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Stepper motor driver with feedback for positioning platform
Doležel, Michael ; Král, Vojtěch (referee) ; Barcík, Peter (advisor)
Tato bakalářská práce se zabývá návrhem a stavbou uzavřené regulační soustavy pro výšku a azimut optomechanické platformy. Cílem je porovnat rotační senzory a následně navrhnout kontroler pro krokový motor. Prototyp regulačního systému byl postaven s využitím platformy Arduino, řadiče krokového motoru DRV8825, krokového motoru NEMA-17 a hallového senzoru AEAT-9922 pro měření rotace. Prototyp dokáže otáčet krokovým motorem s rozlišením 0.056°, což je maximální přesnost řadiče DRV8825 při použití mikrokrokování 1/32. Deska finálního řadiče byla přepracována tak, aby zahrnovala rozhraní SPI-4 pro hallový senzor AEAT-9922. Deska obsahuje řadič krokového motoru L6470H s mikrokrokováním 1/128 a má rozlišení 0.014°.
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Design and realization of measuring device for determination of human arm force depending on elbow joint angle.
Zezula, Miroslav ; Vlk, Miloš (referee) ; Krejsa, Jiří (advisor)
The goal of this bachelor’s thesis is design and realization of measuring device for determination of human arm force depending on elbow joint angle. Used measuring method allows to measure this relationship during one continuos movement from one limit position to another. Simplicity of single measurement run allows to obtain a large set of values and evaluate it statistically. This thesis contains a detailed technical description of the measuring device. Actual force and position of hand are measured by electric transducers. Measured values are captured using Spider8 data acquisition system. Based on experiences from first test measurement, the measuring device is modified and drive unit is added. This drive unit is automatically started by a signal from data acquisition system.
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Design of electronics and control for touch screen devices tester
Hrůzek, Jan ; Bednařík, Josef (referee) ; Krejsa, Jiří (advisor)
This thesis deals with a complex design of control electronics for device dedicated to testing touch panels and subsequent implementation of basic communication interface between microcontroller and service PC. There is a detailed analysis of selection procedure of suitable sensors for testing device and of suitable components for control and power circuits as well. The connection and interconnection of all necessary components is solved, including the temporary replacement of the main microcontroller with the Nucleo development board. The UART protocol is used as a tool for communication with the operating PC and Python is used on the operating PC side. It also outlines the extension of the content of this thesis when extending the system with a second device.
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Digitally controlled filter
Rez, Jan ; Szabó, Zoltán (referee) ; Friedl, Martin (advisor)
This bachelor's thesis deals with design of a functional prototype universal digitally controlled analog frequency filter 2th order. Part of the design is the selection of appropriate filter topology diagram and selection of an integrated circuit. Universal filter will contain lowpass, highpass, bandpass and notch filter. The filter is tuned in cutoff frequency from 100 Hz to 15 kHz. The bachelor's thesis focuses on the circuit analysis of selected concrete structure of universal filter and possibilities of digital control filters. The practical part of this thesis includes PCB design, control software for filter and graphical representation of measured results.
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Digital controlled resistor
Sedlář, Petr ; Petržela, Jiří (referee) ; Šotner, Roman (advisor)
This master´s thesis deals with the design of the control circuits for digital potentiometers and their application in analog systems. Digital potentiometers are three-terminal resistors with an adjustable center connection. The digital potentiomneters enable to drive logic gates, LED drivers, LCD drivers, analog switches etc. Controlling of these mentioned devices is possible by the I2C 2- wire serial bus (invented by Philips). The digital potentiometers are used to control of the primary parameters like cut-off frequency and quality factor in the state variable filter and cut-off frequency in a passive filter. Both filters are simulated in PSpice and then compared with the measured results. Next parts of this master's thesis are a computer program and a exemplary protocol.
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Light and effect technics control
Nedoma, Jakub ; Frýza, Tomáš (referee) ; Fedra, Zbyněk (advisor)
The aim of my bachelor degree work was to design and manufacture a mixing console for controlling the entertainment lighting and show technics (RGB lights, fog producing, lasers etc.). This console is compatible with all kinds of digital show appliances via DMX512 protocol.
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Frequency filters controlled via microprocessors
Bronec, David ; Kincl, Zdeněk (referee) ; Biolková, Viera (advisor)
This thesis is focused on the microprocessor-controlled frequency filter project. The main goal of the thesis is to present basic terms and principles of frequency filters and active frequency filters for cascading synthesis. Furthermore, the work contains information on digital potentiometers. The thesis includes circuit simulations and a project of connecting with a printed circuit board. The last chapter contains the results of the measurements.
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Design of electronics and control for touch screen devices tester
Hrůzek, Jan ; Bednařík, Josef (referee) ; Krejsa, Jiří (advisor)
This thesis deals with a complex design of control electronics for device dedicated to testing touch panels and subsequent implementation of basic communication interface between microcontroller and service PC. There is a detailed analysis of selection procedure of suitable sensors for testing device and of suitable components for control and power circuits as well. The connection and interconnection of all necessary components is solved, including the temporary replacement of the main microcontroller with the Nucleo development board. The UART protocol is used as a tool for communication with the operating PC and Python is used on the operating PC side. It also outlines the extension of the content of this thesis when extending the system with a second device.
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Digitally controlled filter
Rez, Jan ; Szabó, Zoltán (referee) ; Friedl, Martin (advisor)
This bachelor's thesis deals with design of a functional prototype universal digitally controlled analog frequency filter 2th order. Part of the design is the selection of appropriate filter topology diagram and selection of an integrated circuit. Universal filter will contain lowpass, highpass, bandpass and notch filter. The filter is tuned in cutoff frequency from 100 Hz to 15 kHz. The bachelor's thesis focuses on the circuit analysis of selected concrete structure of universal filter and possibilities of digital control filters. The practical part of this thesis includes PCB design, control software for filter and graphical representation of measured results.
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Light and effect technics control
Nedoma, Jakub ; Frýza, Tomáš (referee) ; Fedra, Zbyněk (advisor)
The aim of my bachelor degree work was to design and manufacture a mixing console for controlling the entertainment lighting and show technics (RGB lights, fog producing, lasers etc.). This console is compatible with all kinds of digital show appliances via DMX512 protocol.
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