ECE4006 Senior Design Project

Linda Milor and Jay Schlaglinda.milor@ece.gatech.edu

jhs@ece.gatech.edu

Project Inputs

LevelConverter

Parallel Digital Inputs

If the components do not use compatible voltage and current levels:

If you need to interface to more inputs than allowed for your processor:

MUX

Signals

Synchronous Digital

Data

Asynchronous Digital

Analog

Clock

Pulse Generation

ComparatorIn

Out

Isolation

+5v

Relay

LED Photo Transistor

Processor

+110v

motor

Optical Isolator

Processor

Analog to Digital Converters

AnalogDigital

Converter

Start

End of Conversion

Slope Converter

Input

Slope

Time

Voltage or

Current

1. Slow2. Expensive3. Not Sensitive to Noise4. Accurate5. Large

Application:Digital VoltmeterTemperature Meter

Approximation Converter

Input

Time

Voltage or

Current

1. Medium Fast2. Cheap3. Sensitive to Noise4. Medium Accurate5. Small

Application:General Purpose

Flash Converter

1. Very Fast2. Very Expensive3. Sensitive to Noise4. Not Accurate5. Small

Application:Extreme High Frequency

Comparator

Comparator

Comparator0.75Vdd

0.5Vdd

0.25Vdd

Project Outputs

LevelConverter

Parallel Digital Outputs

If the components do not use compatible voltage and current levels:

If you need more outputs,i.e. if you are using multiple processors:

Register Bank

Register Bank

Strobe

Strobe

Signals

Synchronous Digital

Data

Asynchronous Digital

Analog

Clock

Isolation

+5v

Relay

LED Photo Transistor

Processor

+110v

motor

Optical Isolator

Processor

Driving LoadsV

Drive Transistor

Load

V

Drive Transistor

Inductive Load

Speed Control

Fast

Slow

Driving Motors – Bidirection Dual Power Supply

Drive Transistor Drive Transistor

+V -V

Driving Motors – Bidirection Single Power Supply (H Bridge)

V

Driving Motors – Bidirection Single Power Supply (H Bridge)

V

On

On

Off

Off

VOn

On

Off

Off

Stearing Motors – Bidirection Single Power Supply (H Bridge)

V

Spring

Spring

Digital to Analog Converters

DigitalAnalog

Converter