This thesis presents teaching fundamentals of digital logic design and VLSI design for freshmen and even for high school students using e-textiles. This easily grabs attention of students as it is creative and interesting. Using e-textiles to project these concepts would be easily understood by students at young age. This involves stitching electronic circuits on a fabric using basic components like LEDs, push buttons and so on. The functioning of these circuits is programmed in Lilypad Arduino. By using this method, students get exposed to basic electronic concepts at early stage which eventually develops interest towards engineering field.

Orientador: Michel Daoud Yacoub / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação / Made available in DSpace on 2018-08-27T01:29:54Z (GMT). No. of bitstreams: 1 Barbin_ManoelVitorio_M.pdf: 5394528 bytes, checksum: f2e1dbef898be5580589baf0e2996f16 (MD5) Previous issue date: 2015 / Resumo: A identificação de objetos através de ondas de radiofrequência ou RFID (Radio Frequency Identification) é uma tecnologia onde uma etiqueta, colocada em um objeto, tem suas informações lidas por um sistema de processamento remoto. Embora esta não seja uma tecnologia recente, sua utilização tem apresentado constante crescimento nos últimos anos. Atualmente, RFID é apontada com uma das principais tecnologias habilitadoras da internet do futuro, a Internet das Coisas, IoT (Internet of Things). Operando principalmente em faixas destinadas para o uso de aplicações médicas, científicas e industriais, ISM (Industrial, Scientific and Medical), sistemas de RFID apresentam diferentes características em função da banda de frequências utilizada. Em UHF (Ultra High Frequency), os sistemas de RFID que fazem uso de etiquetas passivas, são considerados como uma solução com bom desempenho para a identificação de objetos em distâncias que variam de alguns poucos centímetros a vários metros. Contudo, a distância de identificação depende do material que constitui um dado objeto. Por exemplo, metais estão entre os materiais que degradam significativamente o desempenho de sistemas de RFID em UHF, reduzindo a distância de identificação. Diversas soluções de etiquetas têm sido desenvolvidas com o objetivo de torná-las, o máximo possível, insensíveis à presença do metal. Alguns diferentes tipos de antenas foram propostas, entre as quais se destacam as que possuem um plano-terra inerente a sua estrutura, como a de microfita e a planar de F-Invertido, PIFA (Planar Inverted-F Antenna). Uma revisão destas soluções é realizada nesta dissertação. Este trabalho descreve o projeto de uma etiqueta passiva de RFID em UHF, baseado em uma PIFA, para identificação de objetos metálicos colocados em distâncias maiores que oito metros, aproximadamente. O principal objetivo de uso da etiqueta é na identificação de objetos com razoáveis dimensões tais como containers, chapas, canos, etc., frequentemente encontrados em ambientes industriais e armazéns de estocagem. Uma forma diferente de alimentação do sinal de radiofrequência para a antena é desenvolvida. Simulações eletromagnéticas e medições indicam um bom desempenho da etiqueta em uma ampla faixa de frequências, que abrange as principais bandas de operação de RFID em UHF no mundo / Abstract: The identification of objects by radio waves or RFID (Radio Frequency Identification) is a technology where a tag is attached to an object and its information read by a remote processing system. Although it is not a new technology, its use has shown steady growth in recent years. Currently, RFID is identified as one of the main enabling technologies of the future Internet, the Internet of Things, IoT. Operating in the bands intended primarily for use in industrial, scientific and medical (ISM) applications, RFID systems have different characteristics depending on the frequency band used. In the UHF (Ultra High Frequency) band, RFID systems using passive tag are considered as a solution with good performance to identify objects at distances ranging from a few centimeters to several meters. However, the distance of identification depends on the material that the object is made of. For example, metals are materials which can significantly degrade the performance of UHF RFID systems by reducing the distance of identification. Several solutions for tags have been developed in order to make them, as far as possible, insensitive to the presence of metal. Some different types of antennas were proposed, among which are those with a ground plane inherent in its structure, such as the microstrip antenna and the PIFA (Planar Inverted-F Antenna). A review of these solutions is carried out in this dissertation. This document describes the design of a passive RFID tag in UHF, based on a PIFA for identification of metallic objects placed at distances greater than eight meters or so. The main use of the tag is to identify objects with medium or large dimensions such as containers, plates, pipes, etc., often found in industrial environments and storage warehouses. A different kind of RF feeder to the antenna is developed. Electromagnetic simulations and measurements indicate a good tag performance in a wide frequency band, which covers the main RFID UHF operation bands in the world / Mestrado / Telecomunicações e Telemática / Mestre em Engenharia Elétrica

Electronics miniaturization is an ever-important subject in the industry of consumer electronics, where smaller, lighter and more powerful electronics is expected. This thesis investigates the miniaturization challenge in the EU-funded project SOMIRO, that aims to construct an energy autonomous swimming millirobot for remote sensing in in agriculture. The current prototype Generation 1 (G1) prototype design is used as a base and a smaller version with additional features is constructed to evaluate possible performance differences. The Printed Circuit Board (PCB) that is produced is of a folding flex-rigid construction that sandwiches several layers of components to fit all components required. The performance of the new Generation 2 (G2) prototype is very similar to the existing G1 prototype in all electrical performance tests with the notable exception being the current draw for actuation of the swimming platform. The G2 prototype consumes significantly less current in this case, which is beneficial for the limited energy availability the millirobot will be operating in. There is still room for improving the PCB design with additional advanced PCB manufacturing techniques. Some of the external parts for the final version of the millirobot still needs to be finalized, for which this PCB may need additional changes, but this is not part of this thesis. / Miniatyrisering av elektronik är ett ständigt aktuellt problem i industrin för konsumentelektronik, där mindre, lättare och mer kraftfulla produkter förväntas. Detta mastersarbete undersöker miniatyriseringsutmaningen i EU-projektet SOMIRO som ska utveckla en energiautonom simmande millirobot för distribuerad mätning inom vattenbaserade jordbruk. Den nuvarande prototypen, Generation 1 (G1), lägger grunden till detta arbete som producerar en mindre version som dessutom innehåller fler funktioner. Den nya prototypen, Generation 2 (G2), utvärderas och jämförs med G1-versionen för att se om det är någon skillnad i elektrisk prestanda. Kretskortet som konstrueras är hopvikbart för att få plats med alla komponenter. Det nya kortet presterar mycket likt G1-versionen, förutom i testet för drivningen av aktuatorplattformen, där det nya kortet drog mindre ström. Det är en fördel då en mycket begränsad mängd energi kommer finnas tillgänglig i de tänkta miljöerna för milliroboten. Det finns fortfarande förbättringsmöjligheter då ytterligare avancerade konstruktionstekniker kan användas i design och tillverkning av kretskortet för att minska storleken ytterligare. Vissa förändringar kan också krävas för att kretskortet ska kunna monteras ihop med de externa delarna som ingår i den kompletta milliroboten, vilket dock inte är del av detta arbete.

A comprehensive and scalable solution for high-performance switched capacitor amplification is presented. Central to this discussion is the concept of ring amplification. A ring amplifier is a small modular amplifier derived from a ring oscillator that naturally embodies all the essential elements of scalability. It can amplify with accurate rail-to-rail output swing, drive large capacitive loads with extreme efficiency using slew-based charging, naturally scale in performance according to process trends, and is simple enough to be quickly constructed from only a handful of inverters, capacitors, and switches. In addition, the gain-enhancement technique of Split-CLS is introduced, and used to extend the efficacy of ring amplifiers in specific and other amplifiers in general. Four different pipelined ADC designs are presented which explore the practical implementation options and design considerations relevant to ring amplification and Split-CLS, and are used to establish ring amplification as a new paradigm for scalable amplification. / Graduation date: 2012 / Access restricted to the OSU Community, at author's request, from July 19, 2012 - July 19, 2013

Cílem této práce je vývoj dvoukanálového kontroléru krokových motorů. V rámci práce je popsán jak vývoj elektroniky, tak vývoj příslušného software. Elektronika kontrolŕu je založena na mikrokontroléru STM32F405 a driverů krokových motorů vyráběných firmou Trinamic. Pro komunikaci s nadřazenými systémy je implementován protokol CANOpen a sběrnice I\textsuperscript{2}C a USB. Elektronika byla navržena v software KiCAD and využívá čtyřvrstvého plošného spoje a moderních výrobních technologií. Co se týká software, byl vyvinut jak firmware pro mikrokontrolér, tak software pro ovládání kontroléru. Obě části software využívají programovacího jazyka Rust, který se zaměřuje na bezpečnost práce s pamětí, rychlost a zero-cost abstrakce. Sekundárním cílem této práce je ukázat, jak lze tento programovací jazyk s výhodou použít pro programování nízkoúrovňového embedded software. Firmware kontroléru implementuje nezávislé řízení pohybu obou os kontroléru a to jak v rychlostním, tak v pozičním režimu a zároveň implementuje bezpečnostní funkce pro případy selhání komunikace. Výsledný kontrolér by měl být použit v rámcí výzkumné skupiny Robotiky a Umělé Inteligence a studenty na Ústavu Automatizace FEKT VUT.