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Build a Hand-Held MCU-Based Scoring Device
By Paul Kiedrowski

The QuizWiz is an innovative hand-held device that teachers can use to score multiple choice tests. It's unlikely that you'll need such a device, but you'll surely learn a lot from Paul Kiedrowski's description of the design process. He covers the circuit design, hardware analysis, software, and more. Kiedrowski writes:

I developed a hand-held scoring device based on an 8-bit microprocessor I dubbed QuizWiz. The 87LPC764 is a new 20-pin offering that combines fast speed, 8051 code compatibility, and low cost. This processor is ideally suited for this project because of its 4K code space, power-saving modes, serial port, and remaining 16 I/O pins. Philips wanted to create a device simple to operate and affordable enough that every teacher could own one.

QuizWiz has several features that make the teacher's ability to score multiple-choice quizzes fast and easy. It reduces scoring time to only 10-15 s per page. It is capable of scoring tests printed on standard paper without preprinted forms, using a word-processing template. Continue Reading & Download
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Circuit Cellar #303 October 2015

Signal Processing Solutions | DIY Footlight Project | Room Acoustics Analysis | Battery Operation | Transformer Design | FPGA Design in Python | Connect Wirelessly with an MCU | Tips for Selecting an Op-Amp | X-10 and Beyond | The Future of Commodity Hardware Security | And More

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