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Wireless sound transfer
Jeřábek, Vojtěch ; Bohrn, Marek (referee) ; Pavlík, Michal (advisor)
The thesis deals mainly with the possibilities of using the module nRF24L01+ for the wireless sound transfer, with as low latency, good reliability and sound quality as possible. The first part of the thesis is devoted to the description of the device and its internal structure for wireless sound transfer, even in the case of transferring multichannel sound. The thesis also describes the sound digitalization process and its requirements for the final quality. The second part of this thesis is focused on the description of the wireless module nRF24L01+, including analyzing its internal structure and the way it works. A comparison to other wireless modules that are available on the market, including its advantages and disadvantages, is also provided. The third part of the thesis is devoted to the design of the described system for an electric guitar.
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Digitally controlled filter
Rez, Jan ; Szabó, Zoltán (referee) ; Friedl, Martin (advisor)
This bachelor's thesis deals with design of a functional prototype universal digitally controlled analog frequency filter 2th order. Part of the design is the selection of appropriate filter topology diagram and selection of an integrated circuit. Universal filter will contain lowpass, highpass, bandpass and notch filter. The filter is tuned in cutoff frequency from 100 Hz to 15 kHz. The bachelor's thesis focuses on the circuit analysis of selected concrete structure of universal filter and possibilities of digital control filters. The practical part of this thesis includes PCB design, control software for filter and graphical representation of measured results.
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Bluetooth Vibrating Ringer
Dočekal, David ; Dušek, Martin (referee) ; Povalač, Aleš (advisor)
This thesis is focused on the implementation of Bluetooth communication between a mobile phone and an external device. The first chapter focuses on Bluetooth technology in general. It describes the interface, device classes according to RF power, Bluetooth versions, security and pairing options. The second chapter of the Bachelor’s thesis deals with the Bluetooth module called HC-05. It describes the basic features and practical, module usage. It also shows the concept of the Bluetooth unit and describes the adjusting of certain parameters of the HC-05 module using the AT commands. The third chapter summarizes the deign and implementation of the device. Software and firmware development is overviewed in the fourth chapter. The testing and measurement results of the complete device are presented in the last part of this thesis.
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Usage of Busbar as a Source of Heat
Svoboda, Ondřej ; Macháček, Jan (referee) ; Radil, Lukáš (advisor)
This study is dedicated to the use of heat energy from the busbar and its cooling system. The study deals with thermal analysis of the busbar, both using numerical simulations in SolidWorks and practical examination – warming of the busbar. We can verify the correctness of the simulation from the measured values. To determine the temperature profile of the busbar, it is necessary to measure the temperature at various points of the busbar by contact method using thermocouple or contactless method using a thermal imager. Measurements are performed at the busbar LIA1600 made by Siemens Busbar Trunking System Mohelnice. The aim of the study is to analyze temperature busbar, to suggest the most efficient method of heat recovery, and to make economic calculation
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USB Host with PIC Microcontrollers
Kučera, Pavel ; Janoušek, Vladimír (referee) ; Hanáček, Petr (advisor)
The aim of master thesis is implementation of USB host in a microcontroller PIC. The thesis contains description of ways of peripherals to computer connections with detailed description of USB bus. There are also discussed several approaches in implementations USB host for embedded systems. A concept of layered USB host system is designed on the basis of analysis of the state of the art. Finally, the designed system is implemented in microcontroller. Resulting firmware of development kit is tested on real USB device.
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Utilization of local systems for power system regulation
Kostov, Jiří ; Geschwinder, Lukáš (referee) ; Bartošík, Tomáš (advisor)
Bachelor’s Thesis deals general information about methods of regulation of elektrification systems, including basic principles of regulation of frequency, regulation of voltage and regulation of reactive and active power. Work includes information about aggregate remote control system, power plants that participate on regulation and self device for regulation and controlling of reactive power. Work engages on new options in section of regulation and his requirements for distribution sites. Part of work deals information about renewable natural energy sources and his requirements for distribution sites.
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Monitoring of hazardous environment
Bilík, Martin ; Blecha, Radim (referee) ; Blecha, Petr (advisor)
Diploma thesis Monitoring of hazardous environment deals with possibilities of construction of monitoring device for the nuclear power station Temelín. In the first part are accurate requirements for monitoring device, individual risks and identify obstacles and opportunities how to overcome them. There is also description of basic options for measuring temperature and environmental monitoring. Using multi-criteria analysis was done the selection of all components, from which is possibility to construct the first development release of monitoring device. 3D models for each component and the overall design visualization facilities were created in the programming environment of Autodesk Inventor. The conclusion provides an overview of the financial cost of the equipment is assembled
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The utilization of wireless modules for data acquisition
Machů, Petr ; Mácha, Tomáš (referee) ; Martinásek, Zdeněk (advisor)
In the bachelor‘s thesis I deal with modern methods of wireless data transmission in decentralized wastewater treatment. I suggested three different architectures and various types of wireless modems related to them. Then I design the experimental workplace with the convenient architecture for an autonomous network. For data collection I use PLC (Programmable Logic Controller) Foxtrot series with the central unit of CP-1005 and I use two modems Conel CDL 800 operating in the unlicensed band 869 MHz for wireless transfer. In the Mosaic I design a program for reading inputs from wastewater treatment plant and maintenance of serial channel, in Radwin program I configure wireless modems for the point-point transfer. I present Hyperterminal configuration and delivered date are displayed in it. Finally, I design applications in PHP language that converts data into a graphic form. In conclusion, I present opportunities for further development and improvement of the network.
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Influence of optical connectors and of other effects on optical link attenuation
Winkler, Aleš ; Křepelka, Václav (referee) ; Filka, Miloslav (advisor)
In this time the metalic wires meet not the requirements of high capacitance and rate wire and so the new, modern fiber wires are more and more being used. This bachelor`s thesis deals with three basic kinds of connections of fiber wires, optical connector, mechanical coupling a optical weld, and their effect on optical link attenuation realized by fiber optics. The optical link is possible realized number of kinds fiber optics. In this thesis are most often used multimod and a little multimod fiber optics. By mechanical coupling are explored their effects of attenuation on optical link a their detrition after disconnection and next connection back to the optical line. For optical weld is explored quality assignet optic welder. For optical connectors is explored their quality of cleanness through apparatus OTDR( Optical Time Domain Reflectometer) and geometrical properties through apparatus FIBO 250.
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System for digital short-range wireless communication
Rébl, Miroslav ; Kolka, Zdeněk (referee) ; Tošovský, Petr (advisor)
This project includes the design of the System for digital short-range wireless communication. The methodology of the communication between net only one device type based system is proposed. The thesis describes system communication rules and used ways for protection of a correct transmission. Furthermore,the project descibes realizasion of the digital wireless communication with selected functions.
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