EE - 286 Project 1 Teams

To:	EE - 286 Project 1 Teams
From:	Professor Sharber
Date:	Sept 7, 2017
Subject:	Project 1: Deliverable 3, Transducer Choice

Yesterday, our sales team, along with several engineers, met with the thermometer project client. They were successful in obtaining a few more general specifications for the thermometer. We still do not have sufficient information to develop a full set of engineering requirements, but there is enough new information to proceed with the design. The new information is:

- the thermometer must have a range of 0-150°F

- the thermometer should be accurate to ±2C°

- the Arduino Uno will be used in this project

The information previously available:

- be able to measure normal temperatures

- not too big, maybe fit in a shoebox

- must be controlled with a micro processor

- have some visual display of the temperature

The teams may draw on the available supplies to work on their designs. (Parts supplied by the team must be approved for this project.) The customer has indicated he would like to see prototypes demonstrated on the 21st or possibly the 26th of September.

Deliverable:

The teams must choose a temperature transducer from the list below. Create a pairwise matrix and a decision matrix to guide your choice. The pairwise matrix must have at least four criteria and you must choose from at least four of the transducers available.

The assignment is due Monday, Sept 11 at 10:00Pm but may be submitted any time without a late penalty. The teams will not be given a transducer until this assignment is completed satisfactorily. The Arduino kits may be available on Tuesday, Sept. 12.

Temperature Transducers available:
TMP04	B57164K103J	LM335
LM34	LM334	AD 592
TMP37	LM61

Guidelines for the Transducer Memo:

1. Use the memo format provided in Bb Learn

2. Introductory paragraph

3. Bullet list of the criteria used in the pairwise matrix with a short (one or two sentences) explaining why this criteria is important., minimum of four criteria

4. The pairwise matrix

5. Summary of the pairwise matrix

6. Bullet list of the transducer considered with a brief description of each one (four minimum)

7. The decision matrix

8. Summary of the decision matrix

9. Summary

Note: If you use the cost of the transducer as a criteria in your decision matrix:

· Lookup the cost from somewhere on the internet for 10 pieces (Digikey, Mouser, Allied Electronics, Newark, etc.)

· Be sure the device is in the TO-92 package

· Report the cost and the source (vendor and vendor part number) in an appendix to the memo

· A good way to incorporate the cost into the decision matrix is to normalize the cost of the different devices. Or you could just assign the value of 1 to the most expensive and 5 to the cheapest, or something similar. If you normalize the cost correctly, I will award the team five bonus points on the assignment. (Study slides 12, 13 and 17 in the Appendix B PowerPoint.)

2