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Power monitoring of IoT devices
Verčimák, Mário ; Jirgl, Miroslav (referee) ; Bradáč, Zdeněk (advisor)
This thesis describes energy consumption and power supplying low-power IoT devices. There is general analysis of current consumption and selecting suitable primary battery cell depends of behavior battery type. The next point is analysis of low-power and high-effectivity DC/DC convertor’s feature. The second part contains available solutions for energy monitoring and current measurement. This thesis also contains design of device for measure these energy consumption, with user application, which interprets measured data.
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Smart Wearable
Moravec, Luboš ; Macháň, Ladislav (referee) ; Šteffan, Pavel (advisor)
This master’s thesis deals with the explanation of the concept of smart wearables and the different application possibilities. This work also includes examples of finished demonstration devices in this category. Part of this work is devoted to guide the selection of appropriate components for the design of new equipment in the category of smart wearable. The result of this thesis is designed wearable and charging station. This device is able to read user input and display that information on a smart device running under Android system connected via Bluetooth technology.
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Converter with very low input voltage
Jaško, Michal ; Beneš, Petr (referee) ; Havránek, Zdeněk (advisor)
This Bachelor’s thesis describes a design and testing of an increasing direct voltage converter transforming light energy received by a photodiode to electrical energy with sufficient output voltage to power digital circuits. The theoretical part forms an overview of commercial circuits and the Linear Technology LTC3109 and the combination of Seiko S-822Z20 and S-8353D30MC are chosen as suitable for the further research. The function principles of these circuits are described. In the practical part the maximum output power and efficiency dependences on the internal resistance of the power source of the circuits are measured. Based on the results the characteristics of the Linear Technology circuit with different variants of the input transformers are compared. A modified Seiko circuit with an input photodiode is designed and its function is verified by laser diode powering through an optical fiber.
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The monitoring system for smart concrete construction condition
Brouček, Jan ; Šteffan, Pavel (referee) ; Macháň, Ladislav (advisor)
This thesis describes designing of a wireless system which allows to transmit measured data of sensors made of smart concrete. Measured data are transmitted from measuring points to the collecting unit, which stores them, and pass them to the server which is connected in the Internet network. The design of the system is focused to achieve low power consumption of all used components to provide the longest possible operation time, when using primary lithium cell. The design should be also able to provide possibility of easy modification of the measuring points.
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Low-power emulators of higher-order elements
Teska, Tomáš ; Brzobohatý, Jaromír (referee) ; Biolek, Dalibor (advisor)
The thesis deals with emulating higher-order elements using the transformation mutators, which were described by Leon Chua in 1971. The procedure of designing mutators from their mathematical description to the synthesis of concrete electrical circuits is described. The circuit solutions are based on the utilization of advanced circuit principles in order to achieve optimal circuit performance. Mutators are implemented as a set of eight incremental modules. Via their cascade connection, it is possible to emulate arbitrary elements from the periodical table of higher-order elements. The proposed solutions are tested by means of computer simulations and also verified by measurements.
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Design of low-voltage operational amplifier
Sysel, Jan ; Šteffan, Pavel (referee) ; Khateb, Fabian (advisor)
This work deals with the design of operational amplifier with extremely low supply voltage and low power consumption. In the theoretical part is presented theory dealing with the structure and design of operational amplifier. In the following part are desribed design methods suitable for realization of low-voltage circuits. In the next part were designed two operational amplifiers using low-voltage design methods. Properties of these operational amplifiers were then tested by simulations.
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Picoballoon Probe
Kaderka, Jakub
The Brno Observatory and Planetarium organised an international competition of PicoBalloon probes in March 2020. This article describes a technologies used in designing such probe. The probe is powered by a lithium battery which limits runtime to several days, but in comparison with the solar powered solutions it allows data transmission during the night. The probe is equipped with a pressure sensor and a GPS receiver. The telemetry is sent over an Internet of Things network. The probe was launched on 2nd of March and travelled over 1800 km in temperatures reaching -40 degrees Celsius.
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Design of low-voltage operational amplifier
Sysel, Jan ; Šteffan, Pavel (referee) ; Khateb, Fabian (advisor)
This work deals with the design of operational amplifier with extremely low supply voltage and low power consumption. In the theoretical part is presented theory dealing with the structure and design of operational amplifier. In the following part are desribed design methods suitable for realization of low-voltage circuits. In the next part were designed two operational amplifiers using low-voltage design methods. Properties of these operational amplifiers were then tested by simulations.
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Development localization board
Szabó, Michal ; Novotný, Radovan (referee) ; Levek, Vladimír (advisor)
This document describes a device capable to determine geographical position thanks to its GNSS module and measure the change of movement with the help of an accelerometer and gyroscope. Outputs of these integrated circuits are combined, data are processed and fused thanks to a numerical integration and mathematical filters. Results are stored on a memory card. The whole development is described from a concept, through the making of the device and software algorithms to the testing of its functions.
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