Cool LED Display

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brighth2o lights

WHY: Making cycling safer!

The purpose of making this project is, to increase a cyclist safety in hopes to decrease accidents. The BrightH2O bottle increases safety by making you more visible.

WHAT: What was used to create it

The prototypes are based off an Attiny85 development board. Here is the hardware used to create it:

  • Digispark attiny85 development board
  • RGBW Led ring
  • 850 mAh rechargeable battery


  • Lipo Charger
  • Water Bottle
  • 3D Printer to printed cap

HOW: Building the prototype


First step is to get the hardware wired together. Start by solder the LED Ring to the board. There are 3 wires to connect, power ground and signal.




The board is powered can be powered by a Lithium polymer battery.


After getting the hardware connected, its time to install any drivers and Software.


Follow these steps to get your computer setup to program the development board:

You'll need to add the following to the "Additional Boards Manager URLs”. Then install Digistump boards and examples.


After the you able to upload programs to the board, we will need to install a library to help us control the LEDS. We'll be using the NeoPixel library.

NeoPixel library installation steps:

From the Sketch menu, > Include Library > Manage Libraries... In the text input box type in "NeoPixel". Look for "Adafruit NeoPixel by Adafruit" and select the latest version by clicking on the dropbox menu next to the Install button. Then click on the Install button. After it's installed, you can click the "close" button.


LED Code

Now that your system is ready, we start programming the LEDS. Open the 'simple' example from NeoPixel:


Change the pin 1, and set the correct amount of LEDS.

#define PIN            1   #define NUMPIXELS      16  

You will need to change the following line when using REGW leds:

Adafruit_NeoPixel strip = Adafruit_NeoPixel(16, PIN, NEO_RGBW + NEO_KHZ800);  

After those changes you should be able to upload the example and see the LEDS turn on!



You can create you own patterns and animations by using this sequencer app:


After you have created your animation. You can then copy the output and upload to the board.

Ride safe!