National Repository of Grey Literature 95 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
Universal passive frequency crossover - laboratory device
Pacek, Dominik ; Hanák, Pavel (referee) ; Balík, Miroslav (advisor)
The aim of this work is to theoretically outline the issues associated with design of a passive crossover network in the context of speaker system design and the solutions to the mentioned issues.The practical part of the work deals with the design of a laboratory passive crossover network, it’s construction and creation of laboratory task utilizing the crossover network for teaching loudspeakers and speaker systems course.
Digital volume control pod with graphic display
Schilhab, Karel ; Balík, Miroslav (referee) ; Hanák, Pavel (advisor)
The bachelor thesis deals with the design and construction of a digital volume control with graphical indication, Mute and Standby functions. The design includes a microcontroller, OLED display, D / A converter, incremental encoder and voltage stabilizer. Communication in the device takes place via the I2C line. Stopping the volume is realized by changing the voltage in the range from 0 to 1 V. The aim of the work is to design and manufacture the circuit, write the source code and build the device into the box.
Temperature regulator with ESP8266
Vymazal, Tomáš ; Hanák, Pavel (referee) ; Lattenberg, Ivo (advisor)
The bachelor thesis mainly focuses on a development of a smart socket thermostat able to communicate with a user and other applications via Wi-Fi interface in the 2.4 GHz band. Subsequent centers of attention are electrical temperature measurement and analysis of IoT clouds, currently used for logging and visualization of gauged data. Essential part of the work is the detailed depiction of PCBs development from their design to the particular stages of progress. The last but not least are the firmware measures and the regulation functionality verification.
Distance meter with ESP32
Havelka, Jan ; Hanák, Pavel (referee) ; Lattenberg, Ivo (advisor)
The aim of this thesis was to implement a distance meter with two sensors (ultrasonic and laser) with an ESP32 microcontroller. Then the ability to display measured values on the display and via the web interface. The first part deals with the theory of ultrasound and laser, their use as distance meters and a summary of advantages and disadvantages. The following chapter describes the design of the distance meter with all the components that will be used. The third chapter focuses on the implementation of the distance meter. It was created wiring diagram and designed printed circuit board that handled all mutual communication between the ESP32 and other peripherals. The whole device is placed in a box in the shape of a pistol printed on a 3D printer. The next part of the work briefly describes the software of the distance meter written in the C programming language in the development environment Arduino IDE. Finally, images of the final product were inserted into the work and test measurements were performed, the result of them is written into tables, graphs and subsequently evaluated.
Measurement of passive frequency crossovers for loudspeaker systems
Holínský, Jan ; Hanák, Pavel (referee) ; Balík, Miroslav (advisor)
The content of the master´s thesis is to approach the issue of measuring the characteristics of passive frequency crossover. The work describes individual types of measured characteristics and their possibility of measurement. Then the work describes design of modules for measurement characteristics of passive frequency crossover (shunt, resistive load and amplifier). These modules were made and tested for its functions. For the amplifier is then made a second design for fulfilment requirements. The second version isn’t made in this work. At the end of the work was prepared the theoretical part of the laboratory task: Measurement of characteristics of passive frequency crossover, including protocol.
Automatic table distillation column
Ružička, Michal ; Hanák, Pavel (referee) ; Dejdar, Petr (advisor)
The semester thesis deals with the issue of alcohol distillation and analysis for understanding at the level for construction of the facility itself. It deals with the requirements for the distillation equipment and parameters that may affect the quality of the distillate. On the basis of which is created automated control by microcontroller. This apparatus is exposed to tests and measurements of the required values during distillation. The cooling unit was also built and measured.
Modular Active Crossover Network - Laboratory Tool
Holínský, Jan ; Hanák, Pavel (referee) ; Balík, Miroslav (advisor)
This thesis is about design of active frequency crossovers and their implementation. The work analyses particular types of circuits used in active frequency crossovers, especially circuits used for laboratory device. Then the work describes design of printed circuit boards (PCB) for the designed circuits and construction of modules for the laboratory device, when the compatibility and modularity is important for all active frequency crossovers arts. These modules are made and testing its functions. In this thesis is disassembled final proposal laboratory device and laboratory device is realized. The design and measurement of the characteristics of active frequency crossovers and correction circuits is processed in the form of a laboratory tasks.
Precision audio preamplifier for headset measurement
Šimek, Michal ; Balík, Miroslav (referee) ; Hanák, Pavel (advisor)
This thesis deals with microphone and headphone preamplifier for microtelephone and headset. The design shall meet the electrical interface requirements set out in ITU-T Rec. P.381(08/2012). The design includes a voltage converter, microtelephone bias and both a battery and an external power supply. In this work is also described the design of printed circuit board and the solution of a low noise in the whole circuit. The aim of this thesis is to design, built and embed the laboratory fixture into a metal box. Finally, measure the product on an APx525 audio precision analyzer.
Precision audio preamplifier for headset measurement
Šimek, Michal ; Balík, Miroslav (referee) ; Hanák, Pavel (advisor)
This thesis deals with microphone and headphone preamplifier for microtelephone and headset. The design shall meet the electrical interface requirements set out in ITU-T Rec. P.381(08/2012). The design includes a voltage converter, microtelephone bias and both a battery and an external power supply. In this work is also described the design of printed circuit board and the solution of a low noise in the whole circuit. The aim of this thesis is to design, built and embed the laboratory fixture into a metal box. Finally, measure the product on an APx525 audio precision analyzer.
Influence of Impedance of Input and Output Circuits and Connecting Cables on Audio Signal Transmission
Ďurka, Adam ; Hanák, Pavel (referee) ; Kubánek, David (advisor)
This bachelor thesis deals with the influence of parasitic properties of audio cables as well as input and output impedances of various audio devices for signal transmission between them and also its linear distortion. Using alternative wiring diagrams of these devices, simulations of transmission and linear distortion are performed, and then laboratory jigs for measuring these parameters are designed and implemented. In the next part of the work, the measurements of the transfer between the jigs are performed using the Bode 100 circuit analyzer and the resulting characteristics are compared with the simulated values.

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12 Hanák, Petr
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