White Paper - Capstone Experience - Texas A&M University

More documents

Recommendations

Info

| 10/15/2007 CLASSIC COMFORT “Merging the past with the present” The functional layout of our system is centered on the PIC18F microcontroller. The microprocessor will be powered using the existing car battery through a 12V to 5V filter circuit. This filter circuit will be designed to filter any fluctuations or noise that may appear on the microprocessor power line. Next we have the ignition switch, door switch, and headlight switch which are connected through current detection circuits to the microprocessor. These current detection circuits will allow the microprocessor to detect the status of these switches, whether on or off, and process that signal according to the software implemented in the microprocessor. The modern functions we will be implementing in our product will include a dome light delay, headlight delay, radio delay, and daytime running headlights. A kill switch will also be added in our design that will provide basic user security. The dome light delay will be controlled by the status of the ignition and door switches as seen by the microprocessor. Based on the status of these switches, the microprocessor will determine the proper action to take and its output will be connected to an accessory power circuit which will act as a line-driver to power the dome light delay circuit. Similarly, the radio delay, headlight delay, and daytime running headlights will also be controlled by the status of one or more of these switches. A dual seven segment display and a three button user interface will allow the user the functionality of adjusting the delay settings of a particular function or turning a feature on or off. 5
| 10/15/2007 CLASSIC COMFORT “Merging the past with the present” WORK PLAN In this section we identify the work that needs to be done. We take a look at the project overall and identify the main phases which will be associated with the project. By taking these phases and breaking them down further into activates, tasks, and even subtasks, every aspect of the project can be identified. The WBS for our project is divided into six phases. Figure 3 shows the phase level of the Classic Comfort project. The phases for the completion of our project include Research, Hardware Design, Software Design, Testing, Fabrication, and Documentation. Figure 3. Work Breakdown Structure Research Research will be conducted at the beginning of the project. It will be conducted mostly in current limiting circuits, noise filtering, Painless wiring harnesses, microcontrollers, dual seven segment displays, and size constraints. Hardware Design The basic hardware design of our product will include connection to most existing wiring harnesses in classic cars and also full integration with Painless Performance wiring harnesses. Our design will contain regulated power from the existing car battery connected through a protection circuit to the microprocessor and dual seven segment display. We will also implement three current detections circuits that will be connect to the headlight, door, and ignition switches to obtain the status of these switches to be input to the microprocessor. The output of the microprocessor will then be connected through an amplification circuit, to a particular function, i.e. headlight delay, radio delay, etc. which will drive the function according to switch status and software design of the microprocessor. Software Design The software code will be written to command the microcontroller to perform various tasks. Software codes will monitor the voltages and control timing and levels of voltage output from the device. It is important that the software be robust, extensible, fault-tolerant, secure, and maintenance must be easy. These goals will be met in the software design. 6
Page 1 and 2: “Merging the past with the presen
Page 3 and 4: | 10/15/2007 CLASSIC COMFORT “Mer
Page 5: | 10/15/2007 CLASSIC COMFORT “Mer
Page 15: | 10/15/2007 CLASSIC COMFORT “Mer

White Paper - Capstone Experience - Texas A&M University

Create successful ePaper yourself

Delete template?

Save as template?