SPARKLE

Members:Jefferson AhnLangtian LangMogeng LuShang-Wei Wang

STATUS UPDATE

Project Idea: LED jump rope. Status:

It will light up LEDs based on information from an accelerometer; displaying text will come with testing.

Initial goals will be light LEDs as a counter, then we will attempt to display text.

Parts: MiniPOV – handheld kit to display text with LEDs Atmega88 – to replace kit microcontroller for added

A/D converter ADXL330 – accelerometer LED jump rope – for the housing ideas

ATTINY2313-20PI Microcontroller

ADXL330 Accelerometer

LEDs

ARCHITECTURE

Idle

Indicator LED turns on,

LED rope turns on for 3 seconds

Sensor detects acceleration

Leds turn on based on

sensor output

Indicator LED turns off

User presses on button

User Jumps

User presses off button

USE CASES

Normal: User > Power On (indicator on) > Jumps >

Obtains information from LEDs > User > Power Off (indicator off)

Timeout: User > Power On (indicator on) > No

acceleration detected (for 30 secs) > Power Off (indicator off)

Broken LED: User > Power On (indicator on) > Startup check

> User > Power off (indicator off)

RISKS & MITIGATION

Risks Mitigation

Weight -Batteries will be the heaviest-Use fewer batteries-Looking into self generating power

Broken LED(s) -After testing determine quantity of spare LEDs per unit/amount of protective casing on the rope to minimize this from happening.-Return for repair.

Malfunctioning (incorrect output data)

Send in for repair/replacement under “warranty”

Battery Life -Include dimmer for longer lasting-Looking into self generating power

Physical side effects (headache/dizziness/etc.)

Supply unit with general warnings.