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Wireless IR Sensor for Area Invasion Detection
Suchý, Lukáš ; Kubíček, Michal (referee) ; Kolouch, Jaromír (advisor)
The target of this Bachelor thesis to design a security system for detection of the monitored space disruption, containing several battery powered sensors which are connected to central unit. From Bachelor thesis is evident, that for communication is to be used integrated circuit SI4432. Sensor detects motion in distance no less than 5 m and sends reports of the space disruption to central unit where this information will be processed. After that the user will be informed by the central unit. Sensor unit should be battery powered with lifetime in years. In conlusion, the system it tested in real work.
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Tutorial kits for course Powering electronic devices
Pochobradský, Jakub ; Švábeník, Petr (referee) ; Kubíček, Michal (advisor)
The goal of this bachelor thesis is to make a design of tutorial kits with a charge pump, DC/DC converter and a reference voltage and current sources that could be used in laboratory classes. In the first part basic principles of a charge pump and DC/DC converter are described. The second part is related to integrated circuits that are specific for construction of charge pumps and DC/DC convertors. The third part contains design of printed circuits.
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Photographic battery flash unit
Dašovský, Jakub ; Kubíček, Michal (referee) ; Kolouch, Jaromír (advisor)
The main subject of this bachelor thesis is the design of a flesh unit with a maximum output performance of 400Ws. Regulation is performed by the length of flash. The source of energy used is generated by Li-Ion cells with a total voltage of 21 V and capacity of 5200 mAh. Part of this design include circuits that provide power control to the flash tube, the resizing of the DC voltage (changing), the charging and monitoring of the minimum battery voltage.
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Design of triple laboratory power supply
Gerbel, Patrik ; Kubíček, Michal (referee) ; Brančík, Lubomír (advisor)
This semestral thesis deals with designing triple laboratory power supply. There are three outputs in the device. One of them is built with switching regulator LTM4605 and it‘s output voltage can be regulated in the range of 0 to 6 volts. Maximal output current is 5A. The rest is realized as linear with voltage regulated output of 0 to 30V and adjustable current limitattions in range of 0 to 3 A. Output parameters are registered by double microcontrollers and shown on two LCD displays.
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Ultrasonic anemometer
Dvořáček, Michael ; Kováč, Michal (referee) ; Kubíček, Michal (advisor)
Work describe principles and problems of the realization ultrasonic anemometer. It's described methods of computation speed wind and its correction. In favor of realization are used ultrasonic transducers and microcontroller ARM Cortex-M3. The work treats PWM signal generating, its analog filtration, amplification and transmitting. On receiving part there are low voltage amplifier and comparator. Developing code is described by flowcharts.
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Accumulator Charger for Bicycle
Kufa, Jan ; Kubíček, Michal (referee) ; Šebesta, Jiří (advisor)
The aim of this thesis is to suggest a suitable way of charging mobile devices by using bicycle. In the first part of bachelor thesis there are discussed various options for charging the battery on a bicycle, described differences between the alternator and dynamo, and finally the different types of batteries. The second part describes in detail used blocks that were used in the engagement and the reasons of their choice. In the last section there are described the final parameters of the charger.
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Templates of DC/DC Converters
Skoupý, Petr ; Kubíček, Michal (referee) ; Šebesta, Jiří (advisor)
The aim of this thesis is a suggestion and a realization of universal DC/DC convertor with three chips. The first part of this work is focused on the progressive analysis of the power and control part, as function blocks and diagrams. The greatest emphasis is placed on the three circuit wiring for step-down, step-up and inverting convertor. It was necessary to choose the right control circuit, which is available on the market and fulfil all our requirements. Progressive analysis of outer peripheral parts calculations and selecting for the convertor with specific parameters and load characteristic and creation of universal PCB with shouldering is the final realization.
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RS-232 Serial Data Transmitter
Paul, Martin ; Kubíček, Michal (referee) ; Kolouch, Jaromír (advisor)
The aim of my bachelor thesis is to create an RS-232 transmitter in the Xilinx ISE WebPACK development system with the possibility to set the details of transmitted data by input signals. It is necessary to explore demands of the designed transmitter in terms of consumption of the structural components in the PLD network. The function test of the project was done by the help of development kit.
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COMMUNICATION CHAIN SUB-BLOCK MODELLING AND IMPLEMENTATION IN FPGA
Kubíček, Michal ; Jalovecký, Rudolf (referee) ; Pinker,, Jiří (referee) ; Kolka, Zdeněk (advisor)
Most modern clock and data recovery circuits (CDR) are based on analog blocks that need to be redesigned whenever the technology process is to be changed. On the other hand, CDR based blind oversampling architecture (BO-CDR) can be completely designed in a digital process which makes its migration very simple. The main disadvantages of the BO-CDR that are usually mentioned in a literature are complexity of its digital circuitry and finite phase resolution resulting in larger jitter sensitivity and higher error rate. This thesis will show that those problems can be solved by designing a new algorithm of BO-CDR and subsequent optimization. For this task an FPGA was selected as simulation and verification platform. This enables to change parameters of the optimized circuit in real time while measuring on real links (unlike a simulation using inaccurate link models). The output of this optimization is a new BO-CDR algorithm with heavily reduced complexity and very low error rate. A new FPGA-based method of jitter measurement was developed (primary for CDR analysis), which enables a quick link characterization without using probing or additional equipment. The new method requires only a minimum usage of FPGA resources. Finally, new measurement equipment was developed to measure bit error distribution on FSO links to be able to develop a suitable error correction scheme based on ARQ protocol.
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Wireless interface to control digitally controlled components
Halbich, Václav ; Kubíček, Michal (referee) ; Ševčík, Břetislav (advisor)
e bachelor thesis deals with problem of wireless communication between digitally controlled components. Universal Bluetooth modules are used to construct the multifunction wireless interface. The first part is focused on description of SPI, I2C, Up & Down data bus. Subsequently, the selected Bluetooth modules are described. Finally, the application of wireless interface to control of digital potentiometers is discussed.
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