ECE 135 – The ThreeECE 135 – The Three Presentation 8 Presentation 8

Pat ClearyPat Clearywith Kevin Parker & Bryan Chavezwith Kevin Parker & Bryan Chavez

March 24March 24thth, 2005 , 2005

Work SummaryWork Summary

Received Passives and SMA ConnectorsReceived Passives and SMA Connectors

Updated BudgetUpdated Budget

Corrected Bill of MaterialsCorrected Bill of Materials

Soldered and Tested Board 1Soldered and Tested Board 1

Board 1 TroubleshootingBoard 1 Troubleshooting

Began Midterm PaperBegan Midterm Paper

GANTT ChartGANTT Chart

Project BudgetProject BudgetItem Supplier Part # Qty Unit Price Total Amount

Ferrite Chip Inductor Digikey 490-1034-1-ND 30 $ 0.12 $ 3.60

Power Jack Digikey CP-002APJCT-ND 5 $ 0.81 $ 4.05

POT 1.0kOhm Digikey 3296W-102-ND 5 $ 2.50 $ 12.50

POT 25kOhm Digikey 3296W-253-ND 5 $ 2.50 $ 12.50

Resistor 115 Ohm Digikey 311-115CCT-ND 10 $ 0.08 $ 0.80

Resistor 100 Ohm Digikey 311-100CCT-ND 10 $ 0.08 $ 0.80

Resistor 24 Ohm Digikey RR12Q24DCT-ND 10 $ 0.15 $ 1.51

Resistor 10 Ohm Digikey RR12Q10DCT-ND 10 $ 0.15 $ 1.51

Capacitor 10000 pF Digikey PCC103BNCT-ND 100 $ 0.04 $ 3.66

SMAs Jameco 901-143-6RFX 10 $ 4.20 $ 42.00

2.5 Gbps ROSA Advanced Optical Components HFD3180-103 4 $ 10.00 $ 40.00

2.5 Gbps VCSEL Advanced Optical Components HFE419x-541 4 $ 14.50 $ 58.00

PCB Board Fab Express PCB   2 $ 59.00 $ 118.00

Shipping and Miscellaneous Various       $ 25.94

Total         $ 324.87

Corrected Bill Of MaterialsCorrected Bill Of Materials

Product Vendor Item Number Qty Large Qty Price ($) Total Amount ($)

POT 1.0K OHM Digikey 3296W-102-ND 1 1.092 1.092

POT 25.0K OHM Digikey 3296W-253-ND 1 1.092 1.092

RES 115 OHM Digikey 311-115CCT-ND 2 0.01682 0.03364

RES 100 OHM Digikey 311-100CCT-ND 2 0.01682 0.03364

RES 24 OHM Digikey RR12Q24DCT-ND 1 0.02958 0.02958

RES 10 OHM Digikey RR12Q10DCT-ND 1 0.02958 0.02958

CAP 10000 PF Digikey PCC103BNCT-ND 18 0.01888 0.33984

CONN PWR JACK Digikey CP-002APJ-ND 1 0.40338 0.40338

Ferrite Bead Inductor Digikey 490-1034-1-ND 5 0.064 0.32

VCSEL AOC HFE419x-541 1 7.25 7.25

ROSA AOC HFD3180-103 1 5.00 5.00

Laser Driver Chip Maxim MAX3287 1 4.00 4.00

Limiting Amplifier Chip Maxim MAX3264 1 4.00 4.00

PCB Board Express PCB 4 Layer Board 1 5.7195 5.7195

Total         $ 29.34

Board 1 ConstructionBoard 1 Construction

Initial Board 1 TroubleshootingInitial Board 1 Troubleshooting

No Success with Tx or RxNo Success with Tx or Rx

High-Pitched Noise and a Smoking Ferrite High-Pitched Noise and a Smoking Ferrite Bead…Good? (We’re Thinking No)Bead…Good? (We’re Thinking No)

Short Discovered Between Power Supply and Short Discovered Between Power Supply and Ground (Not from Layout)Ground (Not from Layout)

Power Supply QuestionsPower Supply Questions

Board 1 Construction – Take 2Board 1 Construction – Take 2

The Three’s Tried-and-True Strategy: Start OverThe Three’s Tried-and-True Strategy: Start Over

Results: Nothing Breaks During Testing!!!!!Results: Nothing Breaks During Testing!!!!!

Transmitter TestingTransmitter Testing

Left and Right Inputs Left and Right Inputs to VCSELto VCSEL

Signals Want to Be Signals Want to Be Eyes… Not Quite Eyes… Not Quite ThereThere

VCSEL Not LasingVCSEL Not Lasing

Receiver TestingReceiver Testing

ROSA Output is Desirable EyeROSA Output is Desirable Eye

No Output From Limiting Amplifier No Output From Limiting Amplifier

Limiting Amplifier Extremely Hot at FirstLimiting Amplifier Extremely Hot at First

Troubleshooting ConclusionsTroubleshooting Conclusions

Disastrous First Attempt at Board 1Disastrous First Attempt at Board 1

No Shorts in Current BoardNo Shorts in Current Board

Problem Could be a Design Issue or a Problem Could be a Design Issue or a Component ProblemComponent Problem

Possible Theory for Receiver: Maxim Chip Possible Theory for Receiver: Maxim Chip Overheated and is Toast?Overheated and is Toast?

Future WorkFuture WorkFinish Midterm ReportFinish Midterm Report

Continue Troubleshooting Board 1Continue Troubleshooting Board 1

Purchase Rabbit’s FootPurchase Rabbit’s Foot

Avoid Ladders and Black CatsAvoid Ladders and Black Cats

PrayPray