1. Team #6: Transistor/Diode Curve Tracer
Brian Gallert
John Edwards
Karl Silge
BSEE

2. Team #6: Expertise & Experience
Brian Gallert
John Edwards
Karl Silge
Expertise: Electronics, Power Systems
Experience: 3 Co-op Semesters
@ GE Consumer/Industrial
Expertise: Solar/Renewable Energy, Controls, electrical test equipment
Experience: USAF, Tektronix, Northrop
(Testing and Repair)
Expertise: Electromagnetics, Electronics
Experience: 5 Bucyrus as ME

3. Transistor/Diode Curve Tracer Description
Trace electrical characteristics for
Any two terminal device
Resistors
Diodes
BJTs
NPN
PNP
FETs
JFET
MOSFET
User Interface for customized analysis

4. Transistor/Diode Curve Tracer
Features
User Interface
Select base current increment
Switch between two different devices under test
Functions
Collector Voltage sweep 0-30 VDC
High range to view breakdown characteristics

5. Transistor/Diode Curve Tracer External Interfaces
PNP, NPN, diode plug in
Curve Tracer
User input settings
Current Range
Voltage Range
Device Type
Oscilloscope
120 VAC outlet

6. Transistor/Diode Curve Tracer Internal Block Diagram of Curve Tracer
Digital Functions
Analog Functions
microprocessor
Current Source
Signal Processing
User Interface
Power Supply
John
Karl
Brian

7. System – Perf Reqs: Mechanical Characteristics of user interface
Toggle Switches
Rotary dials
BNC male coaxial cable to oscilloscope
Operation modes
ON/OFF
Testing for:
two terminal devices
three terminal devices
Safety
Current limiting of 150 mA to user
Fuse for instantaneous trip time
Max potential of user surfaces of 30V

8. System – Perf Reqs: Electrical Interfaces
Signal Type
Analog
Signal Direction
Input
Basic Analog Characteristics
120 VAC
150mA
60Hz
25 W

9. System - Std Reqs: Env & Safety
Min Operating Temp Range
Min Operating Humidity Range
Min Operating Alt or Press Range
Min Storage Temp Range
Min Storage Humidity Range
Min Storage Alt or Press Range
Max Storage Duration
10Co - 50Co
10 – 70 Rh%
Sea level – 4000m
0 – 80 Rh%
3 Years

10. System - Std Reqs: Power Interfaces
Energy Source List
Source Connection List
Min Operating Voltage Range
Max Power Consumption
Max Energy Consumption
120 VAC
Temporary
102V – 132V
25 Watts Total
7500 Watt-Hours/Yr

11. System - Std Reqs: Mechanical
Max Volume
Max weight
Electrical I/F Connector(s)
Max # of PC Boards
Max PCB Circuit Area
10” x 8” x 3” = 240 in3
10 lbs
BNC connectors 5
80 in2

12. Basic Business Case
Estimate the Average Product Selling Price (ASP$): $400
Estimate the Product Annual Sales Volume: 2500
Estimate the Per Unit Cost of all Parts and Materials using the above annual volume assumption: $100
Estimate the Per Unit Cost of all the Assembly, Test and Mfg using the above annual volume assumption: $120
Estimate the Total Development Cost in $ incl Labor+Material: $60,000
Calculate the Annual Sales $ = $400 x 2500 = $1M
Calculate the Per Unit CM$ = $400 – $245 = $155
Calculate the CM% = $155/$400 = 38.75%
Calculate the Annual CM$ = % X $1M = $387,500
Calculate the ROI Time in Years = $60,000 /$387,500 = .155 years

13. System - Std Reqs: Safety
Safety Standards Adhered to
Canadian Stds. Association
CSA :1992
CSA 22.2 :950
Underwriters Labs
UL :1994
UL 61010B-1:2003
UL 1950

14. EMC Standards Adhered to
System - Std Reqs: EMC
EMC Standards Adhered to
EN (Level C)
IEC (ESD immunity)
IEC (Surge immunity)
IEC (Voltage dips, short interruptions, variations)

15. Team 6: Team members with assigned blocks
Brian Gallert
User Interface
Microprocessor
Karl Silge
Power Supply
John Edwards
Analog Devices
Current Generator
Signal Processing

16. User Interface Digital Functions Analog Functions Power Supply Brian
microprocessor
Current Source
Signal Processing
User Interface
Power Supply
Brian

17. User Interface Description
Functions
Toggle Switches
On/Off
Select between devices Left or Right
BJT or FET
P-channel or N-channel
Rotary Dials
Collector Voltage range 0-30
Base Current or Gate Voltage increments five different increments all by log scale
5 different series resistances to limit collector current
Possible Features
Rotary dial to adjust collector current
DIP switch to select number of base current steps

18. User Interface Perf Requirements
User Inputs
Base Current or Gate Voltage Increment
Rotary dial
Five different increment options
Device Type
Four different device options
Polarity of Device
Collector Voltage range
Series current limiting resistor
Operational Modes
ON/OFF
LED indicator

19. User Interface Std Requirements
Power
5 VDC source
Min 4.5
Max 5.5
Connection
Permanent
Power consumed 2 W
Size
475 cm3
95cm2 PCB

20. User Interface Power Interface

21. User Interface Digital Interface

22. User Interface Block Diagram
120 VAC
To System
ON/OFF
Push Button
5 VDC
Polarity
Switch
Base Current/ Gate Voltage Rotary Dial
Left/Right
Switch
Device
Rotary Dial
To System
To Microprocessor
Collector Volts
Rotary Dial
Current scaling
Rotary Dial
Series Res.
Rotary Dial
# of Steps
Rotary Dial

23. User Interface Task-Resource Estimate
Prototype
Time of assembly and testing – 15 hours
Completed by April 30
Total Estimates
Total Material Estimated
$41
Total Manpower Estimated
37.3

24. User Interface Prototyping Plan
Block Area
180 cm2
Total PCB Area
90 cm2
PCB Substrate Type
Pre-perforated fiberglass
Component Attachment Type
Direct Solder
Socketed Components
Solid wire solder connection
Types of Connectors
AMP connector

25. Microprocessor Digital Functions Analog Functions Power Supply Brian
Current Source
Signal Processing
User Interface
Power Supply
Brian

26. Microprocessor Description
PIC16F876 with external clock
Functions
Decode user interface inputs
Time the base current increments to voltage sweeps
Change base current to gate voltage when testing a FET vs. a BJT
Change increments on Base Current to User input

27. Microprocessor Perf Requirements
User Inputs
Base Current Increment
Rotary dial
Five different increment options
Device Type
Three different device options
Operational Modes
ON/OFF
LED indicator

28. Microprocessor Std Requirements
Power
5 VDC source
Min 4.5
Max 5.5
Connection
Permanent
Power consumed 2 W
Size
475 cm3
95 cm2 PCB

29. Microprocessor Power Interface

30. Microprocessor Digital Interface

31. Microprocessor Analog Interface

32. Microprocessor Block Diagram
5 V
Base Current/ Gate Voltage Rotary Dial
To Counter
PIC 16F876
To Vref polarity
Device
Rotary Dial
NPN or PNP
Voltage or Current
Current scaling
Rotary Dial
To IC scaling
To Current Source
# of Steps
Rotary Dial
From User Interface
Clock

33. Microprocessor Prototyping Plan
Block Area
90 cm2
Total PCB Area
PCB Substrate Type
Etched fiberglass
Component Attachment Type
ZIF Socket
Socketed Components
Processor
Type of Connector
AMP

34. Microprocessor Task-Resource Estimate
Prototype
Time of assembly and testing – 25 hours
Completed by April 30
Total Estimates
Total Material Estimated
$21
Total Manpower Estimated
48.3

35. Power Supply Digital Functions Analog Functions Power Supply Karl
microprocessor
Current Source
Signal Processing
User Interface
Power Supply
Karl

36. Power Supply Description
Characteristics
Input – 120 VAC
Outputs
5 VDC
+15 VDC
-15 VDC
Full Rectified Wave 30 V peak to zero
Features
Isolation transformer
Voltage Regulation to 10%

37. Power Supply Perf Requirements
User Inputs
Push Button
ON/OFF
Red LED Indicator for ON/OFF
Operational Modes and Features
10% Voltage Regulation

38. Power Supply Std Requirements
120 VAC source
Min 102
Max 132
Connection
Temporary (only during use)
Power consumed 20 W
Size
475 cm3
95 cm2 PCB

39. Power Supply Power Interface

40. Power Supply Block Diagram
collector
xfmr
+15V
op amps
xfmr
regulator
-15V
xfmr
regulator
+5V
digital
bridges

41. Power Supply Prototyping Plan
Block Area
90 cm2
Total PCB Area
PCB Substrate Type
Etched fiberglass
Component Attachment Type
Direct Solder
Socketed Components
Solid wire solder connection
Types of Connectors
AMP connections

42. Power Supply Task-Resource Estimate
Prototype
Time of assembly and testing – 30 hours
Completed by April 28
Total Estimates
Total Material Estimated
$150
Total Manpower Estimated
112

43. Analog Devices Digital Functions Analog Functions Power Supply John
microprocessor
Current Source
Signal Processing
User Interface
Power Supply
John

44. Analog Devices Description
Functions
Base Current Source for BJTs
Gate Voltage Source for FETs
Scales and filters signals to oscilloscope
Features
BNC connectors to oscilloscope
High SNR above 50 dB

45. Analog Devices Perf Requirements
User Inputs
Toggle Switch for polarity for
N-channel
P-channel
Five position rotary dial for
Base current increments on log scale starting at 10uA
Gate voltage increments on log scale
Operational Modes and Features
BJTs or FETs
High SNR of 50 dB
BNC connectors for direct connection to oscilloscope

46. Analog Devices Std Requirements
Power
+/-15 V DC for op amps
+5V DC
Connections
Permanent
Power consumed 1 W
Size
475 cm3
95 cm2 PCB

47. Analog Devices Power Interface

48. Analog Devices Digital Interface

49. Analog Devices Analog Interface

50. Analog Devices Block Diagram
Voltage Source VC
Polarity SW
From Micro
Current Limiting
Resistance VC X
Counter
L/R SW
To Oscilloscope
Scaling and Current Conversion Op Amp
Left
D.U.T.
Right
D.U.T.
D to A Converter IC Y
Vref

51. Analog Devices Prototyping Plan
Block Area
90 cm2
Total PCB Area
PCB Substrate Type
Etched Fiberglass
Component Attachment Type
Direct Solder
Socketed Components
Solid wire solder connection
Types of Connectors
AMP connections

52. Analog Devices Task-Resource Estimate
Prototype
Time of assembly and testing – 40 hours
Completed by April 28
Total Estimates
Total Material Estimated
$60
Total Manpower Estimated
116.1

53. Overall High Level Package Description
External Enclosure
Plastic Box 10” by 7.5” by 3”
Connections
Plug Type B
2 male BNC connectors
Internal
Four PCBs each 2.5” by 6”
Total of 15 sq inches of board space

54. Team Resource Capability vs. Project Resource Estimations
Team Capabilities
$350
400 Man-hours
Resource Estimations
$282
428.7 Man-hours
Percentages used
Dollars
80.5%
Man-hours
107.2%

55. Overall Program Plan Gantt Chart