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Design and construction of double laboratory power supply
Klein, Miroslav ; Šebesta, Jiří (referee) ; Brančík, Lubomír (advisor)
This semester thesis deals with design of double laboratory DC power supply with adjustable voltage and current limitation. Power supply can work in two states. First state allows regulation of output voltage from 0V to 40V and current limitation from 0A to 3A. In second state the range of output voltage is from 0V to 18V and output current can be set from 0A to 6A. Both supplies are galvanically separated and can work independently, or can be combined. Whole power supply is digitally controlled by microcontroller.
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Audio D/A converter with external control using microcontroller
Špaček, Jan ; Stifter,, Jiří (referee) ; Kratochvíl, Tomáš (advisor)
This diploma thesis deals with the design of a laboratory measurement tool with ADC converter for audio and low frequency signals. In the introduction part a theoretical background of the ADC and DAC conversions are outlined. In the next chapters the technical solution of the laboratory converter is presented, including DAC with integrated circuit AD1852 and completed with digital audio receiver CS8416. This circuit secures compatibility with external audio devices with digital interfaces, like SPDIF or AES3. The digital receiver and audio DAC are added with serial communication interface for setup of the most audio and input parameters. This setup is operated by external microcontroller ATmega32 and original firmware. The thesis contains block diagram and schematic layout of the laboratory converter, including complete technical documentation for the construction and design.
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Extension interfaces for FPGA developent board
Čáslavský, František ; Pavlík, Michal (referee) ; Bohrn, Marek (advisor)
This work deals with design of expansion modules for development kit Spartan-3 Starter kit. The objective of the work is to design modules with audio input and output and modules with video input and output. This work consists of exploring possibilities of connecting the modules, designing the modules, choosing suitable components for production of the modules, manufacturing prototypes, creating of software and user manuals. These modules will be utilized in lessons and will contribute to the possibility of exploring the VHDL programming language in greater depth.
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Audio amplifier with digital input and power and headphone output stage
Abrman, Milan ; Šotner, Roman (referee) ; Kratochvíl, Tomáš (advisor)
The aim of this thesis is design and construction of amplifier for high quality home listening experience. Device is able to process both analogue signal and high sampling frequency digital input with high audio bit depth. Scope of the thesis covers the design of all the functional units: input signal circuit, S/PDIF receiver, D/A converter, high performance class D amplifier and precise headphone amplifier for dynamic sound presentation. Thesis also cover design of all control circuits containing rotary encoder with button input, microcontroller unit, digital potentiometer and segment display.
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Design of EMC optical converter
Štěpánek, Adam ; Hruboš, Zdeněk (referee) ; Krutílek, David (advisor)
Master's thesis is focused on designing optical converter for EMC measurement transfering signal through noisy enviroment. First part contains analysis of electromagnetic interference and its coupling and measurement, especially types of probes for interference maesurement. Next part passing through designing of optoelectric and electrooptic converter with digital intensity modulation. Last part is about realization of optical converter.
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Analog input device for industrial automation
Nekovařík, Jakub ; Šír, Michal (referee) ; Bradáč, Zdeněk (advisor)
The main subject of this bachelor thesis are design and implementation of the device, which is used to convert digital values to analog output value in the range 0-10V. This actual trasformation arises in electrical component called Digital-to-Analog Converter. There is a separate chapter, which presents theory and problems of varios types of converts. The following chapters theoretically analyse design of each parts of the device. The conclusion of this thesis deals with specific proposals of used electrical components and a description of the software equipment.
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Measuring Unit Controlled by Computer
Žižka, Josef ; Dřínovský, Jiří (referee) ; Šebesta, Jiří (advisor)
The object of this work is to meet readers with the basic principle and solution of universal measuring cards for personal computer, project and realise own „Measuring Unit Controlled by Computer“. Comparing parameters nominated unit with commercial using devices. The project describes contituent elements like set analogue inputs for measuring of voltage and current, analogue outputs, digital inputs, digital outputs and counter. The work deals with using standard interface USB for communication between measure unit and host by personal computer. And explanations control program of the microprocessor.
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Audio D/A converter used for laboratory measurements
Abrman, Milan ; Stifter,, Jiří (referee) ; Kratochvíl, Tomáš (advisor)
The aim of this thesis is design stereo digital to analog convertor for school laboratory usage. Scope of the thesis covers the design of all the functional units: input signal circuit, S/PDIF receiver, D/A converter, high quality analog output stage with active low pass filter. Thesis also cover design of all control and indicating parts containing microcontroller with control parts, alphanumeric OLED display and setting indicators.
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DAC converter for CD/DVD player
Vomočil, Vojtěch ; Brančík, Lubomír (referee) ; Kratochvíl, Tomáš (advisor)
Bachelor thesis deals with the design and construction of D/A converter used in the area of audio signals with digital interface SPDIF. In the theoretical part of the thesis the design of block structure of the D/A converter module is included with assumption on realization by receiver of the digital signal Cirrus Logic CS8414 and D/A converter CS4334. In the practical part of the thesis the detailed wiring scheme of D/A converter, printed circuit board design, parts layout and construction design for implementation are presented. In the experimental part of the thesis the functionality of the D/A converter is tested and verified including the measurement results. Measured results are presented in the form of standard protocol. D/A converter can be used as stand alone module and connected to CD or DVD player. At the converter outputs audio amplifier and speakers can be connected.
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