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Electronic Compass Based on Three-Axis Magnetometer
Okoun, Petr ; Povalač, Aleš (referee) ; Šebesta, Jiří (advisor)
This semestral thesis deals with development of electronic compass with three-axis magnetometer which eliminates deficiencies of magnetic compass and then the developed device is usable anywhere at Earth's surface around the world. A compass is able to measure the azimuth only if its position is horizontal. Bearing in mind that this condition cannot be satisfied in any case, the solution of compass tilt compensation using accelerometer is part of the project.
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Radar Signals with Pulse Compression Analysis in Matlab
Trnčíková, Veronika ; Dušek, Martin (referee) ; Šebesta, Jiří (advisor)
This thesis is dedicated to pulse modulation influence to the ambiguity function. The ambiguity function indicates the resolution of the system in range and Doppler frequency. The thesis contains the general introduction of radiolocation basis, individual modulations and the solution in MATLAB environment utilizing spare matrix principles. Graphs of ambiguity function for individual modulations created in MATLAB environment are included in the text.
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Control system for lasertag weapon
Svozil, Martin ; Frýza, Tomáš (referee) ; Šebesta, Jiří (advisor)
This thesis is focused on design of devices for lasertag game. The work describes the functionality of each subsystem for lasertag game and specifies also their requirements. The gun unit, sound system, capacitive proximity sensor and other peripherals represent the main parts of lasertag system. The complete design for all units and final realiation of the sound system and capacitive proximity sensor are provided in the practical part of this work. Source code for microcontrollers are included in attached CD.
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Data logger for serial communication lines
Jankech, Tomáš ; Šebesta, Jiří (referee) ; Dušek, Martin (advisor)
The aim of bachelor’s thesis is the realization of data logger for serial communication lines. This paper describes basic concepts of serial communication and looks more deeply into RS232 and RS485 serial communications standards. It describes usual methods of data recording and their application in practice. Data logger’s block diagram is described in detail for each of its parts. Their descriptions contain an overview of circuits, which allows realization of individual blocks and circuit diagram of selected circuit. Following chapters describes design of printed circuit board, control application for PC and firmware for the microcontroller.
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Audio matrix-switch
Dluhý, Vojtěch ; Kaller, Ondřej (referee) ; Šebesta, Jiří (advisor)
Target of this bachelor thesis is make analyse and concept of matrix for switching audio signals with best quality in radio station. Inputs are regulated and outputs are adjusted to line level for connecting with another devices. Matrix is controlled from PC over USB by microcontroller. From this findings is made electrical scheme, PCB a mechanic design of this equipment. Finally, device is constructed.
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Realisation of microclimate control system for plants
Fikar, Jan ; Šebesta, Jiří (referee) ; Urbanec, Tomáš (advisor)
The aim of my Bachelor thesis was to design an automatic system that would maintain the perfect conditions for growth and development of indoor plants. Plants kept in human households have specific requirements that are often not met. I measured, altered and evaluated several quantities (humidity, temperature, lighting). The whole system is controlled by microcontroller ATmega32.
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DDS waveform generator
Čada, David ; Tejmlová, Lenka (referee) ; Šebesta, Jiří (advisor)
This project deals with design and realization of the function generator using a direct digital synthesis. This work solves hardware and software of the function generator, which is capable to generate following shapes: sine, trialngle, square with variable duty cycle, pulse width modulation, frequency shift keying, pulse, linear frequency sweeping, logaritmic frequency sweeping, and programable signals of a serial peripherial interface.
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Inertial navigation system
Homolka, Martin ; Šebesta, Jiří (referee) ; Tejmlová, Lenka (advisor)
This bachelor’s thesis deals with project of inertial navigation system, composed of modules, GPS, compass, gyroscope and accelerometer. It explores communication and action between them and solves the control circuit design in the form of single-chip microcontroller. After that, appropriate combination of modules will be selected from available products and circuit connections will be proposed, supplemented by portable storage medium. After loading the firmware, this creates an inertial navigation system, which is able to write the current position to portable storage medium, even in the case of GPS signal failure.
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Laboratory waveform generator based on DDS
Kret, Tomáš ; Povalač, Aleš (referee) ; Šebesta, Jiří (advisor)
The project concerns about design of function generator based on direct digital synthesis, its software and hardware realisation. It solves generating functions depended on time like sine, triangle and square with variable duty cycle, burst and other functions of frequency sweep, FM and PWM modulation. Next goal is to display user interface on graphic LCD display and to control microcontroler pheripheries of AVR.
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Power LED Current Analyzer
Ryba, Ivan ; Vochyán,, Josef (referee) ; Šebesta, Jiří (advisor)
This thesis describes attributes of LED, especially high power LED. Evaluates posibilities of measuring the current passing through the high power LED device in the automotive industry. The basic requirement for the analyzer is adjusting it for the voltage and current through LEDs. Analyzer have to display the mean current and frequency. Additionally also minimum and maximum current, duty cycle and amplitude might me displayed. The central element of the device is ATmega16 microcontroller.
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