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Meteo weather station
Dvořák, Jiří ; Fajmon, Petr (referee) ; Fedra, Zbyněk (advisor)
The aim of this master‘s thesis is design and construction of home meteo weather station, the choice of applicable temperature, humidity and pressure sensors and characterization of workable device of station. The core of the station is microcontroller ATmega8 used for process data from sensors. Evaluative criteria for choice of sensors will be comunicate interface, accuracy, operating range, current drain and other aspects. Outer transmittin unit measure air temperature and relative humidity. These data are trasmitted by wireless radio module to interior receiving unit, that measure interior temperature and atmospherical pressure and represent measured data to LCD display including dew point. The data are transmitting to the internet and storing in the database. Measured values are available on the web page where you can display the graphs of last measured values.
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Electronic control of servomechanism for drive-simulator
Valouch, Martin ; Šebesta, Jiří (referee) ; Fedra, Zbyněk (advisor)
The aim of this bachelor´s thesis was construct electronic driving unit of positioning servomechanism in driving simulator. As controlling unit was chosen 8-bit microcontroller ATmega16 produced by ATMEL® and for scan actual angle of displacement the seat magnetic rotation encoder AS5040 produced by Austriamicrosystems®. For construction of bridge circuit were chosen MOS transistors. This transistors are excited by two Power MOSFET Drivers. Their job is convert output signal TTL logic from microcontroller to voltage in needed norm for transistors circuit closing. Data from PC in drive simulator can be transfer by serial interface RS485 or RS232.
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Mikroprocesor controlled equalizing repeater.
Požár, Marek ; Fedra, Zbyněk (referee) ; Kovář, Jan (advisor)
The correction amplifier is included in many audio applications. Its use is mainly in the regulation of volume, height, depth, balance settings, channels, and extended versions as well as more band equalizer. There are the simpler versions such as home movies, personal computers, car. However, there are even more demanding applications, where the correction amplifier extended to listening to different bands. Already mentioned band equalizer, which is now part of almost every recording studio. Applies even when the sound of concerts. This project deals with its links with the microprocessor and then control the PC via USB. Utility sends the PC via USB management factors in the microprocessor data, which is further processed and under control of the data correction circuit amplifiers using the IIC bus.
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Exhaustion control system
Bršel, Boris ; Šebesta, Jiří (referee) ; Fedra, Zbyněk (advisor)
The topic for my bachelor’s thesis is control system of exhaustion for wood industry. It is very broad issue, and since I am without experiences in this division I have chosen to create easier model of exhaustion system. I would like to continue in this project in master´s thesis too. My thesis consists of description the requisites for system like this, draft of the preparation and also practical preparation for joinery manufactory. I have decided to control the parts of system by microcontrollers, which communicate with each other wireless and control activity of system´s parts of exhaustion in workshop. The role of this thesis was also to compare the achieved results with other possibilities of control of exhaustion from the economic and technological points of view.
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Flight statements electronic sensor.
Harant, Josef ; Fedra, Zbyněk (referee) ; Šebesta, Jiří (advisor)
This diploma thesis deals with theoretical analysis, design and practical solution of flight statements electronic sensor. This device is primarily intended for measuring telemetry data during aerobatic flights. Theoretical part contains fundamentals of GPS and inertial navigation systems. Design of the device is divided into three parts - design of block structure, construction and software for the measuring device. The final realization is made with respect to minimal system requirements and to possible future extensibility for wider usage spectrum.
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Sound to MIDI conversion
Pleva, Pavel ; Frýza, Tomáš (referee) ; Fedra, Zbyněk (advisor)
This thesis deal with possibilities of conversion simple musical signal to MIDI format. It contains brief introduction into chosen parts of MIDI standard which are important for this theme. Further there are examined characteristic attributes of sound which are needed to detect from musical signal to be written in SMF or which affects detection of useful attributes. There is given an account of algorithm for conversion implemented in Matlab.
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Wireless communication module in 868 MHz band with MESH network support
Uhlíř, Marcel ; Fedra, Zbyněk (referee) ; Povalač, Aleš (advisor)
This thesis deals with design of a wireless communication module that allows communication in the unlicensed band at the frequency of 868 MHz. The designed module can be easily implemented in various types of embedded devices using SMT technology. This communication module consists of a low-power radio frequency transmitted, balancing element, impedance matching, radio antenna and electromagnetic shielding. Communication between the embedded device and the wireless communication module is realized using the SPI interface and configurable GPIOs. Part of this work is the proposed firmware library, which operates the wireless communication module and allows communication in peer-to-peer mode and in MESH network mode. A procedure for its creation and management is created as part of the MESH network. The use of this work is directed to the field of control and sensor systems with application in automation.
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Light decoration with LEDs
Paus, Anton ; Fedra, Zbyněk (referee) ; Zelinka, Petr (advisor)
The aim of this bachelor´s project was to explore the possibilities of the design and subsequent realisation of a light decoration with LEDs. In the theoretical part of the project the control options of a microcontroller and various LED driving circuits were discussed according to available sources. As the decoration should be sensitive to changes of ambient light conditions, attention was given to photosensitive parts such as phototransistor and photoresistor. According to this information the most suitable circuits were chosen for the final design (microcontroller ATmega16 and LED driver SCT 2024C). Thereafter the printed circuit board was designed and consequently realized. Software that controls the decoration was developed using the operational device. The outcome of work is a light decoration composed of three boards with possibility to connect another ones.
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Image processing algorithms in eight-bit microcontroller
Rébl, Miroslav ; Fajmon, Petr (referee) ; Fedra, Zbyněk (advisor)
The aim of master thesis was to investigate a simple camera and processor Atmel AVR unit implementation. Thesis describes how to get image from C3088 module and management over the bank of camera registers. Work includes limitation draft for this way of processing the information. Thesis also solves an exemplary model for object recognition using this implementation.
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PH controller for aquarium
Dvořák, Jan ; Fedra, Zbyněk (referee) ; Šebesta, Jiří (advisor)
This bachelor’s thesis deals with the system which is designed as a pH regulator for aquarium water. The first and second chapter are aims to the basic requirements and possibilities on controlling of the potential of hydrogen in water. Main methods of the pH measuring, its controlling and regulation are included. The third chapter presents a design of the pH regulator system. The practical and software solution of this project is presented in the fourth and fifth chapter. There are described in detail the main blocks of the pH regulator - amplifier, galvanic isolator and output power stage. The results of the testing and measuring of the designed subsystems are introduced in the last part of the work.
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