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Electronic notice board LCD
Chmelař, Petr ; Franek, Lešek (referee) ; Bradáč, Zdeněk (advisor)
This paper focuse at market research with digital signages, kiosks, and the subsequent suggestion directed on the concept of the new system and its hardware parts and software. The aim of this work is grounded on creating the concept of electronic boards, which is derived from the market research. The concept of the system is describing the principle of functioning of the digital signage, possibilities of controlling and system administration itself. The suggestion of the hardware part of the system contains the selection of appropriate mechanism for realization of the software part of the system and the proposal of controlling and signaling aspects, which are suitable for communication with users.
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Design efective power speed controller for 3-phase motor
Uchytil, Filip ; Hanák, Pavel (referee) ; Lattenberg, Ivo (advisor)
This paper deals with the regulation of revolution of the asynchronous three phase engine with the frequency transformer. Firstly we will look into individual types of engines, the ways of regulation of the engines, the measuring of contemporary voltage and current at the engine and programming the ATMEGA64 microprocessor. The supervision is beeing handled by the PWM signal, which ensures low consumption of our circuit. The outputting part is comprised by the MOSFET transistors. The thesis devotes to communication of the ATMEGA64 processor via the USB port. The transmission ratio, voltage and even the contemporary current is displayed on the LCD monitor. The outcome of this thesis is the effective regulation of the asynchronous three phase engine, with the possibility of tracking all of the parameters mentioned above which are shown on the LCD display.
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USB miltimeter with microprocessor
Samek, Martin ; Kolka, Zdeněk (referee) ; Kovář, Jan (advisor)
Topic of my terminal labour is a proposion of multimeter and its resulting connection by the help of bus USB. When proposing the multimeter there was a tendency to use a minimal number of component parts to conserve a good protection against a bad usage in application. The most widespread busbar USB is used for connection of the multimeter and a computer. Standard HID is used for communication, for that it is not neccessary to install any system drivers.
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Meter of powerline quality
Samek, Martin ; Horský, Pavel (referee) ; Kolka, Zdeněk (advisor)
The subject of graduation thesis is a design of line analyser according to standard EN61000-4-30 class A. The analyser is determine to be used for quality control of supplied electric power which is, during electric power transmission, affected by several disturbances. Power line analyser should measure single-phase and three-phase network parameters in LV and HV systems. Measured parameters can be shown on the full colour TFT display, stored in the device memory or sent to other devices such as PC. For communication between the device and PC the USB, Ethernet or RS485 interface are used.
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