UW-Madison CHEM 628 - Lab 3 Microcontroller (52 pages)

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Lab 3 Microcontroller



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Lab 3 Microcontroller

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Lecture Notes


Pages:
52
School:
University of Wisconsin, Madison
Course:
Chem 628 - Chemical Instrumentation: Design and Control Applications
Chemical Instrumentation: Design and Control Applications Documents

Unformatted text preview:

Chemistry 628 University of Wisconsin Madison LABORATORY UNIT ON MICROCONTROLLERS AND FEEDBACK AN INTRODUCTION A microcontroller is a mini computer on a single highly integrated chip It contains many of the parts that typically make up a computer a CPU ROM for program storage RAM for data storage timers and I O ports for peripherals all on one chip It is different from a microprocessor also a highly integrated chip which serves as just the CPU the heart of any computer Memory and peripherals are external to a microprocessor A microcontroller has less memory and a much slower CPU than your desktop computer but it is also much less expensive They cost about 5 to 10 Microcontrollers don t need all the speed and memory that your computer has They are designed and programmed to perform a specific well defined task as opposed to the myriad of tasks that your computer performs Microcontrollers are ubiquitous They are found in countless consumer products such as automobiles digital cameras cell phones microwave ovens and digital clocks to name a few They are typically embedded in these larger systems to control something such as anti lock breaks in an automobile or an alarm on a digital clock As scientists we are interested in what they can do for us in the laboratory such as controlling the temperature of an incubator or adjusting the flow of reactants to a process Look around in your laboratory and you will probably see various instruments with push buttons and digital displays all with embedded microcontrollers Complex scientific instruments or consumer products may contain several microcontrollers each with a different function Figure 1 shows a few products that contain some kind of embedded controller Figure 1 Consumer products and scientific instruments that use embedded microcontrollers This Laboratory Unit on Microcontrollers and Feedback is designed to help you learn about the various features of microcontrollers and how to program them to provide feed back and



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