There are two parts to me. There is the part that wants to get out and exercise， and then there is the engineer who would rather build gadgets to help improve my exercise. With the Tour de France as my goal， I decided to use the MAXQ2000 to build a battery-powered bike monitor. To improve my performance on the bike， I needed a speedometer， clock， thermometer， humidity sensor， heart-rate monitor， and a stopwatch. The MAXQ2000 has all the right tools to solve this problem. The MAXQ2000‘s LCD controller supports up to 132 segments， which is far more than I needed for this application’s display. I used the MAXQ2000‘s real-time clock （RTC） to track the current time and run my stopwatch. A DS1923 Hygrochron iButton managed my ［1］ ［2］ humidity and temperature measurements. （See Appendix 1 for more information on the DS1923 Hygrochron iButton.） The two remaining bike monitor functions—measuring the bicycle’s speed and measuring my heart rate—were more interesting （and difficult）。

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