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Wireless charging station
Navara, Albert ; Dvorský, Adam (referee) ; Šteffan, Pavel (advisor)
The topic of this thesis is the design and construction of a wireless charging station compatible with the Qi standard with the possibility of delivering higher power. A wireless receiver is also designed and constructed to evaluate the capabilities of the wireless charger. Before the design itself, the theory of transmission and procedures for selecting topologies and components are discussed in the thesis. In the design of the transmitter and the receiver, microcontrollers are used, which take care of communication with each other and set the required parameters. The assembled transmitter is tested with a receiver in the form of an LC circuit, with a purchased receiver, and with the designed receiver within various distances and deviations of the transmitter and the receiver. The final product is fitted into a plastic box printed on a 3D printer.
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Electronic Cigarette
Brím, Lukáš ; Šteffan, Pavel (referee) ; Junasová, Veronika (advisor)
This bachelor thesis focuses on the design of an electronic cigarette. The thesis describes the parts that make up an electronic cigarette. The whole device is powered by a battery cell that can be charged in the device via a USB connector. The designed device works on the principle of heating a resistive wire in the form of a spiral. The whole device is controlled by a microcontroller, which makes it possible to control the different modes of operation. The device can operate in three modes namely bypass mode, temperature control mode and watt mode. The setting of the modes is done using tactile switches and then the set power or temperature is displayed on the display.
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Electronic Cigarette
Brím, Lukáš ; Šteffan, Pavel (referee) ; Junasová, Veronika (advisor)
This bachelor thesis focuses on the design of an electronic cigarette. The thesis describes the parts that part of an electronic cigarette. The whole device is powered by a battery cell that can be charged in the device via a USB connector. The designed device works on the principle of heating a resistive wire in the form of a spiral. The whole device is controlled by a microcontroller, which makes it possible to control the different modes of operation. The device can operate in three modes namely bypass mode, temperature control mode and watt mode. The setting of the modes is done using tactile switches and then the set power or temperature is displayed on the display.
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Autonomous control system for composite materials heating
Lapčák, Adam ; Levek, Vladimír (referee) ; Šteffan, Pavel (advisor)
This thesis focuses on designing an autonomous system intended for heating surfaces made of conductive composite material. The design involves smart electronics design for integration into distribution boards and the ability to control power switching elements. Emphasis is also placed on the possibility of remote system control via the internet network. For an easy deployment in any location, the autonomous system will use a mobile network. System control will be realized with a dedicated HTTP API server along with a custom user application.
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Effect of electromagnetic compatibility on the operation of automotive LED drivers
Vinklerová, Viktorie ; Šteffan, Pavel (referee) ; Levek, Vladimír (advisor)
The diploma thesis deals with electromagnetic compatibility, its bonds, measuring devices and interference sensors. Furthermore, the thesis includes a discussion of nearfield probes, standards CISPR25 and TEM chamber methods. It describes two integrated circuits NCV78964 and NCV78514 LED drivers from onsemi and their modules. The aim of the work is to design the measurements, then to implement and evaluate them. Finally, to optimize the operating parameters of the drivers with respect to both EMC and driver functionality.
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Wireless charger based on the NFC Forum WLC 2.0 standard
Rada, Vojtěch ; Junasová, Veronika (referee) ; Šteffan, Pavel (advisor)
This diploma thesis is focused on wireless charging technology according to the Wireless Charing 2.0 standard by the NFC Forum and the design of an ASIC circuit of a device functioning as a listener, where the primary emphasis is placed on the digital design of this circuit. In the beginning the work deals with a general theory, gradually discussing all the standards from the NFC Forum that are necessary for the control protocol design according to the Wireless Charging 2.0. Subsequently, the analysis of a real communication in the development kit for this standard is conducted, based on which the system design of the digital circuit is made. The designed circuit is described by VHDL language and verified by running the basic simulations to check the functionality of the designed parts of the circuit. In the final part of the thesis, a prototype module with the proposed system is fabricated, implemented in an FPGA with a connected battery charger circuit and its functionality is tested in practice.
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Mains charger with variable output voltage.
Dittrich, Marek ; Šteffan, Pavel (referee) ; Boušek, Jaroslav (advisor)
Nowadays every portable electronic device, tool or machine is powered by some type of accumulator. It is not possible to standardize types because the use of batteries is influenced by the power output, capacity, weight or price. They also differ in charging voltage, depending on their chemical composition. For this reason, it is often necessary for each type to have its own charger. In this case, an attempt has been made to simplify charging and reduce charger procurement expenses by designing a charger with adjustable voltage from 2.6 V to 20 V. This range can cover the charging of most types of accumulators available on the market.
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Control of house heating
Hnyk, Marek ; Šandera, Josef (referee) ; Šteffan, Pavel (advisor)
The aim of the final thesis is a proposal and implementation of a system which would enable a heating control on the basis of data gathered by monitoring of particular rooms inside a building. In particular, it is focused on water measurement within the heating system, TUV (non-potable hot water) and the temperature within the space of residential rooms. The system headquarters must enable an automated saving of the measured data. Selected temperature figures will be made accessible by a web interface and continuously saved on the web server.
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