Research project for Digital Systems where we built a Light-up-Skateboard, for which we reseached different digital devices like BlueFruit LE Bluetooth low energy (BLE 4.0) - nRF8001 Breakout - v1.0, Adafruit Neopixel Digital RGB LED Weatherproof Strip 30 LED, etc. This Skateboard had LED lights tagged on to it which, depending on the direction of acceleration, would glow up to different combinations of RGB. The Bluetooth device was used to add another great feature of turning the whole circuit on the Skateboard ON/OFF using an application on the users phone.

1. LIGHT-UP SKATEBOARD
Team #5 CISC 340 Project 1

2. ● LSM303
● Reads acceleration and
Magnetic North.
● Powered by 3.3v
● Adafruit_LSM303 library
○ Adafruit_LSM303.h
Accelerometer

3. ● How we tested our compass
● How it works
● Issues along the way
● Other uses for the
accelerometer
Compass

4. NeoPixels
The NeoPixel lights are RGB
LEDs
The lights are very
customizable.

5. LEDs in our project
Flora RGB Smart NeoPixel
version 2 - Pack of 4
We chose the 4 neopixel pack to act as a
compass
Adafruit NeoPixel Digital
RGB
LED Strip - Black 30
To act with the accelerometer data
We connected all of our lights to PIN 6

6. Bluefruit LE - Bluetooth Low Energy
(BLE 4.0) - nRF8001 Breakout - v1.0
Simulates a UART device, which
enables us to send ASCII data
back and forth between the
devices.
Handles all the BLE radio and low level
work, and does it all over SPI which
makes it easy to use with any kind
of microcontroller.
All the needed pins are broken out at
the bottom of the PCB and are 5V
compliant, which enables us to use
it with 3V or 5V micros.

7. Utilizing the SPI pins on
FLORAOur project uses FLORA, which is
Adafruit’s Arduino-Compatible
Wearable Platform.
To our benefit, FLORA also supports
hardware SPI.
This is done by utilizing the SPI pins on
the 2x3 header near the center of
the FLORA board.
We did the same to connect our
Bluetooth device to FLORA. Pins
through the breakouts on the
Bluetooth PCB were connected to
respective pins on the 2x3 header
on the FLORA.

8. Phases of Data Communication
Advertising phase(GAP): In this phase
the BlueFruit seeks out devices
within its broadcast range.
Working phase (GATT): This phase
begins once the BlueFruit has
connected to a central device. In
this phase data is transferred
between the BlueFruit and our cell
phone.
Bluetooth App: BlueFruit LE Connect
is the app developed by Adafruit to
connect to this device.

9. Problems Encountered
⦿ Guides and resources are plentiful but majorly
targeted for advanced users. This forced us to do
an extensive research and have a basic
background knowledge first.
⦿ We received BlueFruit LE later than other
components. This forced us to understand most of
it in theory and delay the testing.

10. FIN