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PIC Battery Charger Team SD May03-05

PIC Battery Charger Team SD May03-05. Abstract.

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PIC Battery Charger Team SD May03-05

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  1. PIC Battery Charger Team SD May03-05 Abstract Many of today's new electronic devices require rechargeable batteries to function. To be practical, a battery charger should support 120V AC, 220V AC, 50-60 Hz or 12V DC car inputs and be portable. Many companies have produced battery chargers that do one or two settings, but very few have all three voltages and current frequencies. Therefore, the team decided to research the current knowledge concerning rechargeable batteries and design a battery charger based on quality and usability principle. Members Clients Design Objectives Richard Musumhi (EE) Pascal Openshaw (CprE) Bo Bo Oo (EE) Chris Privitere (CprE) Prof. John Lamont (Advisor & Client) Prof. Ralph Patterson (Advisor & Client Develop a battery charger that can • Use U.S., European, and vehicle outlet types • Charge batteries intelligently using profiles. Functional Requirements General Background • Use 120V/60Hz, 220V/50Hz, or 12V DC outlets • Detect the fill on batteries • Vary the charging current based on battery details Very few battery chargers are capable of using electrical outlets from the U.S., Europe, and car adapters interchangeably and detecting when to stop charging a full battery. Technical Problem Create a battery charger that can • Use multiple kinds of electrical outlets • Vary the charge based on battery fill Design Constraints Operating Environment Size and weight of the charger must make it easily portable Meant for use inside a house or automobile. Intended users and uses Measurable Milestones Designed for frequent travelers who constantly need charged batteries for portable electronic devices. • Project Definition • Technology Selection • Design Document • Implementation • Demonstration • Documentation Limitations • AA and AAA NiCad and NiMH batteries only • No more than 4 batteries at a time End-Product Description • Capable of charging up to four AAA/AA size NiCad or NiMH batteries • Using either a car adapter or wall outlet from U.S. or European countries • Small and light enough to fit in a travel pouch Cash Budget Sample commercial battery charger Personnel Effort Budget Testing Approach • Power testing - voltage test - current test - charging status test • Usability testing - batteries should not burn out - charging time limit - overcharge and undercharge - discharging

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