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Photoresist exposure via the LCD panel
Fiala, Matouš ; Starý, Jiří (referee) ; Vyroubal, Petr (advisor)
The bachelor thesis deals with the design and development of a device using a liquid crystal display panel to create a motif when exposing a photoresist to ultraviolet radiation. For a functional design, it is essential to understand and comprehend the various components of the device, the physical principles and the control of the exposure process. The first part of the text is a theoretical summary that should introduce the reader to the issues discussed in the following sections. This is followed by an analysis and proposed solutions to specific obstacles related to the design and realization process of the device. The work includes manufacturing of a prototype device, the creation of the device software, and a user interface application through which the device is controlled. The thesis also contains simulations, a CAD model of the prototype, documentation and measured exposure results.
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SMPS design and assembly with an output of 2.5 kW
Pospíšilík, Vojtěch ; Cipín, Radoslav (referee) ; Kadlec, Josef (advisor)
This diploma thesis describe the desing and assembly of switching power supply with an output of 2,5kW. At first is described the funcional principle of SPMS. The next is the proceed design of power part of the converter composed from calculation of transformer, inductors, capacitors and sizing of semiconductors. There is proceed the calculation of power looses. The next step is to make acquaintance with the possibilities of feedback control, creating a model system for simulating and executing the selection of an appropriate regulatorystructure.The following is the calculation of regulators suitable method and simulation at program MatlabSimulink. Is procced the computing and realization of regulators and finding the PWM modulator. At over is constution of contorl logic and desin of printed circuit desing, assembly and their recovery.
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Exposure equipment for PCBs
Fiala, Matouš ; Čech, Ondřej (referee) ; Vyroubal, Petr (advisor)
The Master's thesis deals with the fabrication of printed circuit board exposure devices, including establishing a theoretical basis for understanding the PCB production process, using lithography over a liquid crystal panel to create a motif. The thesis includes the creation of a CAD model of the device, including a UV source and then thermal simulation of the cooling of the device. The fabrication of the device also involved the creation of a custom motherboard that integrates all of the electronic components. The main result of this work is an assembled functional device with a unique LCD layer arrangement that allows reliable exposure of dual-layer PCBs, which is supported by testing. The most comprehensive part of this thesis deals with the development of a complete software platform, consisting of an application running on the microcomputer of the exposure device and a multi-platform application through which the device is wirelessly controlled.
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Car Movement Measurent on Carrera Racing Tracks
Šíma, Vojtěch ; Malaník, Petr (referee) ; Rydlo, Štěpán (advisor)
The aim of this bachelor thesis is to design a measuring device that allows to measure quantities such as speed, acceleration and centripetal force while the car is moving on the Carrera racetrack. An embedded system will be created for measurement, where the main result is a printed circuit board that was created and mounted according to a schematic design composed of currently available electronic components. As the board moves along the race track, data is then recorded based on the implemented program, which is stored on a memory medium and later processed for a suitable visual presentation. Based on this data, it is then possible to analyse how the model behaves when moving on the autotrack and which factors have an effect on this movement.
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Photoresist exposure via the LCD panel
Fiala, Matouš ; Starý, Jiří (referee) ; Vyroubal, Petr (advisor)
The bachelor thesis deals with the design and development of a device using a liquid crystal display panel to create a motif when exposing a photoresist to ultraviolet radiation. For a functional design, it is essential to understand and comprehend the various components of the device, the physical principles and the control of the exposure process. The first part of the text is a theoretical summary that should introduce the reader to the issues discussed in the following sections. This is followed by an analysis and proposed solutions to specific obstacles related to the design and realization process of the device. The work includes manufacturing of a prototype device, the creation of the device software, and a user interface application through which the device is controlled. The thesis also contains simulations, a CAD model of the prototype, documentation and measured exposure results.
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DC/AC one-phase inverter 230 V / 50 Hz / 60 VA for a back-up supply source with a galvanic separation
Šoupal, Ondřej ; Procházka, Petr (referee) ; Vorel, Pavel (advisor)
The aim of this thesis is to design power circuits and control circuits of single phase DC/AC inverter and its practical realization. This work describes basic principle of single phase inverter. Next step is a solution of output LC filter, input capacitor and semiconductor devices. It contains block diagram of control circuits and it focuses on design of oscillator for pulse width modulation and current limiting. The thesis gives details about practical realisation and testing measurements. Technical documentation was prepared for this inverter.
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Výroba desek plošných spojů pomocí CNC zařízení s využitím Open Source nástrojů
HOUŠŤ, Milan
This bachelor thesis aims to describe the production process of prototype and small series printed circuit boards on a computer numerically controlled (CNC) milling machine, and to document a practical reproducible working procedure using CAD-to-CAM files and open source tools to create a CNC control file. In the analysis section the results of the proposed procedures will be presented using a specific printed circuit board as example.
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Využití open-source nástroje KiCAD pro realizaci ostrovního nabíjecího systému
LIŠKA, Tomáš
The subject of this bachelor thesis is creation of a complex text using the design tool KiCAD for the design and realization of electronic circuits and data for the production of printed circuit boards. The aim is to create production data that will be used for the manufacture of printed circuit boards. In the application section, the printed circuit board will used together with a control system to implement an island charging system.
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Using thermochromic systems for testing heat distribution
Klimeš, Jan ; Sedlaříková, Marie (referee) ; Zatloukal, Miroslav (advisor)
This thesis deals with principles of thermochromism and its possible applications in heat distribution testing. Theoretical part describes mechanisms which allow the thermochromic properties of the substances. Particular attention is paid to cholesteric liquid crystals. Ability to measure the heat for this type of liquid crystals was varified. Also long service life in high humidity environment, enviroment with intense UV radiation, cyclic changes in temperature or immersion in water was tested. A possibility of their practical use in diagnosis was verified as well. Specifically mapping of heat distribution on an assembled PCB. Conclusion contains comparison and evaluation of this method in terms of accuracy, user comfort and economic advantages compared to conventional infrared sensors.
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