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Team #6: Transistor/Diode Curve Tracer

Team #6: Transistor/Diode Curve Tracer. Brian Gallert John Edwards Karl Silge. BSEE BSEE BSEE. Team #6: Expertise & Experience. Brian Gallert John Edwards Karl Silge. Expertise: Electronics, Power Systems Experience: 3 Co-op Semesters @ GE Consumer/Industrial

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Team #6: Transistor/Diode Curve Tracer

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  1. Team #6: Transistor/Diode Curve Tracer • Brian Gallert • John Edwards • Karl Silge • BSEE • BSEE • 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 years @ Bucyrus as ME

  3. Transistor/Diode Curve TracerDescription • 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 TracerExternal 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 TracerInternal Block Diagram of Curve Tracer Digital Functions Analog Functions Current Source Signal Processing microprocessor User Interface Power Supply John Karl Brian

  7. 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 System – Perf Reqs:

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

  9. 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 System - Std Reqs: Env & Safety • 10Co - 50Co • 10 – 70 Rh% • Sea level – 4000m • 10Co - 50Co • 0 – 80 Rh% • Sea level – 4000m • 3 Years

  10. Energy Source List Source Connection List Min Operating Voltage Range Max Power Consumption Max Energy Consumption System - Std Reqs: Power Interfaces • 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/$400 = 38.75% • Calculate the Annual CM$ = 38.75% X $1M = $387,500 • Calculate the ROI Time in Years = $60,000 /$387,500 = .155 years

  13. Safety Standards Adhered to Canadian Stds. Association CSA 1010.1:1992 CSA 22.2 :950 Underwriters Labs UL 3111-1:1994 UL 61010B-1:2003 UL 1950 System - Std Reqs: Safety

  14. EMC Standards Adhered to EN61000-6-2 (Level C) IEC61000-4-2 (ESD immunity) IEC61000-4-5 (Surge immunity) IEC61000-4-11 (Voltage dips, short interruptions, variations) System - Std Reqs: EMC

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

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

  17. 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 User Interface Description

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

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

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

  24. 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 User Interface Prototyping Plan

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

  26. 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 Microprocessor Description

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

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

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

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

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

  36. 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% Power Supply Description

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

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

  39. Power Supply Power Interface

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

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

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

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

  44. 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 Analog Devices Description

  45. 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 Analog Devices Perf Requirements

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

  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

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