Power-Saving Keypad Controls Multiple Keys Through One Mcu Pin

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2007

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Department of Electrical & Electronics Engineering
Department of Electrical and Electronics Engineering (EE) offers solid graduate education and research program. Our Department is known for its student-centered and practice-oriented education. We are devoted to provide an exceptional educational experience to our students and prepare them for the highest personal and professional accomplishments. The advanced teaching and research laboratories are designed to educate the future workforce and meet the challenges of current technologies. The faculty's research activities are high voltage, electrical machinery, power systems, signal and image processing and photonics. Our students have exciting opportunities to participate in our department's research projects as well as in various activities sponsored by TUBİTAK, and other professional societies. European Remote Radio Laboratory project, which provides internet-access to our laboratories, has been accomplished under the leadership of our department with contributions from several European institutions.

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Power-saving Keypad controls multiple keys using bidirectional I/O pin on the microcontroller with resistors and a capacitor. The keypad can save power by charging the capacitor only once for each key press. The microcontroller enters sleep mode and remains asleep until the key is released and the state of I/O changes back to high. It also has the capability to determine the charging time with regulated voltage. The microcontroller starts functioning when a change in I/O's state generates an interrupt. The capacitors also starts charging to the High-state voltage with the changing I/O.

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Electronic Design

Volume

55

Issue

18

Start Page

75

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https://hdl.handle.net/20.500.14411/9213

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