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Design of a convertor for a BLDC motor
Stejskal, Martin ; Valach, Soběslav (referee) ; Macho, Tomáš (advisor)
This master thesis deals with the design and realization of a drive for a 500 W BLDC motor powered with a battery power supply. It also deals with the possibilities of realization of drives and other possibilities to control these motors. Describes the implementation of the inverter using Atmel's AVR microcontroller. The thesis also deals with the design of an auxiliary switching inverter. Communication with UART and CAN interface is also implemented.
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The Model E-shop
Stejskal, Martin ; Kroulík, Bohuslav (referee) ; Dvořák, Jiří (advisor)
This thesis is concerned with designing an internet shop for company. Based on the knowledge and information gained in the theoretical part and in the company's proposed solution shop which will improve the promotion of the company and bring new customers.
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Transient Thermal Response Measurements
Stejskal, Martin ; Čala, Martin (referee) ; Beneš, Petr (advisor)
This Bachelor thesis is interested in measurement of thermal parameters of three-phase power switching module. The module contains IGBT power transistors and power diodes, whose dynamic parameters are measured. Based on these measurements, substitute thermal models are constructed, necessary for heat loss simulations and calculations.
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Digital oscilloscope with AVR
Stejskal, Martin ; Mikulka, Jan (referee) ; Friedl, Martin (advisor)
The aim was got acquainted with microcontrolers from ATMEL family and study on wthat principes works analog and digital osciloscopes. On base of this informations, block design was made of digital osciloscope with microcontroler ATMEL from family AVR. The following chapters were look for a solution of input circuits with A/D convertor, witch transform analog signal to digital. Then, the digital signal is processed another circuits. Extended part of this work is software, witch must also controll data protocols and data security.
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Videoconference at school
Karadžos, Petr ; Lustig, František (advisor) ; Stejskal, Martin (referee)
TITLE: Videoconference at school AUTHOR: Petr Karadžos DEPARTMENT: Department of technical and informatics education SUPERVISOR: doc. RNDr. František Lustig, CSc. ABSTRACT: The theoretical goal is based on overview of videoconferencing solutions regarding to usage in educational process and overview of application videoconferencing solutions. Moreover, theory part is also focused on how videoconferences are working according to technical background. The descriptions of signaling process between two or more ending points and how are multimedia data transmitted during videoconference calls. The topic of practical part is to analyze how videoconferences can be used as technical educational tools in learning environment based on videoconferencing pilot project. KEYWORDS: Videoconferencing, H.323, SIP, webinar, multimedia, ICT, Multicast, Moodle, GoToWebinar
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Set of tasks using the AutoCAD program for secondary schools
Austová, Vladimíra ; Battistová, Eva (advisor) ; Stejskal, Martin (referee)
Theoretical part of this thesis informs the reader about history of CAD and AutoCAD programs. It maps the development of the software since the early era till today. Analysis of available information sources focuses on publications, that guides the reader through the working environment of AutoCAD software in various release versions. Publications are rated based on their structure and suitability for readers. Practical part of the thesis focuses on creation of explanatory examples with detailed step by step guide, that should help understand and solve these examples. Another part consists of test examples that should allow students to test what they learnt in explanatory examples. Goal of the research part of the thesis is to determine the knowledge level of technical high school students based on their success with solving the explanatory examples prepared in practical part. The research took place in April 2012.
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