System for Engine Location Of a Web Train Paul Wimmer and Adam Weintrop Dr. Irwin and Dr. Schertz 2/13/06

2 Outline Current position on time line Accomplishments of last week Goals for next week

3 Time Line

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

5 Last Week Tested code to interface with multiplexers Tried logarithmic amplifiers to help with hardware Found out that when train is put into “stop” mode, the train is in effect switched out of the circuit, and only current is to power decoder chips

6 Outline Current position on time line Accomplishments of last week Goals for next week

7 Problems to Address for Next Week Finish hardware (comparators, interfacing) Try diode / transistor setup, try to measure current through circuit and switch on transistors based on this current. Testing hardware and software I/O

8 Circuit Idea #1

9 Circuit Idea 2