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Update of the exercise demonstrating the synthesis of periodic signals to the course Signal and System Analysis
Fojtík, Timotej ; Liska, Matej (referee) ; Krajsa, Ondřej (advisor)
Signal Synthesis, Teaching Signal Analysis and Systems, Periodic Signals, Harmonic Components, Microcontroller ATmega328, Digital-to-Analog Converter MCP4921, Reconstruction Filter, Power Supply and Overvoltage Protection
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ArtNET and DMX converter
Strouhal, David ; Schimmel, Jiří (referee) ; Krajsa, Ondřej (advisor)
Goals of this thesis is design and realization of Art-net to DMX512 converter. First, a description of the currently used protocols for controlling stage lighting was made. This was followed by a successful proof of concept of the solution and subsequent implementation of the converter including PCB design and programming of the ESP32 processor to convert the protocols.
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Hardware Module for Interactive Control of Projects in PureData
Křivánek, Roman ; Krajsa, Ondřej (referee) ; Schimmel, Jiří (advisor)
In the work, there are basic theoretical information about the Arduino Uno R3 board. Then there are theoretical information about the components used. Furthermore, there is a chapter in the work where individual components are tested with the Arduino Uno R3 board. During the testing of the components, circuit diagrams and sample codes are provided to test the functionality of the components and modules. At the end of the work, there is a chapter on the design of the printed circuit board, which is the output of this work
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Update of laboratory exercises for the course Analysis of Signals and Systems
Chrástek, Jakub ; Liska, Matej (referee) ; Krajsa, Ondřej (advisor)
My work focuses on updating selected laboratory exercises for the course Analysis of Signals and Systems. In the first half of the theoretical part, the basic concepts and subdivisions of frequency filters and their overview in terms of design type, transmitted bandwidth and approximations are presented. In the second half of the theoretical part of the thesis, basic information on aliasing is given. The practical part of the thesis focuses on calculating and optimising the values of the selected parameters. These parameters are simulated in OrCAD Capture CIS. The design part presents the source design and 3D PCB models in Fusion 360.
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DMX 512 protocol analyzer for personal computer
Brouček, Vilém ; Juráň, Radovan (referee) ; Krajsa, Ondřej (advisor)
This bachelor thesis consists of designing and assembling an USB–DMX512 analyzer. It contains detailed information about the protocol itself, particularly the structure of the signal and its physical layer. It discusses options for analyzing the signal, chooses an appropriate microcontroller unit and provides a draft of a hardware for the controler. The thesis describes the assembled analyzer, explains its functions, the selection of components, and the principles of PCB design. It also explains the usage of the device and its potential future upgrades. The thesis provides a description of the code for the STM32 microcontroller and the custom-made libraries used for the DMX512 packet analysis and creation. It then familiarizes the reader with the code of the personal computer application, the reasons for choosing C# as the main programming language, and explains the structure of the object-oriented code, along with the custom-made libraries for DMX512 packet generation and analysis of the received data. The result of the thesis is a working DMX512 analyzer, which can receive and transmit the signal, display transmitted data, and connect to a PC via the developed software.
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Home vermicompost monitoring system
Lakomý, Jan ; Krajsa, Ondřej (referee) ; Michálek, Jakub (advisor)
This bachelor's thesis deals with the design and implementation of a system for monitoring a vermicomposter, aimed at maintaining optimal conditions for the efficient decomposition of organic material. The theoretical part of the thesis introduces the composting process with a focus on vermicomposting and environmental factors that influence this process (such as temperature and humidity). The practical part is focused on the detailed design of the monitoring system, the description of the components used, and how they function. The next section describes the individual hardware and software parts of the system. In the final part, the system is tested to verify its functionality and reliability.
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LoraWAN gateway for sensor network
Rehberger, Marek ; Juráň, Radovan (referee) ; Krajsa, Ondřej (advisor)
The master thesis deals with the design and implementation of a communication gateway for IoT technology, specifically LoRa / LoraWAN technology. In the practical part, the circuit diagram was developed and the circuit board was constructed in the Fusion360 program, and the software part was created for communication and data collection between the sensor part and the MQTT server.
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Multi-protocol sniffer and analyzer
Lukáš, Vojtěch ; Zeman, Kryštof (referee) ; Krajsa, Ondřej (advisor)
The subject of this thesis is the design of a device that captures Bluetooth Low Energy or IEEE 802.15.4 frames and sends them via Ethernet interface to a computer for further analysis using Wireshark. The device is based on the CC2652RB microchip from Texas Instruments, which is accompanied by WIZnet W5500 Ethernet controller. This thesis describes software and hardware aspects of said device, furthermore it briefly mentions a custom designed Wireshark dissector. In addition, this thesis contains a quick handbook for Texas Instruments microcontrollers software development.
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DMX 512 protocol analyzer for personal computer
Vahalík, Jiří ; Sysel, Petr (referee) ; Krajsa, Ondřej (advisor)
The bachelor thesis deals with the design of a DMX converter for a personal computer. The theoretical part summarizes the DMX, RDM and Art-Net protocols and other commonly used communication protocols used by microcontrollers. In the practical part, a device circuit is fabricated, which is subsequently processed as a printed circuit board. In the last part of the thesis, programs are designed to ensure the functionality of the whole converter.
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