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Diagnostics of modern car control units
Slíž, Martin ; Vařacha, František (referee) ; Prokeš, Aleš (advisor)
The topic of this thesis is the design and implementation of an interface for communication with modern electronic control units of EDC group. The work is devoted to an introduction to the world of automotive diagnostics, analysis of communication protocols and rules for transmitting messages. The greater part is devoted to the analysis of the CAN bus belonging protocols. The outcome of this work is the design and implementation of a communication device for diagnostics of electronic control units of EDC group.
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Phone line simulator
Vítek, Jiří ; Vařacha, František (referee) ; Prokeš, Aleš (advisor)
This master’s thesis is focused on the problems of designing telephone lines which are 7 km long with a step of 1 km. The thesis contains a detailed description of the basic parameters of metallic transmission lines. There is also briefly mentioned the issue of interfering the transmission lines. The main part is devoted to a system design of artificial lines connection, including printed circuit board design. The next section deals with a design of prototype controlling. The last part verifies the activity of implemented artificial lines.
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Web server with ARM microprocessor
Tesař, Jan ; Vařacha, František (referee) ; Prokeš, Aleš (advisor)
Diploma thesis is dealing with design and implementation of the web server and manage- ment website in the developing kit FriendlyARM Mini6410 with installed OS GNU/Linux. The embedded packaging system PTXdist is described in terms of Kernel configuration and selection of suitable applications. The device should be later used for the remote management of atmospheric optical link.
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Electronic monitoring system for motor vehicles
Pospíšil, Martin ; Vařacha, František (referee) ; Prokeš, Aleš (advisor)
This thesis is about construction of a monitoring unit for motor vehicles. The unit is equipped with microcontroller, graphical LCD for displaying all measured values, GPS module and SD card slot. For measuremet of motor RPM, various methods of connecting to the motor are supported. Temperature is measured with few DS18B20 sensors, picking up engine temp, outsider and inside temp. GPS module is for measuring speed and height above MSL. All measured values can be recorded on SD card for future analysis on PC.
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Shortwave power amplifier
Zamazal, Bořivoj ; Vařacha, František (referee) ; Prokeš, Aleš (advisor)
This semestral thesis describes RF power amplifier design. In the first section of the work, the possible solutionsand a reflection on the possible solution are presented. In the second section, the principle and thesis for power amplifier design is described. In the third section, the power amplifier design, based on the theoretical knowledge, is described.
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Programme for channel coding demonstration
Závorka, Radek ; Vařacha, František (referee) ; Prokeš, Aleš (advisor)
The main subject of this thesis is creating a programme, used for channel coding demonstration. This programme will be used for teaching purposes. The programme contains various codes from simple ones, to those which almost reach Shanon’s channel capacity theorem. Specifically these are the Hamming code, cyclic code, convolutional code and LDPC code. These functions are based on theoretical background described in this thesis and have been programed in Matlab. Practical output of this thesis is user interface, where the user is able to input information word, simulate transmission through the transmission channel and observe coding and decoding for each code. This thesis also contains a comparison between individual codes, concerning bit-error rate depending on SNR and various parameters. There is a computer lab with theoretical background, assignment and sheets for convenient accomplishment of each task.
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Power amplifier for 2 metres radio amateur transmitter
Klapil, Filip ; Vařacha, František (referee) ; Prokeš, Aleš (advisor)
This work deal with development a solution of a power amplifier for 2 metres radio amateur transmitter with a minimum output of 1 kW. Part of the solution is to use a commercial module of power amplifier. In addition, the design of the input attenuator, the switching elements in the signal path, the output filter and the protection circuits including cooling. The bachelor thesis contains a proposal of a system solution with a discussion of required performance and legislative requirements. This is followed by a hardware section, where the work is devoted to the design of the hardware, the theoretical calculation of the components and the simulation. In the last part of the work deals with practical implementation, verification of function and measurement of achieved parameters and their evaluation.
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