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Com fuel-injection controller or a dashboard computer system that displays the actual revolutions per minute. WAR STORIES This project was the result of many attempts, some exploring, a lot of tests and mistakes, and the incremental process of development. As every developer knows, you encounter many interesting (and funny) events during the development process, especially if you do tests with something as simple as a car engine. Let me tell you about two events that occurred while I was developing this ignition system.

You can see the preliminary curve in Figure 5. This curve is stored in EEPROM and program memory. The latter is provided in case a mistake is made during the tuning process. You can restore the EEPROM data to the original curve using the 8 command. Restart tuning again from the beginning without reprogramming the EEPROM in the device programmer. For curve tuning, it’s good to have the knock sensor connected. If you do not have one, you must be careful when adjusting the ignition timing. You should listen to the engine’s sound after each adjustment step.

In most cases, no emergency exists. Pagers still play an important role in situations when personal contact isn’t required. In this project, Kevin Ferguson (kpf1@cornell. edu) used multiple Atmel AT90S8515 microcontrollers to create a server/ receiver paging system (see Figure 5). Messages created through a browser are processed by a JAVA servlet and sent to the Atmel server connected to the PC’s serial port. The micro handles message traffic and time of day (TOD). The hardware UART supports Photo 1—It isn’t exactly portable, but this prototype version of BiLines can be played.

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