National Repository of Grey Literature 45 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
SMD Rework station
Szabó, Michal ; Roubal, Zdeněk (referee) ; Szabó, Zoltán (advisor)
This thesis describes the theory of solder joint and conditions under which it is formed correctly. Further, methods of hand soldering are discussed, and possibilities of temperature regulation of soldering tip are analyzed. Methods of creating a soldering station and its key features are depicted. In practical part, the solution of how to create a soldering station with soldering iron, desolder gun and heatgun is given and is constructed. While testing a defect is found that prevents the power portion of soldering station to function properly and prevents completion.
Digitally controlled laboratory power supply
Spáčil, Petr ; Drexler, Petr (referee) ; Szabó, Zoltán (advisor)
This bachelor thesis deals with the divison and research of DC voltage sources. It also describes how linear and switch mode power supply works. The 8-bit ATmega16 microcontroller from the ATMEL family of AVR microcontrollers is further described. Part of this bachelor thesis is the desing of the laboratory power supply source 30V / 3A, which is in the topology of switched pre-regulation. The ATmega 16 microcontroller provides measurement and displaying values on the display.
Wireless weather station
Hrabovský, Michal ; Marcoň, Petr (referee) ; Szabó, Zoltán (advisor)
This bachelor thesis focuses on a plan of a wireless meteostation composed of internal and external unit. Meteostation is supplied by a battery and photovoltaic panel It measures temperature, humidity, pressure, precipitation, speed and direction of wind. Measured data are sent to the internet through wi-fi connection. Internal unit measures temperature and humidity. With the aid of wi-fi connection the internal unit loas data from the internet and then the data show up on display. Measured data can be shown on phone. At the beginning of theoretical part, meteorology will be analysed. Afterwards, this work describes physical principles and the method of measurement of physical quantities which are measured by the meteostation, Internet of Things and cloud services. The second part focuses on the description of meteostation plans. Then it describes hardware and software that was used in the mrtestation. Finally, it describes the schrmr of the device. Third part focuses on construction of the device, 3D printing of its parts.
IoT Control Module
Haman, Martin ; Marcoň, Petr (referee) ; Szabó, Zoltán (advisor)
This bachelor thesis deals with the research of the possibilities of wireless data transmission from the controllers IoT modules and their construction. At first there is compared wireless technologies, network protocols, their suitability depending on the application of the IoT control module. Then it is designed the IoT control module using a Wi-Fi module (based on Espressif ESP8266 integrated circuit) communicating over a MQTT network protocol. Thesis continue with selection, compilation of the firmware, creation of script for control heating system, descriptions of methods for controlling the IoT control module and display of measured data. The possibilities of creating a MQTT broker and security of data transmission are described below. In conclusion is documented and verified its functionality.
Remote wireless control with encoded transmission
Polách, Matěj ; Hanák, Pavel (referee) ; Szabó, Zoltán (advisor)
This thesis deals with a wireless transmissions issues. It describes the device designing which communicate bidirectionally in free frequency band of 2.4 GHz. It deals with the modulation methods, coding and other wireless transmissions necessities and about prefabricated RF modules properties. It solves voltage level shifting which is essential for SPI communication between microcontroler and module.
Temperature and humidity measuring station for Ionmeter
Kadaňka, Karel ; Roubal, Zdeněk (referee) ; Szabó, Zoltán (advisor)
This bachelor’s thesis describes the design of meteorological station of Ionmeter. Meteorological station is controlled by the Arduino platform, which evaluates the measured data and sends them wireless into the initial concept of Ionmeter. In the first part, the particular measured variables (temperature, humidity, pressure, carbon dioxide concentration, UV radiation and amount of dust particles) are described. It also describes the brief principle of the formation of air ions and their influence of the human organism. The following chapters are dedicated to the description of each component, the description of the weather station program and the initial concept of Ionmeter. The last chapter describes the construction of the meteorological station itself.
Small Coil Winding Machine
Ihnát, Kryštof ; Friedl, Martin (referee) ; Szabó, Zoltán (advisor)
This work is about designing a small coil winding machine for the school workshop. The first part consists of market research, a comparison of winders, and an explanation as to how they work. It is followed by short chapter about the inspiration for the design and construction. It also includes the parts that were used as well as peripheries. These include the most important component; stepper motors. In the next part, the prototype and subsequent revisions are described, as well as the most important parts of the code and construction of the coil winder itself and it's parts. In the end, there is chapter about it's operation.
High-intensity strobe light source
Rehák, Ondrej ; Drexler, Petr (referee) ; Szabó, Zoltán (advisor)
This bachelor’s thesis discusses influence of high-intensity light strobes on human. Content of this thesis contain description of human sight and reaction of human sight to high-intense light strobes and consequently using this information to create device for temporal disable or disorientate of attacker. High-intensity light strobe source was designed to be light-weighted and compact. The case was designed and made on 3D printer, device is powered by lithium-polymer battery.

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