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Adjustable timer for three-phase motor
Motyčka, Lukáš ; Petržela, Jiří (referee) ; Hruboš, Zdeněk (advisor)
The thesis describes several potential solutions of an adjustable timer, such as monostable multivibrators, asynchronous (ripple) and synchronous counters and microcontrollers. It also deals with issue of switching three-phase asynchronous motors with limit a high starting current on starting - star-delta switch, softstarter, frequency inverter. Particular attention is focused on the conceptual design of the timer using micro- controller Atmel (timer control unit), LCD (display device) and control switches. The microcontroller will be complemented by external 32,768 kHz watch crystal, necessary for real-time function - Real Time Counter (RTC). The cause for this choice is not only simplicity and clarity of control to the operator, but also reliability, low power consumption and also the price of the device itself.
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Cyklocomputer with Frequency Meter
Netáhlo, Tomáš ; Fedra, Zbyněk (referee) ; Hermany, Jiří (advisor)
The Bachelor’s thesis deals with design and realization of the cyklocomputer with a measuring frequency of pedaling. The device measures speed, pedaling frequency, heart rate, distance traveled and the current time and date. Measured values are stored in memory and then can be transferred via USB bus to computer. The work includes a description of the magnetic sensors and ECG sensors. The practical part includes the design of hardware and software cyklocomputer.
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Battery powered datalogger with CPU
Andrýs, Jiří ; Beran, Jan (referee) ; Bradáč, Zdeněk (advisor)
In this design are mentioned processes of power consumption reduction of battery-powered devices.Execution of a project is software SPI for MMC card and file system FAT16 without extension of VFAT (Virtual File Allocation Table) – LFN (Long File Names). Hardware design consists of boost power supply, linear stabilizer, external RTC (Real Time Clock), IRQ low power modul, interface for MMC (Multi Media Card) and circuits for RS-232, RS-485. There is either a design of analog measuring interface.
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Multifunction board computer for motorcycles
Netáhlo, Tomáš ; Tošovský, Petr (referee) ; Brančík, Lubomír (advisor)
Master’s thesis deals with a design and a realization of multifunction board computer for motorcycles. The goal of the device is measuring speed, rotation speed of engine, temperature of ambient, temperature of engine, temperature in intake including signalization of overvoltage and hightemperature. The device is completed by above standard function such as measuring titl of motorcycle, climbing of route, route recording and data transmission to the computer. The thesis includes a complete solution of hardware and software part of the device.
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Communication with external devices by I2C bus
Prax, Jakub ; Šebesta, Jiří (referee) ; Frýza, Tomáš (advisor)
This diploma paper deals with the data bus line I2C and a supportive demonstration tool for the subject Microprocessor technology taught at the Radioelectronics faculty. The data bus line I2C is convenient when short-distance data transmission with restricted spatial possibilities is required but high velocity of data transmission is not necessary. The tool is compiled in such a way that enables it to also perform other tasks apart from those dealing with the I2C data bus line. The data bus line in the tool is utilized for transmission of date, time, temperature, data for the D/A converter, data from and to the EEPROM memory and data to 16 bits expander.
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Digital secondary clock
Hortvík, Martin ; Mašek, Petr (referee) ; Marada, Tomáš (advisor)
The aim of this thesis is to design and implement control electronics for digital secondary clocks. The first part is focused on familiarization with the issue of the use of secondary clocks. Subsequently, the work deals with the design of electronics for generating minute pulses. The first part of the proposal is to ensure the correct voltage size and polarity of pulse. The exact timing pulses are provided by a pair of control circuits, Atmega8 microcontroller and RTC. The last part describes the procedure of realization of electronics by making schema, design and manufacture PCB, circuit revive and the implementation of the module into case.
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Efficient use of Rational Team Concert for software development
Tůma, Pavel ; Buchalcevová, Alena (advisor) ; Pavlíček, Luboš (referee)
This bachelor thesis is devoted to software tool Rational Team Concert (RTC) which is destined for project teamwork support. The main goal of the thesis is to identify and describe the most important use cases of the tool. The thesis is divided into two parts. In the first part, the tool itself is described; his features, functionality and contribution; also installation and configuration of the tool that were need for purpose of this thesis and building up scenarios. In the second part, use cases scenarios are described within the scope of the web client RTC and development tool Eclipse. I divided the use cases scenarios according to participants - into administrator's scenarios and into ordinary user's scenarios who is created by administrator and his rights are limited. For better clarity, each participant has an enclosed diagram of scenarios sequence which represents their activities within the scope of described RTC clients. Each step in the scenario is represented in charts and often accompanied by images (screenshots) in a way to ensure clarity and clearness.
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