ECE 477 Final Presentation Team 8

Spring 2013

Left to Right : Fabian Widyadri, Siddharth Bhosale, Vineeth Harikumar, Sriram

Rangaramanujan

Outline

• Project overview

• Block diagram

• Design challenges

• Individual contributions

• Project demonstration

• Questions / discussion

Project Overview

• Printer power management system

• Use the power indicator LED as a light sensor

• Control printer's power based on light levels

• Route incoming print jobs to local storage/printer

Block Diagram

100 ohms LED

uSD Card

Power Relay

110VAC

Amplifier CircuitPIC32MX795F512HMicrocontroller

5VDC2

RPG

4

LCD Display

16

3

?SM Power Supply (to all components)

110VAC

3

6USB

H-bridge

4

Design Challenges• Developing LED sensing mechanism

• Experimented with various sensing techniques

• Developing a custom microSD card driver to handle individual data packets and I/O in blocks to the microSD card• Incorrect traces on PCB found after lot of

debugging

• Creating a reliable and safe high-voltage (110VAC) control solution

Individual ContributionsVineeth Harikumar

• Overall software design for all the drivers

• PCB design and debugging

• Prototyping the different components

• Hardware + Software interaction

Individual ContributionsSiddharth Bhosale

• Schematic and PCB design

• Hardware prototyping and PCB population

• LCD menu and RPG integration

• System Integration and Packaging

Individual ContributionsSriram Rangaramanujan

• Schematic Development

• PCB design and component population

• LED Sensing

• Overall hardware development

Individual ContributionsFabian Widyadri

• QA on the PCB and schematic design

• Developed LCD driver

• Developed microSD driver

• Hardware and software interaction

Project-Specific Success Criteria

• An ability to detect change in light in a room with an LED

• An ability to control the printer’s power state and display it via an LCD on the detection of change in light

• An ability to accept incoming print jobs and queue the jobs up using local memory while printer is in sleep mode

• An ability to wake up printer and forward the queued up print jobs using standard protocol

• An ability to control and set the various timeout options for the printer’s sleep and hibernate states based on user input

Questions?