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DC/DC converter 12V/300V
Žurek, Jan ; Hanák, Pavel (referee) ; Kubánek, David (advisor)
This Bachelor´s Thesis is about switch power supplies theory. It contains comparation with power supplies made of linear components and briefly describes principals of each type. Bigger attention is devoted to fly-back engagement, on which´s basic is then in practice designed particular switch power supply. All key components are counted, including initiation of important species interaction, especially of transformator, MOSFET semiconductor triode, output diode, and there are chosen important components, which are subsequently implemented into the particular switch power supply engagement. This blocking engagement turned out to be functionless. That was why I decided to use engagement called half-bridge, which was viable.
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Driver for ultra-bright white LED
Heralecký, Lukáš ; Čožík, Ondřej (referee) ; Levek, Vladimír (advisor)
The aim of this thesis is to study the possibilities of controlling high-brightness white LEDs using circuits operating at high voltages. The job itself is a division of existing light sources and mainly focus on semiconductor technology LED. The following describes the voltage of DC / DC and AC / DC. The work contains a description of the three high-voltage inverters are designed for power LEDs. Finally, it created a draft scheme of the PCB. As a control circuit is chosen ATMEGA 162 microcontroller from Atmel and source for LED diode is formed HV9910 and HV9861 circuits.
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Wireless IP Camera With a Raspberry Pi
Sidor, Peter ; Botta, Miroslav (referee) ; Červenka, Vladimír (advisor)
This thesis deals with the developing of an additional module for Raspberry Pi and with optimization of the efficiency of powering the whole device. The thesis also deals with the acceleration of the Operating System which is used by the entire device. The first part of this work describes the principles of functioning of the sensors and DC/DC converters. The work focuses on the selection of proper components for this module. The Printed Circuit Boards of the selected DC/DC converters were created in the program Eagle for efficiency measuring. As for the next part, there was created a program for turning on and off the entire device. This part presents a description of the possibilities of accelerating the operating system for Raspberry Pi. The last part of the thesis focuses on design of the final operating system.
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Voltage convertors for microprocessor devices
Kus, Václav ; Kolouch, Jaromír (referee) ; Michálek, Václav (advisor)
The task of this semester work is carried out summary converters DC / DC power supply suitable for small microprocessor devices with LCD display. As the input source voltage is 9V battery or two batteries (3V). The market has recently appeared a lot of manufacturers of these drives but more detailed information often not available. This work I wanted to help in selecting the correct convertor for your microprocessor equipment. The aim is not to describe all DC / DC converters. Another point of this work is the proposal of two DC / DC converters powered from 9V battery, and two converters fed from two batteries 1.5V. These converters are measured throughout the operating range of output values. This work also contains the documentation for the construction and use.
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Alarm device
Demjanics, Ferenc ; Drexler, Petr (referee) ; Szabó, Zoltán (advisor)
Timer is an equipment that allows us to provide time measure. There are in all-day use a plenty of timers, but their use is ussually limited for one purpose only. Because of this I decided to compile a timer which allows to apply it for an individual needs. This granted a wider spectre of use in real life. We used a microcontroller from Atmel, and also a DCF77 signal (atomic time signal)receiver and decoder. Further, we required a real-time circuit, DC/DC converter, and a powerswitch from manufacturers STmicroelectronics, and Linear Technology,respectively.For the imaging unit we used a graphic LCD connected via an I2C bus, which is commercially available spare part for mobile phones. Following the design we compiled and revived a hardware part of the device. After a succesfull revive, we gradually compiled a program for microcontroller. The program defines a processes for run of the device. It was written in programming language C, with use of compiling enviroment avr studio 4
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Nixie clock
Ščípa, Samuel ; Novotný, Radovan (referee) ; Levek, Vladimír (advisor)
This thesis focuses on the design and implementation of a nixie clock. In the introduction, the thesis deals with the history of the origin and the principle of the function of this vintage technology. It describes in detail the function and design of the support and control circuits to operate these character discharge tubes. It addresses the design and implementation of the hardware part of the clock. Further, the software part of the device is discussed in detail, which provides the normal functionality of the clock, such as stopwatch, alarm, timer, temperature measurement, supplemented with modern features such as Wi-Fi, RGB backlight a USB-C for power and programming. The final stage is the implementation and testing of the finished device.
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Wireless IP Camera With a Raspberry Pi
Sidor, Peter ; Botta, Miroslav (referee) ; Červenka, Vladimír (advisor)
This thesis deals with the developing of an additional module for Raspberry Pi and with optimization of the efficiency of powering the whole device. The thesis also deals with the acceleration of the Operating System which is used by the entire device. The first part of this work describes the principles of functioning of the sensors and DC/DC converters. The work focuses on the selection of proper components for this module. The Printed Circuit Boards of the selected DC/DC converters were created in the program Eagle for efficiency measuring. As for the next part, there was created a program for turning on and off the entire device. This part presents a description of the possibilities of accelerating the operating system for Raspberry Pi. The last part of the thesis focuses on design of the final operating system.
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