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Thin device for the real temperature distribution measurement with the negastore matrix
Martinásek, Zdeněk ; Chmelař, Milan (referee) ; Rampl, Ivan (advisor)
The main task of the Master Thesis is to project a device to measure surface temperature distribution by matrix of diodes. The maeasuring device is designed for usage at places where other thermal map scanning measuring methods (e.g. thermocamera) can not be used. The key objective was to design an appropriate measuring method for selected type of sensor. This method should ensure the most effective detection of the changing value, translate received values to the digital form and send it to the computer. All circuits were powered over USB (Universal Serial Bus) together with the signalling. Calibration was needed due to different sensors technical parameters. The calibration was realized on the software level and displayed with the thermal map scanning on the computer. The final project has the form of the measuring installation with 256 sensors on 8x8 cm area.
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Analog distortion musical signals
Růžička, Matěj ; Kubánek, David (referee) ; Vrba, Kamil (advisor)
In this bachelor thesis I studied the differences in sound of valve amplifiers and solidstate amplifiers, causes of those differences, mathematical modelling the transfer characteristic of valve amplifier and then modeling it with simple diode limiter, which used several types of semiconductor diodes, Properties of those diodes were measured as well. Then I constructed limiters for both polarities of input signal, which had non-linear transfer characteristics similar to the valve amplifier and I evaluated their qualities. Then I measured simple amplifier with bipolar transistor, JFET N-channel transistor and optocoupler, Furthermore, I modified triangle-to-sine converters with bipolar transistor, JFET N-channel transistor, measured and evaluated their transfer characteristics. At the end of this bachelor thesis I described designing a diode-based functional converter and converter made from several bipolar transistors, both of these had similar shape of transfer characteristics and I evaluated their qualities by comparing weighted harmonic distortion of the output signal with output signal of tube amplifier.
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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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Led matrix 8x64
Marek, Michal ; Macháň, Ladislav (referee) ; Šteffan, Pavel (advisor)
The bachelor thesis describes what is a LED matrix and how to control them. The function of the control circuits for the LED matrixes, the function of the current controller and microcontroller programming method are delineates in the project. These include microcontroller programming via universal serial bus, changing source code parameters via local ethernet network with the ethernet connect module, using standard peripheral buses for serial transmissions and the ways of controlling LEDs using relevant libraries. Objective is to introduce a solution for LED controlling using the Windows software application and propose complex assembly includes all the necessary blocks, which provides simple operating for new users.
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Diode shaping circuit examples for educational purposes
Kasatkin, Alexey ; Petržela, Jiří (referee) ; Šotner, Roman (advisor)
Tato bakalářská práce je věnována návrhu a realizaci diodového obvodu tvarovače a diodových omezovačů obou polarity s různými zapojeními pro laboratorní. Prvním z nich je tří segmentový obvod tvarovače s aktivním prvkem (operačním zesilovačem). Obvod převádí trojúhelníkový signál na harmonický signál. Druhým obvodem je vykrajovač s proudovým sledovačem, který signál na výstupu odřízne. Třetí je jednoduchý omezovač s nezávislým nastavením úrovně omezení. Cílem konstrukce bylo dosáhnout co nejmenšího zkreslení signálu na výstupu. Funkčnost obvodů byla ověřena simulací a měřením.
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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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Universal controller for car or motorcycle dynamo
Picmaus, Jan ; Knobloch, Jan (referee) ; Červinka, Dalibor (advisor)
The thesis deals with the issue of design of an electronic controller of charging for historical cars using a dynamo. It contains theoretical analysis of the machine itself (dynamo) and analysis of a shunt wound dynamo and a seperately excited dynamo. It~is also focused on possible usage of a dynamo in various vehicles. The work compares industrially produced controllers with amateur manufacture as well as confronts their positives and negatives. All requests for the implemented controller are deduced from the analysis of the industrial and amateur controllers. The thesis consists of process plan of controller connection including the final working version and also the project and realization of a PCB as well as following description of putting the controller into practice and installation in the car. The thesis includes the project of current and voltage controllers, following adjustment and operation tests with use of the real device.
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Analog distortion musical signals
Růžička, Matěj ; Kubánek, David (referee) ; Vrba, Kamil (advisor)
In this bachelor thesis I studied the differences in sound of valve amplifiers and solidstate amplifiers, causes of those differences, mathematical modelling the transfer characteristic of valve amplifier and then modeling it with simple diode limiter, which used several types of semiconductor diodes, Properties of those diodes were measured as well. Then I constructed limiters for both polarities of input signal, which had non-linear transfer characteristics similar to the valve amplifier and I evaluated their qualities. Then I measured simple amplifier with bipolar transistor, JFET N-channel transistor and optocoupler, Furthermore, I modified triangle-to-sine converters with bipolar transistor, JFET N-channel transistor, measured and evaluated their transfer characteristics. At the end of this bachelor thesis I described designing a diode-based functional converter and converter made from several bipolar transistors, both of these had similar shape of transfer characteristics and I evaluated their qualities by comparing weighted harmonic distortion of the output signal with output signal of tube amplifier.
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Examples in environment ARMmbed
Maraczek, Patrik ; Marada, Tomáš (referee) ; Zuth, Daniel (advisor)
The bachelor’s thesis contains basic information for working with microcontroller properly in ARMmbed integrated development environment. Thesis describe microcontroller, microchips, chip’s periphery, ARMmbed environment. Also manual is written for this environment. Four examples are solved at the end of thesis to explain how extended devices and sensors are working. Devices like 4-bit seven-segmented display, LED diodes, ultrasound sensor SRF02.
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Harness tester
Smola, Tomáš ; Bohrn, Marek (referee) ; Pavlík, Michal (advisor)
This thesis deals with issue and construction of wire harness tester. In the first place, is this thesis focused on market exploration and comparison of comercial testers with concrete requirements for small batch production. I will try to find a suitable product in worldwide market, which would be convenient for company producing construction machinery. For testing switchboard harness we need to test interconnections between connectors, resistors, relays, diodes, transils and switches in the dashboard. If I can not find some product, I will try to design some new tester. My priorities will be testing all components in harness, maximum flexibility of tester for the future trends in contruction of rollers and user friendly control.
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