SCIENCE PRODIGY ONLY

Project Simulation:

Once you have designed the circuit, build it and simulate in Multisim using tolerances, and then pass it to your teammate to test it.

Write a test plan and test your teammate’s design. Be sure to demonstrate that the specifications are met below the lower limit, in the normal range, and above the upper limit.

Project Troubleshooting Manual:

You and your teammate should identify one problem that could cause your design to malfunction and write a short step by step process for a technician in the field, starting with the output symptom, to troubleshoot the circuit and identify how to fix the problem. Assume that the problem is not with the power supply (supplies).

Project Deliverable: Report and the multisim design for your project

Each student will submit an individual report. The report should, as a minimum, include the following:

· Title Page (Name, Partner’s name)

· Description of your project (including the specifications you selected)

· Conceptual Design: Explain the block diagram and what each block does (its functionality) and how it works. Also, be sure to explain when one might use an operational-amplifier wheatstone bridge and its advantages.

· Design methodology (show calculations and provide rationale for design choices; remember that your choices must take into consideration commonly available parts).

· Found a deadzone in which no LED is illuminated

·

· MiN Operating temp for "Good" Status; thermistor resistance reads greater than 4,620 ohms

·

· MIN operating point for alarm state; thermistor resistance reads less than 4,590 ohms

·

· Final schematic in Multisim

· Components/Parts list

·

· Simulation results for your design

· Testing process and results for characterization and validation of your teammate’s design – screenshots alone will not suffice. Description of process is required along with discussion of results.

· Utilized automatic fault generation of Multisim tools to generate faults. Utilized Voltage probe to locate unexpected voltages throughout circuit to determine below failure modes.

· If Voltage out of Thermistor circuit is greater than 7mV and system is not in alarm state (Red LED ON) then thermistor is shorted.

· If Voltage out of comparator circuit is ~146mV prior to R1, and 5V after R1 then R1 is open

· If Voltage out of R4 reads 1.45VDC, R5 is open

· Troubleshooting Manual for one potential problem

· Project Challenges: Note any difficulties you faced during the completion of your design and how you overcame them

· Team Interaction Reflection: Describe how you used Blackboard to facilitate interaction, how you worked with one another in the design phase, challenges you encountered, methods you employed to overcome any challenges.

· Teammate Assessment: Use the Project Participation Rubric below and give your teammate a ranking of Needs Improvement, Competent, or Excellent for the first two items in the rubric: Interacts professionally and Plans and organizes team effort. Be sure to justify your ranking.

· Conclusion

· References

· Data sheet for thermistor