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