The Flashing Bike Bottle Light!
Not only can you produce flashing red luminosity, but you can actually drink from it, too! It is powered by two AA batteries that are easily accessible from the side of the bottle. It also has a fully waterproofed LED/switch assembly hidden inside the lid, all while still retaining the ability to be drank from! The part are inexpensive and minimal, so let's get started!
Step 1: Parts and Materials
- A plastic water bottle (size of the bottle depends on the size of your bike's bottle cage)
- A flashing LED that takes about 3 volts
- A 2x AA enclosed battery case
- A small toggle switch
- Two AA batteries (rechargeable is better)
- Velcro (to attach battery case to bottle)
- 150+ grit sandpaper
You'll also need a hot glue gun, an X-acto knife, an electric drill, and a soldering iron
Step 2: Modifying the Cap
After drilling a hole in the center of the cap, screw the switch securely into place. We won't be needing to take it out again.
Next, poke 2 holes to the side of the switch for the battery case leads, and push the leads through.
Step 3: Wiring
After wiring, test your circuit to make sure your LED is flashing properly. If it works, go on to the next step. If not, examine your circuit and individual connections to troubleshoot the problem.
Step 4: Potting the Circuit
Note: the switch itself is not waterproof, so be careful when you run the water over the cap.