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The author Stephan Menzel provides an introduction into capacitor technology and describes the wide range of capacitor types with their properties and parameters. Basic principles This chapter imparts basic knowledge on the relationships between the electric field, permittivity, as well as the structure and operating principles of a capacitor. Capacitor characteristics The electrical parameters and essential characteristics of a capacitor are explained in greater detail for the reader. This extends from the actual capacitance of a capacitor through to the interdependencies. Capacitor types Existing capacitor types and their characteristics are presented. Film, electrolyte and ceramic capacitors are considered in detail.

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Fonctionnalité, structure et manipulation d'un module de puissance Pour les lecteurs débutant dans la gestion de l'énergie, l'« Abc des modules de puissance » contient les principes de base nécessaires à la sélection et à l'utilisation d'un module de puissance. Le livre décrit les relations et paramètres techniques liés aux modules de puissance et la base des techniques de calcul et de mesure. Contenu Les bases Ce chapitre décrit la nécessité d'un convertisseur de tension DC/DC et ses fonctionnalités de base. De plus, diverses possibilités de réalisation d'un régulateur de tension sont présentées et les avantages essentiels d'un module de puissance sont mentionnés. Topologies de circuits Les concepts de circuits, les topologies Buck et Boost très fréquemment utilisées avec les modules de puissance sont expliqués en détail et d'autres topologies de circuits sont introduites. Technologie, technologie de construction et de régulation La construction mécanique d'un module de puissance est présentée, qui a une influence significative sur la CEM et les performances thermiques. De plus, les méthodes de contrôle sont expliquées et des conseils de conception de circuit sont fournis dans ce chapitre. Méthodes de mesure Des résultats de mesure significatifs sont absolument nécessaires pour évaluer un module de puissance. Les points de mesure et méthodes de mesure pertinents sont décrits dans ce chapitre. Manutention Les aspects de stockage et de manipulation des modules de puissance sont expliqués, ainsi que leurs procédés de fabrication et de soudure. Sélection d'un module de puissance Les paramètres et critères importants pour la sélection optimale d'un module de puissance sont présentés dans cette section.

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Over 45 Builds for the Legendary 555 Chip (and the 556, 558) The 555 timer IC, originally introduced by the Signetics Corporation around 1971, is sure to rank high among the most popular analog integrated circuits ever produced. Originally called the IC Time Machine, this chip has been used in many timer-related projects by countless people over decades. This book is all about designing projects based on the 555 timer IC. Over 45 fully tested and documented projects are presented. All projects have been fully tested by the author by constructing them individually on a breadboard. You are not expected to have any programming experiences for constructing or using the projects given in the book. However, it’s definitely useful to have some knowledge of basic electronics and the use of a breadboard for constructing and testing electronic circuits. Some of the projects in the book are: Alternately Flashing Two LEDs Changing LED Flashing Rate Touch Sensor On/Off Switch Switch On/Off Delay Light-Dependent Sound Dark/Light Switch Tone Burst Generator Long Duration Timer Chasing LEDs LED Roulette Game Traffic Lights Continuity Tester Electronic Lock Switch Contact Debouncing Toy Electronic Organ Multiple Sensor Alarm System Metronome Voltage Multipliers Electronic Dice 7-Segment Display Counter Motor Control 7-Segment Display Dice Electronic Siren Various Other Projects The projects given in the book can be modified or expanded by you for your very own applications. Electronic engineering students, people engaged in designing small electronic circuits, and electronic hobbyists should find the projects in the book instructive, fun, interesting, and useful.

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40+ Projects using Arduino, Raspberry Pi and ESP32 This book is about developing projects using the sensor-modules with Arduino Uno, Raspberry Pi and ESP32 microcontroller development systems. More than 40 different sensors types are used in various projects in the book. The book explains in simple terms and with tested and fully working example projects, how to use the sensors in your project. The projects provided in the book include the following: Changing LED brightness RGB LEDs Creating rainbow colours Magic wand Silent door alarm Dark sensor with relay Secret key Magic light cup Decoding commercial IR handsets Controlling TV channels with IT sensors Target shooting detector Shock time duration measurement Ultrasonic reverse parking Toggle lights by clapping hands Playing melody Measuring magnetic field strength Joystick musical instrument Line tracking Displaying temperature Temperature ON/OFF control Mobile phone-based Wi-Fi projects Mobile phone-based Bluetooth projects Sending data to the Cloud The projects have been organized with increasing levels of difficulty. Readers are encouraged to tackle the projects in the order given. A specially prepared sensor kit is available from Elektor. With the help of this hardware, it should be easy and fun to build the projects in this book.

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The Internet of Things (IoT) is a new concept in intelligent automation and intelligent monitoring using the Internet as the communications medium. The “Things” in IoT usually refer to devices that have unique identifiers and are connected to the Internet to exchange information with each other. Such devices usually have sensors and/or actuators that can be used to collect data about their environments and to monitor and control their environments. The collected data can be processed locally or it can be sent to centralized servers or to the cloud for remote storage and processing. For example, a small device at the size of a matchbox can be used to collect data about the temperature, relative humidity and the atmospheric pressure. This data can be sent and stored in the cloud. Anyone with a mobile device can then access and monitor this data at any time and from anywhere on Earth provided there is Internet connectivity. In addition, users can for example, adjust the central heating remotely using their mobile devices and accessing the cloud. This book is written for students, for practising engineers and for hobbyists who want to learn more about the building blocks of an IoT system and also learn how to setup an IoT system using these blocks. Chapter 1 is an introduction to the IoT systems. In Chapter 2, the basic concepts and possible IoT architectures are discussed. The important parts of any IoT system are the sensors and actuators and they are described briefly in Chapter 3. The devices in an IoT system usually communicate with each other and the important aspect of IoT communication is covered in Chapter 4. Chapter 5 proceeds with the features of some of the commonly used development kits. One of these, the Clicker 2 for PIC18FJ manufactured by mikroElektronika, can be used as a processor in IoT systems and its features are described in detail in Chapter 6. A popular microcontroller C language, mikroC Pro for PIC gets introduced in Chapter 7. Chapter 8 covers the use of a click board with the Clicker 2 for PIC18FJ development kit. Similarly, the use of a sensor click board is described as a project in Chapter 9, and an actuator board in Chapter 10. Chapters 11 and 12 cover Bluetooth and Wi-Fi technologies in microcontroller based systems, and the remaining chapters of the book demo the creation of a simple Wi-Fi based IoT system with cloud-based data storage. This book has been written with the assumption that the reader has taken a course on digital logic design and has been exposed to writing programs using at least one high-level programming language. Knowledge of the C programming language will be very useful. Also, familiarity with at least one member of the PIC series of microcontrollers (e.g. PIC16 or PIC18) will be an advantage. The knowledge of assembly language programming is not required because all the projects in the book are based on using the C language. If you are a total beginner in programming you can still access the e-book, but first you are advised to study introductory books on microcontrollers.

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Guide de conception pour la conception de filtres EMI, les circuits SMPS et RF Le livre se concentre sur la sélection de composants, de circuits et de recommandations de configuration pour un large éventail de composants magnétiques, en gardant toujours à l'esprit un point de vue CEM. Contenu Principes de base Les lois et fondements les plus importants des composants inductifs, les schémas de circuits équivalents et les modèles de simulation donnent au lecteur une connaissance de base en électronique. Composants Ce chapitre présente les composants inductifs, leurs propriétés particulières et leurs domaines d'utilisation. Tous les composants pertinents sont expliqués, des composants CEM et inductances aux transformateurs, composants RF, composants de protection de circuit, matériaux de blindage et condensateurs. Applications Dans ce chapitre, le lecteur trouvera un aperçu complet du principe des circuits de filtrage, des circuits et de nombreuses applications industrielles qui sont expliqués en détail à partir d'exemples originaux.

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Contenu Principes de base Un connecteur est un système électromécanique qui assure une connexion séparable entre deux sous-systèmes d'un appareil électronique sans effet inacceptable sur les performances de l'appareil. Il sera démontré qu’il existe de nombreux paramètres complexes à gérer correctement pour que cette affirmation soit vraie. Conception / Sélection / Assemblage Ce chapitre donne un aperçu des exigences de conception et de matériaux pour les finitions de contact, les ressorts de contact et les boîtiers de connecteur ainsi que les principaux mécanismes de dégradation de ces composants de connecteur. Pour compléter ce chapitre, les critères de sélection des matériaux pour chacun seront également revus. De plus, le niveau d'interconnexion (LOI) a été intégré dans ce chapitre car il aborde l'endroit où le connecteur est utilisé dans un système électronique et influence donc les exigences et la durabilité du connecteur en fonction de son utilisation. Applications Ce chapitre s'oriente vers les travaux pratiques et montre comment les clients utilisent les connecteurs dans leurs applications pour offrir quelques possibilités et faciliter votre travail quotidien. De plus, il contient des sujets spéciaux tels que les moustaches en étain ou l'impédance du câble ZIF pour vous offrir des connaissances de base étendues.

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40+ Projects using Arduino, Raspberry Pi and ESP32 This book is about developing projects using the sensor-modules with Arduino Uno, Raspberry Pi and ESP32 microcontroller development systems. More than 40 different sensors types are used in various projects in the book. The book explains in simple terms and with tested and fully working example projects, how to use the sensors in your project. The projects provided in the book include the following: Changing LED brightness RGB LEDs Creating rainbow colours Magic wand Silent door alarm Dark sensor with relay Secret key Magic light cup Decoding commercial IR handsets Controlling TV channels with IT sensors Target shooting detector Shock time duration measurement Ultrasonic reverse parking Toggle lights by clapping hands Playing melody Measuring magnetic field strength Joystick musical instrument Line tracking Displaying temperature Temperature ON/OFF control Mobile phone-based Wi-Fi projects Mobile phone-based Bluetooth projects Sending data to the Cloud The projects have been organized with increasing levels of difficulty. Readers are encouraged to tackle the projects in the order given. A specially prepared sensor kit is available from Elektor. With the help of this hardware, it should be easy and fun to build the projects in this book.

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Over 45 Builds for the Legendary 555 Chip (and the 556, 558) The 555 timer IC, originally introduced by the Signetics Corporation around 1971, is sure to rank high among the most popular analog integrated circuits ever produced. Originally called the IC Time Machine, this chip has been used in many timer-related projects by countless people over decades. This book is all about designing projects based on the 555 timer IC. Over 45 fully tested and documented projects are presented. All projects have been fully tested by the author by constructing them individually on a breadboard. You are not expected to have any programming experiences for constructing or using the projects given in the book. However, it’s definitely useful to have some knowledge of basic electronics and the use of a breadboard for constructing and testing electronic circuits. Some of the projects in the book are: Alternately Flashing Two LEDs Changing LED Flashing Rate Touch Sensor On/Off Switch Switch On/Off Delay Light-Dependent Sound Dark/Light Switch Tone Burst Generator Long Duration Timer Chasing LEDs LED Roulette Game Traffic Lights Continuity Tester Electronic Lock Switch Contact Debouncing Toy Electronic Organ Multiple Sensor Alarm System Metronome Voltage Multipliers Electronic Dice 7-Segment Display Counter Motor Control 7-Segment Display Dice Electronic Siren Various Other Projects The projects given in the book can be modified or expanded by you for your very own applications. Electronic engineering students, people engaged in designing small electronic circuits, and electronic hobbyists should find the projects in the book instructive, fun, interesting, and useful.

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The State of Hollow State Audio in the Second Decade of the 21st Century Vacuum-tube (or valve, depending upon which side of the pond you live on) technology spawned the Age of Electronics early in the 20th Century. Until the advent of solid-state electronics near mid-century, hollow-state devices were the only choice. But following the invention of the transistor (after their process fell to reasonable levels), within a couple of decades, the death of vacuum tubes was widely heralded. Yet here we are some five decades later, and hollow-state equipment is enjoying something of a comeback, especially in the music and high-end audio industries. Many issues surround hollow-state audio: Does it produce—as some claim—better sound? If so, is there science to back up these claims? How do hollow-state circuits work? How do you design hollow-state audio circuits? If hollow-state equipment fails, how do you go about troubleshooting and repairing it? Can we recreate some of the classic hollow-state audio devices for modern listening rooms and recording studios? How can we intelligently modify hollow-state amplifiers to our taste? These and other topics are covered in The State of Hollow State Audio.

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Affichage de texte déroulant avec huit écrans matriciels LED 8 x 8 (512 LED au total). Construit autour d'un module Wi-Fi ESP-12F (basé sur ESP8266), programmé dans l'IDE Arduino. Le serveur Web ESP8266 permet de contrôler le texte affiché, le délai de défilement et la luminosité avec un téléphone mobile ou un autre appareil (portable) connecté au Wi-Fi. Caractéristiques Interface série 10 MHz Contrôle individuel des segments LED Sélection des chiffres avec décodage/sans décodage Arrêt à faible consommation de 150 µA (données conservées) Contrôle de la luminosité numérique et analogique Affichage masqué à la mise sous tension Affichage LED à cathode commune du lecteur Pilotes de segment limités à taux de rotation pour des EMI inférieurs (MAX7221) Interface série SPI, QSPI, MICROFIL (MAX7221) Boîtiers DIP et SO à 24 broches Remarque : Le circuit imprimé nu pour l'affichage des messages défilants (160491-1) est vendu séparément.

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Feutre universel pour la plupart des surfaces Convient pour la rétroprojection Convient également pour utilisation sur CD et DVD Excellente résistance à l'eau et aux frottements sur la plupart des surfaces Séchage rapide sur le support, idéal pour les gauchers Encre permanente et quasi inodore Encre noire et marron résistante aux U.V. Encre noire résistante aux intempéries Etui chevalet STAEDTLER box Corps et capuchon en polypropylène garantissant une longue durée de vie Encre "DRY SAFE" permettant de laisser décapuchonné plusieurs jours sans sécher (Test ISO 554) Sécurité avion : équilibrage automatique de la pression empêchant l'encre de fuir Encre sans xylène ni toluène Couleurs intenses Pointe superfine 0.4 mm Rechargeable

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