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Device for automatic measurement of volt-ampere characteristics
Ondráček, Petr ; Vrba, Kamil (referee) ; Lattenberg, Ivo (advisor)
The Master's thesis discusses the design and realization of electronic meter of volt-ampere characteristics using Wifi module ESP32. The device is designed to be able to measure the characteristic in the voltage range of +/- 20 V and current range of +/- 200 mA. The device is controlled by web interface. The user is able to connect to it with for example his or her smartphone. This interface enables the user to configure various parameters, including the range of measurement and the power restriction. Furthermore, it is possible to graphically display the measured characteristic and export the data. To be independent on the outer network, the ESP32 is operated as an access point, which is creating a new simple network without the internet connection. In the Master's thesis, the principle of voltage and current measurement is explained theoretically, the circuit connection of device and the printed circuit board are designed and the cover of the device is modeled. Also the process of creating the device according to the design is described and the cover of the device is printed on 3D printer. After that, the control program is designed, described and uploaded into the resulting device. Finally, the functionality of the device is tested by measuring the volt-ampere characteristics of a few components.
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GSM Module for FITkit Platform
Holinka, Milan ; Šimek, Václav (referee) ; Bartoš, Pavel (advisor)
Educational platform FITkit has plenty options of communication. Interfaces, that are not implemented on the main board of the kit, accuring regularly in the form of external modules or controllers realized in FPGA. The aim of this work is to extend the capabilities of FITkit platform about the possibility of using a GSM network via accessory module. Describes the design, composition and activation of this module, creation a library for its handling and demonstration its activities on the sample application. Finished device can transmit and receive SMS messages and connecting voice calls.
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Automated Closing System based on Lighting Conditions
Hajný, Stanislav ; Krajsa, Ondřej (referee) ; Hošek, Jiří (advisor)
The bachelor’s thesis deals with the design and implementation of automated doors based on lighting conditions. The ESP32 module is used as the main computing unit. The final design consists of a power supply part and a computing part. The first part describes the theory of IoT and solar systems. Next, the individual subcomponents are described. The next part deals with the design of the device and the last describes the final implementation and results.
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Lighting unit for PCB production
Hybler, Matěj ; Harabiš, Vratislav (referee) ; Balogh, Jaroslav (advisor)
The thesis deals with the design of microcontroller driven lighting unit for the printed circuit board creation, using exposure of the applied layer of the photoresistive material. Main part is dedicated to design of the control unit, which can be operated either in automatic or manual mode, then its source code for microcontroller written in C language and the selection of suitable source of UV radiation. It also describes the design of the entire device, methods and results of individual measurements to determine the achievable quality of the resulting PCB.
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Basic measurement of bipolar and unipolar transistor
Kaňa, Leoš ; Šebesta, Jiří (referee) ; Dřínovský, Jiří (advisor)
In terms of the better effectiveness in the sphere of transistor characteristics measuring, no matter unipolar (FET) or bipolar (BJT), in laboratory conditions and their better understanding in terms of thrash out a subject matter is desirable have to available workplace let us say preparation enabling this kind of measuring with modifiability wiring and with possibility to change measured component. This thesis isn‘t focused only on development of this kind of universal component for measuring but simultaneously contains brief summary about the theory and parameters of transistors. Next aim is the development and realisation of static characteristic measuring program in VEE 8.0 Pro environment. Finally the complex laboratory exercise has to be done for measuring of bipolar and unipolar transistor’s static characteristics include programs for automatic measuring. For developing of DPS was used developing system named Eagle which gives us instrument with sufficiently accuracy. In thesis is contained theory needed for measuring and programming. Except possibility of measured component change we can change transistor connection in circuit on the board. This change is available for BJT (CE, CB, CC) and unipolar JFET (CS, CG, CD) transistor’s.
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Design of switch-mode audio power amplifier
Macek, Libor ; Petržela, Jiří (referee) ; Brančík, Lubomír (advisor)
This paper is divided into four parts. The first part deals with the description and explanation of the general principles of switching concept amplifiers. The second part is occupied with design of Class-D amplifier, a description of each block and calculations. A significant part of proposal of amplifier is based on simulations from programs Pspice and Filter Free. In the third part deign of power unit is discussed. The last part is focused on the measurement results on a prototype device.
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Control of graphic OLED display with Atmel microcontroller
Bartošík, Vladislav ; Lattenberg, Ivo (referee) ; Hanák, Pavel (advisor)
This Master's thesis deals with design and a realisation of a device controlling an OLED display, Densitron DD-25664-1A. This display has a resolution of 256 x 64 pixels and allows displaying of 4-bit grayscale. The proposed utility software implements the initialization and termination functions, two sets of fonts { Latin and Greek letters and functions for rendering graphics and text. The result of the project is a device with the controlling software.
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Embedded Control Unit for Instrumentation of Laboratory Appliance
Voda, Zbyšek ; Strnadel, Josef (referee) ; Šimek, Václav (advisor)
Aim of this thesis is modular design of control system for Golem device, which is used for drug research. Several modules with specified controlled area were designed. They communicate using CAN bus and are controlled by Raspberry Pi computer. The thesis includes PCB design and control firmware for modules, backend application for Raspberry Pi, which provides application interface, and simple protocol used for communication between modules. Designed system was tested in simulated environment.
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Thermometer for SW/HW Platform FITkit
Čižinský, Vojtěch ; Šimek, Václav (referee) ; Vašíček, Zdeněk (advisor)
The real progress in temperature measurement was made in 20th century. This specialization has since affected all domains of human doing and improved many of processes. This bachelor thesis deals with the design of a measuring module, which has to be plugged to a FITkit platform, and the implementation of the program, which communicates with the module. There will be a couple of various temperature sensors placed on the module, with various ways of the temperature presentation.
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Semiautomatic Dispenser Application in Flexible Low Series PCB Assembly in SMT
Prikryl, Petr ; Zatloukal, Miroslav (referee) ; Starý, Jiří (advisor)
The aim of this thesis is solving the issue of introducing the Dotmaster semi-automatic dispenser into the flexible low series surface mount technology assembly of printed circuit boards. The first part of the thesis deals with the issue of introduction to the dispension of solderpastes, adhesives and packaging materials. The second part is focused on the description of the Dotmaster semi-autamatic. The last part is devoted to actual measuring and observation with the device using PD 860002 SA adhesive made by Heraeus company and SAC solder paste by Kester company. Showing the characteristics of dependecies of the shape of the dispensed adhesive and solder paste on several parameters of dispension follows.
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