iLab

Final PresentationEE 496

May 4, 2007

Members

• Ka Hing Chan– Male– Age 21

• Nana Kim– Female– Age 22

• Chong Quach– Female– Age 40

Overview of Project

• Objective: to design an affordable and space efficient all-in-one laboratory device.

• Device will include:– Power Supply– Function Generator– Oscilloscope– Spectrum Analyzer– DMM

Initial Goals

• Build Generator portion– Provide adjustable DC power ranging from -20V to

+20V– Generate sine, square, triangle waves w/

adjustable frequency and amplitude (10 Vpp max)

• Push buttons to adjust features to test accuracy and precision

Overall Design

Decisions Made

• Number of outputs– 5 DC outputs (2 fixed pos and neg ports, 1 GND)– 2 Analog wave outputs

• Direct Digital Synthesizer (AD9833) vs. PSoC• Transformer vs. DC-DC converter• Buy C Compiler vs. Free Assembly Code

Structure (Generator)USB

SPI

Analog Waveform

DC

PSoC(CY8C29xxx)

DDS(AD9833)

Positive

Positive

Negative

Negative

USB Host/ClientMAX3421E

DDS(AD9833)

Design Tools

PSoC DesignerPCB Express

Current Status

• Received all chips• Completed circuit design• Setup SPI in PSoC Designer

Problems

• Time!!!!!• Limited Resources• PSoC Assembly Language• Lack of $$$$

– C Compiler = empty wallet– PCB Boards = arm + leg– Error in PCB Boards = Incomplete Grade

To Do List

• Re-order PCB boards• Test Chips• Design command procedure and language

Future Improvements

• More time in development stage– Explore options before committing

• Better time management– Follow and commit to timeline

• Use Design Notebook– Makes writing paper easier

Have a Great Summer!!!!

Questions?