System for Engine Location Of a Web Train Paul Wimmer and Adam Weintrop Dr. Irwin and Dr. Schertz 11/21/05

2 Outline Current position on time line Accomplishments of week 4 Goals for week 5

3 Time Line

4 Outline Current position on time line Accomplishments of week 4 Goals for week 5

5 Week 4 Designed hardware to use the “2-bit” method Found new power supply Sent code to track and saw train lights come on Software flow charts

6 “2-bit” Method Because the software only needs to determine 3 train states 0 0 Train off track 1 0 Idle state 1 1 Train running

7 Current Sensing Methods MethodProsCons “2-bit” “2-bit” method can be designed cheap enough to have the A/D on every track segment, this reduces analog related problems Cannot determine # of trains 8-bit with variable range Built in the microprocessor board, # of trains Requires more software 10-bit Can determine # of trains and # of cars Expensive

8 Hardware Design

9 Software Design

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18 Outline Current position on time line Accomplishments of week 4 Goals for week 5

19 Problems to Address for Next Week Get Train to run with software control Build hardware Begin writing code for current sensing