|
|
Time synchronisation of stm32 microcontrollers
Kratochvíl, Jakub ; Havránek, Zdeněk (referee) ; Kunz, Jan (advisor)
This master's thesis focuses on the implementation of methods for time synchronization of microcontrollers and their testing. The theoretical part introduces relative and absolute methods of time synchronization. Subsequently, the testing method for time synchronization is presented, using delay measurements and Allan deviation. In the thesis, a total of 4 methods of time synchronization are implemented: GPS, DCF77, RDS, and a method utilizing a superior system. Among these methods, synchronization from the superior system proved to be the most effective, achieving synchronization of the beginning of a second within tens of nanoseconds. The best wireless method has proven to be the GPS method, with its accuracy at the beginning of seconds being in the hundreds of nanoseconds.
|
|
| |
|
|
Alarm device
Demjanics, Ferenc ; Drexler, Petr (referee) ; Szabó, Zoltán (advisor)
Timer is an equipment that allows us to provide time measure. There are in all-day use a plenty of timers, but their use is ussually limited for one purpose only. Because of this I decided to compile a timer which allows to apply it for an individual needs. This granted a wider spectre of use in real life. We used a microcontroller from Atmel, and also a DCF77 signal (atomic time signal)receiver and decoder. Further, we required a real-time circuit, DC/DC converter, and a powerswitch from manufacturers STmicroelectronics, and Linear Technology,respectively.For the imaging unit we used a graphic LCD connected via an I2C bus, which is commercially available spare part for mobile phones. Following the design we compiled and revived a hardware part of the device. After a succesfull revive, we gradually compiled a program for microcontroller. The program defines a processes for run of the device. It was written in programming language C, with use of compiling enviroment avr studio 4
|
|
|
Digital clock with surface mounted matrix display
Filka, Tomáš ; Adámek, Martin (referee) ; Šandera, Josef (advisor)
This bachelor´s thesis deals with a draft of digital clock controlled by DCF77 signal transmitted from deutschland Mainflingen, designed as table clock. Matrix LED display, size 8x32, in form of a module that is soldered to a basic plate, and is used for displaying. Possible technical solutions for driving dot LED matrix, mounting technology and other parts are described and the outcome is a designed schema with printed circuit board.
|
|
|
Nixie Clock Contolled By The Dcf77 Signal
Piroch, Tomáš
The thesis is focused on realization of nixie clocks controlled by radio signal DCF77. The thesis contains the theoretical part, where theory of the DCF77 signal is described and practical part with description of design and following nixie clock connection, and clock chassis.
|
|
|
Digital clock with surface mounted matrix display
Filka, Tomáš ; Adámek, Martin (referee) ; Šandera, Josef (advisor)
This bachelor´s thesis deals with a draft of digital clock controlled by DCF77 signal transmitted from deutschland Mainflingen, designed as table clock. Matrix LED display, size 8x32, in form of a module that is soldered to a basic plate, and is used for displaying. Possible technical solutions for driving dot LED matrix, mounting technology and other parts are described and the outcome is a designed schema with printed circuit board.
|
|
|
Digital clock with surface mounted matrix display
Filka, Tomáš ; Adámek, Martin (referee) ; Šandera, Josef (advisor)
This bachelor´s thesis deals with a draft of digital clock controlled by DCF77 signal transmitted from deutschland Mainflingen, designed as table clock. Matrix LED display, size 8x32, in form of a module that is soldered to a basic plate, and is used for displaying. Possible technical solutions for driving dot LED matrix, mounting technology and other parts are described and the outcome is a designed schema with printed circuit board.
|
|
| |
|
|
Alarm device
Demjanics, Ferenc ; Drexler, Petr (referee) ; Szabó, Zoltán (advisor)
Timer is an equipment that allows us to provide time measure. There are in all-day use a plenty of timers, but their use is ussually limited for one purpose only. Because of this I decided to compile a timer which allows to apply it for an individual needs. This granted a wider spectre of use in real life. We used a microcontroller from Atmel, and also a DCF77 signal (atomic time signal)receiver and decoder. Further, we required a real-time circuit, DC/DC converter, and a powerswitch from manufacturers STmicroelectronics, and Linear Technology,respectively.For the imaging unit we used a graphic LCD connected via an I2C bus, which is commercially available spare part for mobile phones. Following the design we compiled and revived a hardware part of the device. After a succesfull revive, we gradually compiled a program for microcontroller. The program defines a processes for run of the device. It was written in programming language C, with use of compiling enviroment avr studio 4
|
guest ::
