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Autonomous programmer of AVR microprocessors with Ethernet connectivity
Verner, Lukáš ; Daněček, Vít (referee) ; Kravka, Martin (advisor)
he main purpose of this semestral thesis is to get to know programming of Atmel AVR microcontroller, working with SD/MMC cards, working with ethernet (TCP/IP) to create a standalone programmer of AVR microcontroller with ethernet connectivity. The first part deals with the questions of programming theory of memories inside microcontrollers and description of programming algorithm. The most used programming method is called „In System Programming“ - ISP. This method provides easy and fast manipulaton. Concept of this programmer is designed for this ISP method. In this thesis is too explain how to work SD/MMC card and file systém FAT16. This knowledges are necesary to store binary program inside standalone programmer. In final part and in attachments there is hardware design, electrical scheme, bill of materials, printed circuit board.
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Compact datalogger with flash memory
Vágner, Martin ; Hynčica, Ondřej (referee) ; Bradáč, Zdeněk (advisor)
This thesis deals with design of small datalogger with flash memory card. At first are discussed parameters, functions and features of dataloggers. The second part deals with a problem of digital measurement of analog signals. The rest of this thesis gives attention to main goal which is design of datalogger. It consists of circuit diagram, layout of printed circuit board, firmware for microcomputer and software for PC.
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Nanocomposites with a metal matrix
Chlupová, Monika ; Kohout, Jan (referee) ; Zapletal, Josef (advisor)
This baechelor thesis is focused on metal matrix nanocomposites (MMNCs), whose research has started recently. In the first part of this thesis are generally defined composite materials, the larger part is dedicated to metal matrix composites (MMCs), on which are described the strengthening mechanisms that are also applied to MMNCs. The second part of the thesis is focused specifically on MMNCs. The concept of MMNCs and their distribution is defined first, followed by a definition of the reinforcement that can be used for the production of MMNCs. There are also described the posibilities for the production of these reinforcing phases, and their influence on the structural and mechanical properties of the final MMNCs. This section is followed by a description of possible processes of MMNCs production with their advantages and limitations. The last part outlines how research and development of these materials should be carried out in order to be commercially produced and used in the future.
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Prototype of Outdoor Computer on the FITkit Platform
Röhrich, Pavel ; Orság, Filip (referee) ; Novotný, Tomáš (advisor)
In this thesis is described prototype, which is built on a platform FITkit and is involved in the solderless breadboard.The paper describes how to connect and communication with MSP430 microcontrollers, GPS module, display, MMC card and a temperature sensor. The document also describes a prototype implementation. At the end of the document is dealt with possible extension.
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THE UNCERTAINTIES DEFORMATION AND STRESS USING THE STRAIN GAUGES
Dokoupil, Pavel ; Vlk, Miloš (referee) ; Koška, Petr (referee) ; Habán, Vladimír (advisor)
The dissertation thesis deals with the determination of uncertainty of strain measurement and the stress using resistance strain gages. You can find two methods to define the uncertainty in the thesis, GUF and MMC, and both are applied for measurements carried out with resistance strain gages. Definition of the measurement uncertainty was set for the strain measured by uniaxial and biaxial strain gages. The uncertainty of the stress was defined for linear strain gages, T Rosettes and Rosettes. There were universal mathematic-technical models defined to measure strain and stress, these models can be used either for standard and special measurements i.e. high-temperature, or for measurements in radiation field. Each part of the strain uncertainty and stress is analyzed from the point of view of a size of uncertainty and a form of probability of the function that strain and stress can adopt. The maximum focus was dedicated to the mistakes influencing measured strain like strain gage properties, installation and operating influences, external influences, time effects and the influence of the measured object. There are two mistakes influencing the stress described and analyzed in the thesis, the mistake of the Young’s modulus of elasticity and the mistake of the Poisson’s ratio. The thesis is conceived as a complex of information related to the measurement uncertainties using the resistance strain gages and methods of defining the measurement uncertainty in a way that the experimenter can apply the gained info and methods in the required measurements. The final chapters give representative examples to define measurement uncertainties for uniaxial and biaxial stress applying GUF and MMC method. The thesis also includes the experiment that compares measured values of strain, stress and measurement uncertainties, using several different types of strain gages at different temperatures, with theoretical calculation of strain and with stress. The experiment was carried out using the displacement sensor that works on an elementary principle of bending load.
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Prototype of Outdoor Computer on STM32VL Discovery Platform
Leštach, Marek ; Orság, Filip (referee) ; Novotný, Tomáš (advisor)
This thesis focuses on describing of an outdoor computer prototype based on STM32VL Discovery platform and building it on the prototyping board. Prototype is able to locate itself with the help of GPS module and received data are recorded into connected MMC card formatted with the FAT filesystem. Information and trip statistics are displayed on a graphic display. Data on memory card are saved in NMEA-0183 format provided by the GPS module in order to be used with a map software on PC.
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Simulation of multilevel converters
Strieš, Jakub ; Huták, Petr (referee) ; Lažek, Tomáš (advisor)
This bachelor thesis deals with the search of multilevel voltage converters. The aim of the work is to acquaint the reader with the basic topologies in the first part and to simulate selected events on some of them in the second part. Topologies with clamping diodes, floating capacitors, cascaded H-bridges and modular MMC converters are presented. The simulations are performed for the last two mentioned topologies. The PWM methods used in this topic are also described. The results of individual simulations are presented in the final part in the form of graphs. Together, four events were simulated, namely direct connection to the network, start-up by ramp, failure of one phase and disconnection of the load. A block simulating an asynchronous motor was used as a load for the models.
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Using of SD Memory Card for FITkit Platform
Gazda, Martin ; Slaný, Karel (referee) ; Vašíček, Zdeněk (advisor)
Reconfigurable hardware architectures represent a modern trend in development of new circuits. A lot of embedded systems is used as mobile devices with high demands on data capacity and power consumption of peripheral devices. This demands are suited with FLASH based memory, like SecureDigital memory card. This bachelors thesis deals with the problem of usage of this memory card on FITkit development platform.
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Analyser of DMX512 Protocol with USB Interface
Bartoň, Zdeněk ; Hošek, Jiří (referee) ; Kouřil, Jiří (advisor)
Aim of this work is to make know readers with modern technologies for driving scenic and musical techniques, with focus especially on a new technologies of communication. Subsequently this work deals with proposal and realization electronic device enabling analysis of control protocol DMX512, but also testing bus DMX512.
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Connecting SD Memory Card to Microcontroller
Laurinc, Pavel ; Kubek, Ján (referee) ; Škarvada, Jaroslav (advisor)
Author concerns with SD memory cards and microcontroller Atmel ATmega128. He describes their architecture, features, properties and technology used in devices. He is mentioning principle of communication protocols used by SD card, through that cards can communicate with other connected devices. He analyzes the functionality of FAT file system. He describes the design and implementation of interfaces to connect the SD cards to microcontroller. He explains software solutions of this project and gives impartial view to usage and comparisons of implemented modes of communication witch card.
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