This Arduino bike lighting project upgrades your bike’s light and takes it to the next level so that the backlight of the bike automatically notifies others when you are turning.
We used Arduino UNO as our main microcontroller (use Nano or Pro mini to shrink the size if needed), Accelerometer to detect the 3 axis directions and Neopixel to blink the LEDs in the corresponding direction of movement.
Blinks toward the direction you are turning in green (e.g. Turning to the left or the right)
Turns to red when you are riding forward.
Featured Adafruit Products!
NeoPixel Stick – 8 x 5050 RGB LED with Integrated Drivers: Make your own little LED strip arrangement with this stick of NeoPixel LEDs. We crammed 8 of the tiny 5050 (5mm x 5mm) smart RGB LEDs onto a PCB with mounting holes and a chainable design. Use only one microcontroller pin to control as many as you can chain together! Each LED is addressable as the driver chip is inside the LED. Each one has ~18mA constant current drive so the color will be very consistent even if the voltage varies, and no external choke resistors are required making the design slim. Power the whole thing with 5VDC (4-7V works) and you’re ready to rock. Read more.