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Design of a micromanipulator for repairs of printed circuit boards
Kopřiva, Pavel ; Skácel, Josef (referee) ; Otáhal, Alexandr (advisor)
This thesis deals with design and construction of micromanipulator based on pantographic mechanism with electronic control. The theoretical part presents possible principles of construction and control of micromanipulators. The practical part contains design of the pantographic mechanism. Furthermore, stepper motor based electrical drive section was designed and appropriate control circuits and power supply were selected. Finally, the micromanipulator was constructed.
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The gas monitoring equipment in breeding of edible insects
Chlumecký, Karel ; Skácel, Josef (referee) ; Adámek, Martin (advisor)
Bachelor’s thesis deals with monitoring of edible insects. The most monitured element will be dangerous gases. In the first part will be discussed the life cycle of edible insects and associated ecological consequences. Another part is description of measuring non-electric variables. This knowledge will be useful in design of breeding box in practical part of bachelor’s thesis. Design contains selections and description of used components and their locations on breeding box. Breeding box is managed by microcontroller ESP32 from Espressif family. Practical part contains first results of measuring and program for microcontroller. The results are in the form of a graph. Breeding box can be used for most terrarium animals.
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Optimization of fabrication technology and defect detection for ceramics structures
Chyťa, Filip ; Otáhal, Alexandr (referee) ; Skácel, Josef (advisor)
This work deals with the problems of defects in ceramics structures and packages, their detection and subsequent optimization of the manufacturing process in order to eliminate these defects. The first chapter summarizes ceramic materials in elec-trical engineering and deals specifically with Al2O3 and material GRANNALOX 9620 F and optimization of its production profile. The second chapter deals with preparation of the ceramic powder and its subsequent processing. The third chap-ter deals with detection of defects in the thus formed ceramic packages, testing their electrical, thermal and mechanical makings. In the next chapter I deal with my workflow, which I used in the production of packages, the way of production and testing of packages, including comparison of their makings.
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Optimization of the switching power supplies with synchronous rectifier
Skácel, Josef ; Macháň, Ladislav (referee) ; Žák, Jaromír (advisor)
This thesis deals with switching circuit topic, especially switching power supplies. There are switching circuits without inductance and their benefits presented in the thesis. Basic topologies of switching power supplies, their properties, application area and functions of basic types of converters are also described. The next section focuses on special resonant switching power supplies and synchronous. The main part of the work is carried out simulations using three synchronous rectifiers. The work includes practical design of an SMPS with synchronous rectifier.
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Drone construction for use in sensor technology made by 3D printing
Česák, Radim ; Skácel, Josef (referee) ; Adámek, Martin (advisor)
Goal of this term paper based od informaion gained from the internet was to design construction and then make drone with help of -3D printer, which will be used in sensor technology. In the first part term paper deals with familiarizing with problems that come with choosing parts and creating the frame in free 3-D modeling program. Second part of this work deals with practical construction of the drone, programming of its flight controller, which is ESP32 DevKit v1 and its testing.
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Design of magnetoplanar headphones with amplifier
Chyťa, Filip ; Búran, Martin (referee) ; Skácel, Josef (advisor)
This work deals with comparison of individual types of electroacoustic transducers, their properties and practical use. Furthermore, design and manufacture of a magnetoplanar transducer, its integration into headphones and the production of headphone amplifier. The first chapter summarizes all types of electroacoustic transducers, their properties, advantages, disadvantages, and their use in practice. The second chapter deals with the classes of amplifiers. The third chapter deals with the choice of design of a magnetoplanar transducer, headphones, and selected type of headphone amplifier. The last chapter describes the production process of individual parts of the headphones, transducer and amplifier, including the final measurement.
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Design of bonding system for PCB repairs
Burian, Jaroslav ; Skácel, Josef (referee) ; Otáhal, Alexandr (advisor)
The goal of this thesis is to design a device for PCB repairing, mainly for conductive traces and soldering pads. The design focuses on mechanical construction, control unit and controling of the whole device, which is semiautomatic. A great deal of emphasis is placed on the simplicity and versality of the construction. The teoretic part of this thesis is addressed to the printed circuit board and its repairs. There are presented existing devices for repairing of those defects in the second part. The next part is focused on the design itself in terms of mechanical construction and choosing electrical components. There is described controlling of these components. Part of making mechanical components follows. Last but not least, firmware, which controls whole machine is described there. Finally, the machine was tested in the repair process of the solder pad on the printed circuit board.
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Monitoring equipment of degradation processes for material of animal origin
Chmelař, Vít ; Skácel, Josef (referee) ; Adámek, Martin (advisor)
The diploma thesis introduces the reader to the problems of chemical sensors and the basics of degradation processes in materials of animal origin. It describes some types of sensors and their principles. Atmel ATmega328 microprocessor, its parameters and programming are described. In the next part of the thesis there is a proposal and production of equipment for monitoring of degradation processes in materials of animal origin. Sample sof chicken and milk were mesuared. From these measurements, the gas concentration values were determined, where samples can be considered suitable for consumation.
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Hot plate with power regulation
Lacika, Marek ; Skácel, Josef (referee) ; Búran, Martin (advisor)
This thesis deals with issues of used hot plates and thick-film technology. The theoretical part of diploma thesis contains a theoretical analysis and description of corresponding technology and usage of materials. The practical part of the thesis focuses on the design of the resulting device, which forms design of the test and optimized hot element, the initial design of the device and the design of models for temperature simulations. Then follows description of the practical realization of the motifs and testing of the created thick-film structure on a ceramic substrate. In the last part are shown simulations of heat transfer in the proposed model of the device.
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Design of a fluidizing device for encapsulation
Lizúch, Ján ; Skácel, Josef (referee) ; Otáhal, Alexandr (advisor)
The aim of a bachelor´s thesis is to design and construct a model of fluidized bed for encapsulating a hybrid integrated circuits. A theory about hybrid integrated circuits, their packages, principles of fluidized bed and about organic materials suitable for fluidization is included in a first part of the thesis. Next parts of the thesis discusses a design of a theoretical model and its practical construction part. Thesis also contains a part about fluidization process optimalization for a specific encapsulating material.
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