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Design and realization of a developement board for BeagleBoard
Ťapucha, Andrej ; Hanák, Pavel (referee) ; Krajsa, Ondřej (advisor)
Contents of the thesis is to design and create an expansion board for the BeagleBoard computer one plate . The first and very important part was to find out all the possibilities for an extension of the computer itself . Choose the right expansion port . To study the possibility distribution of individual pins . Followed by the appropriate extension election districts that demonstrate the function of each enlargement . Test was designed PCB that contains circuits that change the voltage level of the BeagleBoard to protect a mini computer to the testing of each gusset periphery prevent damage to itself or part of the BeagleBoard . The peripherals themselves bind different parts of theoretical introduction. More specifically the extension of the LCD display is selected segment and includes two lines of 16 characters . When the possibility to add additional components were necessary to deal with the shortcomings of the output pins , this problem was solved by using an expander . He extends itself BeagleBoard by another 16 pins . On these pins are connected together on the LCD matrix keyboard . The creation of the board are two circuit temperature sensors , but have a different type of communication using I2C and one second using 1 -Wire bus . The board also contains various other bus outputs , for example, UART bus. It also contains an output pin which can be controlled PWM modulation . The remaining pins are versatile GPIO pins which can be programmed to define a function using the Linux operating system . The result is a final board of the package control programs which make it possible to verify the individual peripherals.
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DC/DC converter 12V/300V
Žurek, Jan ; Hanák, Pavel (referee) ; Kubánek, David (advisor)
This Bachelor´s Thesis is about switch power supplies theory. It contains comparation with power supplies made of linear components and briefly describes principals of each type. Bigger attention is devoted to fly-back engagement, on which´s basic is then in practice designed particular switch power supply. All key components are counted, including initiation of important species interaction, especially of transformator, MOSFET semiconductor triode, output diode, and there are chosen important components, which are subsequently implemented into the particular switch power supply engagement. This blocking engagement turned out to be functionless. That was why I decided to use engagement called half-bridge, which was viable.
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GUI for impedance measurement automation on Agilent 4294A
Dejdar, Petr ; Jeřábek, Jan (referee) ; Hanák, Pavel (advisor)
The goal of the bachelor thesis is to develop a control software for Agilent 4294A impedance analyser. Text of the theoretical section explains the dataflow of GPIB interface, basics of National Instruments LabView enviroment and the description of Agilent 4294A and its drivers for LabView. The function of the control software is a transfer of data from analyser, its conversion into Microsoft Excel .xlsx format + receiving screenshot in .png format from the analyser’s display. There are described all of subroutines contains setting and reading analyzers setting in this thesis. The conclusion sums up possible control software variation in regard to its complexity.
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Power supply and protection circuits for 6-channel audio amplifier
Kryška, Vojtěch ; Balík, Miroslav (referee) ; Hanák, Pavel (advisor)
This bachelor thesis deals with designing protection circuits for 6 channel audio amplifier. Created circuits provide AC voltage filtering, current peak limitation after switching on, delayed speakers connection for eliminating crackling, automatic shut down in case of overheath, LED indication of failure and waking up from standby mode. Created design focuses on keeping all channels grounds unconnected with each other for eliminating ground loops.
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Electronic RLC meter
Dvořák, Radim ; Hanák, Pavel (referee) ; Lattenberg, Ivo (advisor)
This work deals with measurement methods of passive components R, L ,C used almost in every electrical circuit. Work describes progress of choosing the right methods for measurement and also the process of designing the autonomous RLC meter with use of ATMEL microprocessor chips. The RLC meter will be powered from rechargable battery and will be able to measure primary attributes of RLC components.
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Design of semiconductor optical amplifier
Somora, Rastislav ; Hanák, Pavel (referee) ; Slavíček, Karel (advisor)
Diploma thesis deals with the construction of a moder semiconductor optical amplifier SOA. In the first chapter optical comunication and the use of optical amplifiers is described. In the next chapter some types of optical fibers, their chemical composition and properties are described in detail. The third chapter overviews optical amplifiers, their use today, describes their advantages and disadvantages and their proper use in optical comunications. The fourth chapter describes the solution of the objective, the right layout of separate blocks and connections used in measurements. Fifth chapter describes used components, describes their basic parameters and proper use in circuit. The last chapter evaluates outputs of measurements and their impact on the objective.
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Project of VoIP exchange for commercial usage
František, Jiří ; Hanák, Pavel (referee) ; Janovič, Filip (advisor)
The aim of this thesis is create VOIP central based on Asterisk with billing system A2Billing. First of all is describe process of instalation programing instrument and provisioning pbx for local and outgoing calls. Short describe to billing of calls and praktical show of completely setting of system are follows. Administrator and user web based interface is described to. At the end of thesis is shown different technology of VOIP phones which was use in thesis. Setting of this phones is briefly described.
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Evaluation of the Financial Situation of a Company and Proposals For Its Improvement
Kučerovský, Radek ; Hanák, Pavel (referee) ; Sághy Estélyi, Kristína (advisor)
This thesis evaluates the financial situation of Pekárna Crocus, Ltd. between the years 2006 - 2011. The aim of this work is to evaluate the current financial position of the company and to draft proposals for its improvement. The first part will summarize all the theoretical knowledge, on the basis of which the practical part will be created. The second part consists of information relating to the company. In the third part of the work a financial analysis will be done and finally the proposals and measures to improve the current financial situation will be presented.
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USB cable tester
Fašanga, Jozef ; Hanák, Pavel (referee) ; Lattenberg, Ivo (advisor)
Measuring low resistances is a problem that also occurs with USB cables. The basic feature influencing the functionality is the voltage drop. The work deals with the theoretical possibilities of measuring low resistances and subsequent realization of connections. The ATmega32U4 microcontroller is used to control the device, which provides a USB interface for programming. Work theoretically discusses individual communications used for OLED display and ADC. Subsequently, the work discusses the design of the box for the device and the basics of the program, which is uploaded to the microcontroller.
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