Step 1: The Materials and Tools
- 18 red LEDs 2.6 volts
- 2 green LEDs 2.1 volts
- 6 resisters 1/4 watts, 220 Ohms
- A plastic box approximately 4.5x9x1 inches
- Aluminum foil
- One 9 volt battery
- 1 battery holder
- 2 flip switches
- 1 switch
- Duct tape
- Electric tape
- Multi-purpose ties
- Soldering iron
- Wire stripper
- Exacto knife
- Super glue
Step 2: Building the Base
Now, once you're done with that, glue aluminum foil to the triangles (not the parts that bend!) and let it sit overnight. I added aluminum foil so that it acts as a reflector for the LEDs. Make sure that you leave plenty of room around the triangles so that when you're done, bend the aluminum foil to make a border around the triangle.
Poke 9 holes in each triangle so that they aren't too close to the ends.
I did it a bit differently, but this way's probably easier.
Step 3: Attaching the LEDs
When you are done testing, solder the LEDs and resistors in series and then solder all of the pieces together. (Use wire in between the LED and resistor because you need it longer.)
Put the triangles in the box and tape them with electrical tape. Make sure that you don't short the circuit.
Step 4: Attaching the Flip-switches
Attach the LED to the switch as it shows on the picture. Then tape it to the handlebars. You can put it wherever you want, but its easiest to have it at the end.
Step 5: Putting It on the Bike
Cut a hole in the side of the box for the main switch to go in and connect all of the wires as shown on the schematic diagram. Then just attach the box to the back of your bike. I can't exactly tell you where because everyone has a different bike but if you have a basket, put it on the basket; if you have a bag, put it on the bag; and if you don't have either, you can either duct tape it underneath the seat or make a wire holder.