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Timer For RC Models
Fišer, Ondřej ; Pospíšil, Martin (referee) ; Šebesta, Jiří (advisor)
This paper describes complete design of timer for RC models. Described timer has three PWM outputs. With these outputs it is possible to connect two independent servo-motors and engine controller. 1 signal. The whole is controlled by 8-bit microprocessor. The time records are stored in external EEPROM, that can be programmed using I2C. Paper further discuss design of programming, which can be easily programmed the memory of EEPROM by the PC or smartphone. The goal of this paper is to design and build high quality RC timer with accessories.
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Class D audio amplifier with PWM modulation
Arvai, Luboš ; Petržela, Jiří (referee) ; Kratochvíl, Tomáš (advisor)
The aim of this project is design audio amplifier working in class D with power output 2x20 W. In the beginning is shortly described a principle of amplifiers in class D. In the next chapter is block circuit diagram and requirements list for individual blocks. In next section is closely described circuit design of correction preamplifier, PWM modulator with driver of power transistors, power stage and output filter. At the conclusion is summarized experimentally obtained knowledge. On the basis of this knowledge is described modification of original design.
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Controler for brushless motors
Zdařil, Tomáš ; Bradáč, Zdeněk (referee) ; Kincl, Zdeněk (advisor)
The goal of the thesis was to design and create one-way speed controler for brushless DC motors, that is used in air modeling. The circuit is controlled by the Atmel AVR. As power unit for motor is used Li–pol accumulator. The controller is equipped with BEC to power the receiver and allows monitoring of current consumption and voltage on the accumulator. Measured data can be upload to a PC where they can be displayed by RegulatorPC in graphical form.
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Timer For Rc Models
Fišer, Ondřej
This paper describes complete design of timer for RC models. Described timer has three PWM outputs. With these outputs it is possible to connect two independent servo-motors and engine controller. The whole is controlled by 8-bit microprocessor. The time records are stored in external EEPROM, that can be programmed by using I2C bus. Paper further discus design of programming, which can be easily programmed the memory of EEPROM by the PC or smartphone. The goal of this paper is to design and build high quality RC timer with accessories.
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Timer For RC Models
Fišer, Ondřej ; Pospíšil, Martin (referee) ; Šebesta, Jiří (advisor)
This paper describes complete design of timer for RC models. Described timer has three PWM outputs. With these outputs it is possible to connect two independent servo-motors and engine controller. 1 signal. The whole is controlled by 8-bit microprocessor. The time records are stored in external EEPROM, that can be programmed using I2C. Paper further discuss design of programming, which can be easily programmed the memory of EEPROM by the PC or smartphone. The goal of this paper is to design and build high quality RC timer with accessories.
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Controler for brushless motors
Zdařil, Tomáš ; Bradáč, Zdeněk (referee) ; Kincl, Zdeněk (advisor)
The goal of the thesis was to design and create one-way speed controler for brushless DC motors, that is used in air modeling. The function is based on the without sensors control method and circuit is controlled by the Atmel AVR. Power unit for motor is used Li – pol accumulator. The controller is equipped with a BEC to power the receiver and allows monitoring current and voltage on the accumulator. The measured data can be uploaded to a PC.
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Ultrasonic Directional Speaker
Sedlák, Jiří ; Michalec, Jaroslav (referee) ; Mikulka, Jan (advisor)
The master´s thesis deals with theoretical research and practical application of the principle of spreading acoustic waves through nonlinear medium. The theoretical part describes five different types of amplitude modulation and their mathematic representation, which were verified by the program Matlab. Next, the impedance characteristic of ultrasound PZT transducer was measured and the design of PWM modulator and class D amplifier was described. The practical part of the master´s thesis contains the realization of the parametric loudspeaker assembled from the class D amplifier and the PWM modulator. In conclusion, the designed parametric loudspeaker was measured and the individual types of amplitude modulation were compared with respect to the total harmonic distortion of transmitted useful signal.
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Multipurpose power supply for electroplating system
Pinďák, Michal ; Vorel, Pavel (referee) ; Procházka, Petr (advisor)
The aim of the bachelor thesis is the practical proposal of the multipurpose power supply for the electroplating system. The individual technological processes of electroplating, for which the parameters of the source have to be adapted, are presented in the theoretical part. This part includes the entire division of pulse DC/DC converters without a transformer from the aspect of working quadrants and finally the ways of their controlling. There is also introduced the analysis of parameters of the presumed DC power supply XP Power HDS3000PS60. The conclusion of the thesis is focused on the entire proposal of converter wiring, its construction and subsequent commissioning through the software LabVIEW.
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Design and realization stereophonic amplifier class D
Hradil, Jaroslav ; Háze, Jiří (referee) ; Pavlík, Michal (advisor)
The aim of this project is to design a class D stereo audio amplifier with output power of 2 x 50 W into 4 load with THD+N less than 10%. Project is divided into three parts. First part describes the principles of class D amplifiers, the second part contains actual design of amplifier and the last part presents the results of the measurements.
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