Zoekresultaten voor "elektor OR magazine OR nl OR september OR oktober OR 2018 OR pdf"

Selbst für so manchen an der Elektronik Interessierten ist die Röhrentechnologie ein technischer Anachronismus, Röhrenverstärkern könne doch allenfalls noch ein Ehrenplatz im Museum zugewiesen werden. Das ist einerseits durchaus richtig, Röhren haben eine fast hundertjährige Geschichte hinter sich. Seit der Erfindung des Transistors, der Öffentlichkeit vorgestellt am 23.12.1947, war das Ende der Röhrenära eingeläutet. Von da ab sollte es immerhin noch mehr als zwanzig Jahre dauern, bis die Röhren – von Sonderanwendungen abgesehen – aus dem Blickfeld des durchschnittlichen Elektronikgeräte-Konsumenten weitgehend verschwunden waren. So gesehen, sind Röhren tatsächlich veraltet, haben Röhren Museumcharakter. Niemand käme wohl heute auch mehr ernsthaft auf die Idee, sein leistungsfähiges Digitalmessinstrument gegen ein Röhrenvoltmeter auszutauschen; hochintegrierte Halbleiterchips können nun einmal bei eigentlich unvergleichlich geringerem Platz- und Energiebedarf mehr. Auf die Überlegenheit moderner Mikroprozessoren in Bezug auf Rechengeschwindigkeit und Speicherkapazität braucht man eigentlich gar nicht zu verweisen. Der erste programmgesteuerte Elektronikrechner Eniac im Jahre 1945 wog rund 30 Tonnen, enthielt neben insgesamt etwa 500.000 übrigen Bauteilen 18.000 Elektronenröhren und füllte eine mittlere Halle. In einem Bereich allerdings, im Bereich der Audio-Signalverarbeitung, haben Röhren bei Kennern und Musikliebhabern ihre Bedeutung bewahrt oder zurückerlangt: Für eine mittlerweile gestiegene Zahl kritischer Hi-Fi-Hörer steht "ihr" Röhrenverstärker im Zentrum der heimischen Anlage und für unzählige Musiker ist der Gitarrenröhrenverstärker nach wie vor ein Garant für guten Sound. Dieses Book spricht jeden an, der sich für Röhren aus den verschiedensten Gründen interessiert, den "Audiophilen" ebenso wie den aktiven Musiker und natürlich auch den, der einfach nur etwas über die Geschichte und die gegenwärtige Anwendbarkeit von Röhren wissen will. Aus diesem Grund hat der Autor sowohl Informationen über ein interessantes Stück Technikgeschichte als auch – praxisorientiert – Schaltungen und Selbstbauanleitungen zusammengetragen.

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35 Projects for Beginners This book is for hobbyists, students and engineers who want to learn C and how to use an mbed ARM microcontroller in an easy and fun way, without the need for cumbersome software installations. ARM mbed microcontroller NXP LPC1768 The projects in this book are meant for beginners in C and ARM microcontrollers. That doesn't mean the projects are simple, but it does mean that they are easy to understand. We use for example USB communications, a subject that is made so easy by the mbed that it is suitable for a beginners book. Cloud technology The mbed NXP LPC1768 uses cloud technology, a revolutionary concept in software development. This means you do not need to install software on your PC in order to program the mbed! The only thing you need is a browser such as Microsoft Internet Explorer, and a USB port on your PC. You can get access to your project from any PC anywhere in the world and continue working on it. When you are done a few simple mouse clicks transfer the program to your mbed hardware. Of course you can optionally download the projects and store them on your own PC. Features of this Book Learn how to program an mbed ARM microcontroller using cloud technology. No complicated software installation on your PC needed. Learn programming in C by doing fun and interesting projects. No previous experience or knowledge required. Examples of projects in this book: flashing light, timer, light activated switch, digital thermometer, people detector, USB communication, talking microcontroller, debugging, sound switch, and much more - 35 projects in total. Examples of C subjects in this book: variables, commands, functions, program execution, pointers (introduction).

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The Raspberry Pi is a $35 credit-card sized computer with many applications, such as in desktop computing, audio and video playback, and as a controller in many industrial, commercial and domestic applications. This book is about the Raspberry Pi computer and its use in control applications. The book explains in simple terms, with examples, how to configure the RPi, how to install and use the Linux operating system, how to write programs using the Python programming language and how to develop hardware based projects. The book starts with an introduction to the Raspberry Pi computer and covers the topics of purchasing all the necessary equipment and installing/using the Linux operating system in command mode. Use of the user-friendly graphical desktop operating environment is explained using example applications. The RPi network interface is explained in simple steps and demonstrates how the computer can be accessed remotely from a desktop or a laptop computer. The remaining parts of the book cover the Python programming language, hardware development tools, hardware interface details, and RPi based hardware projects. All the 23 projects given in the book have been tested and are working. The following headings are given for each project: Project title Project description Project block diagram Project circuit diagram Project program description using the Program Description Language (PDL) Complete program listing Description of the program The book is ideal for self-study, and is intended for electronic/electrical engineering students, practising engineers, research students, and hobbyists.

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Third, extended and revised edition with AVR Playground and Elektor Uno R4 Arduino boards have become hugely successful. They are simple to use and inexpensive. This book will not only familiarize you with the world of Arduino but it will also teach you how to program microcontrollers in general. In this book theory is put into practice on an Arduino board using the Arduino programming environment. Some hardware is developed too: a multi-purpose shield to build some of the experiments from the first 10 chapters on; the AVR Playground, a real Arduino-based microcontroller development board for comfortable application development, and the Elektor Uno R4, an Arduino Uno R3 on steroids. The author, an Elektor Expert, provides the reader with the basic theoretical knowledge necessary to program any microcontroller: inputs and outputs (analog and digital), interrupts, communication busses (RS-232, SPI, I²C, 1-wire, SMBus, etc.), timers, and much more. The programs and sketches presented in the book show how to use various common electronic components: matrix keyboards, displays (LED, alphanumeric and graphic color LCD), motors, sensors (temperature, pressure, humidity, sound, light, and infrared), rotary encoders, piezo buzzers, pushbuttons, relays, etc. This book will be your first book about microcontrollers with a happy ending! This book is for you if you are a beginner in microcontrollers, an Arduino user (hobbyist, tinkerer, artist, etc.) wishing to deepen your knowledge,an Electronics Graduate under Undergraduate student or a teacher looking for ideas. Thanks to Arduino the implementation of the presented concepts is simple and fun. Some of the proposed projects are very original: Money Game Misophone (a musical fork) Car GPS Scrambler Weather Station DCF77 Decoder Illegal Time Transmitter Infrared Remote Manipulator Annoying Sound Generator Italian Horn Alarm Overheating Detector PID Controller Data Logger SVG File Oscilloscope 6-Channel Voltmeter All projects and code examples in this book have been tried and tested on an Arduino Uno board. They should also work with the Arduino Mega and every other compatible board that exposes the Arduino shield extension connectors. Please note For this book, the author has designed a versatile printed circuit board that can be stacked on an Arduino board. The assembly can be used not only to try out many of the projects presented in this book but also allows for new exercises that in turn provide the opportunity to discover new techniques. Also available is a kit of parts including the PCB and all components. With this kit you can build most of the circuits described in the book and more. Datasheets Active Components Used (.PDF file): ATmega328 (Arduino Uno) ATmega2560 (Arduino Mega 2560) BC547 (bipolar transistor, chapters 7, 8, 9) BD139 (bipolar power transistor, chapter 10) BS170 (N-MOS transistor, chapter 8) DCF77 (receiver module, chapter 9) DS18B20 (temperature sensor, chapter 10) DS18S20 (temperature sensor, chapter 10) HP03S (pressure sensor, chapter 8) IRF630 (N-MOS power transistor, chapter 7) IRF9630 (P-MOS power transistor, chapter 7) LMC6464 (quad op-amp, chapter 7) MLX90614 (infrared sensor, chapter 10) SHT11 (humidity sensor, chapter 8) TS922 (dual op-amp, chapter 9) TSOP34836 (infrared receiver, chapter 9) TSOP1736 (infrared receiver, chapter 9) MPX4115 (analogue pressure sensor, chapter 11) MCCOG21605B6W-SPTLYI (I²C LCD, chapter 12) SST25VF016B (SPI EEPROM, chapter 13) About the author Clemens Valens, born in the Netherlands, lives in France since 1997. Manager at Elektor Labs and Webmaster of ElektorLabs, in love with electronics, he develops microcontroller systems for fun, and sometimes for his employer too. Polyglot—he is fluent in C, C++, PASCAL, BASIC and several assembler dialects—Clemens spends most of his time on his computer while his wife, their two children and two cats try to attract his attention (only the cats succeed). Visit the author’s website: www.polyvalens.com.Authentic testimony of Hervé M., one of the first readers of the book:'I almost cried with joy when this book made me understand things in only three sentences that seemed previously completely impenetrable.'

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Newton a rendez-vous avec l’électronique 36 Expériences de Physique avec Arduino (E-Book) Pour la maison & l’école Points forts Un peu d'électronique et beaucoup d'experimentation : un livre ludique ! Gravité, réfraction, couleurs, vitesse du son, pendule, masse, élasticité, pression, aimants : une approche nouvelle et créative des leçons de physique Matériel peu coûteux et facilement disponible Logiciels gratuits Kit disponible séparément La rencontre de la physique et du microcontrôleur ne devrait plus étonner personne. Il existe d’excellents enregistreurs de données, ainsi que de nombreux programmes pour les traiter et les présenter sous forme de graphiques colorés et attrayants. La physique rébarbative, c’est fini ! J’ai choisi l’Arduino, car cette plate-forme est d’un accès facile et sa documentation abondante. La famille Arduino offre des ressources extraordinaires à un prix dérisoire. Ajoutez-y le logiciel gratuit CoolTerm, et vous pouvez enregistrer toutes les données de mesure pour les retravailler sous Excel et créer aisément des tableaux ou des graphiques. Ce livre n’est pas un manuel de physique. Vous n’y trouverez ni équations différentielles ni courbes abstraites. Nous étudierons des phénomènes physiques de la vie de tous les jours. Sans chercher à être exhaustif, mon modeste ouvrage apporte aux leçons de physique une approche nouvelle et créative grâce aux techniques modernes de mesure et de traitement des données. L’électronique utilisée est simple, et constitue une belle démonstration des possibilités. Kit de démarrage du livre « 36 expériences de physique avec Arduino » disponible séparément ! - http://www.youtube.com/watch?v=bG_IpyGBKNY- http://www.youtube.com/watch?v=ySBvh8XgyvA L'auteurL’auteur pratique l’électronique depuis de nombreuses années. Ses premiers articles publiés par le magazine Elektor dans ses premiers numéros datent de bien avant l’apparition des petits ordinateurs domestiques pour lesquels il se passionnera. Ses sujets de prédilection devinrent le ZX81 et le standard MSX. Aujourd’hui, il revient avec des idées très personnelles et des projets originaux, pour le plus grand bénéfice des lecteurs intéressés par l’électronique programmée.Revisiter les lois de la physique ? Avec Arduino, c’est instructif et amusant. Il fallait y penser… Gravité, réfraction, couleurs, vitesse du son, pendule, masse, élasticité, pression, aimants… deviennent de passionnants objets d’expérimentation avec Willem van Dreumel.

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Ready-to-use devices and self-built Arduino nodes in the 'The Things Network' LoRaWAN has developed excellently as a communication solution in the IoT. The Things Network (TTN) has contributed to this. The Things Network was upgraded to The Things Stack Community Edition (TTS (CE)). The TTN V2 clusters were closed towards the end of 2021. This book shows you the necessary steps to operate LoRaWAN nodes using TTS (CE) and maybe extend the network of gateways with an own gateway. Meanwhile, there are even LoRaWAN gateways suitable for mobile use with which you can connect to the TTN server via your cell phone. The author presents several commercial LoRaWAN nodes and new, low-cost and battery-powered hardware for building autonomous LoRaWAN nodes. Registering LoRaWAN nodes and gateways in the TTS (CE), providing the collected data via MQTT and visualization via Node-RED, Cayenne, Thingspeak, and Datacake enable complex IoT projects and completely new applications at very low cost. This book will enable you to provide and visualize data collected with battery-powered sensors (LoRaWAN nodes) wirelessly on the Internet. You will learn the basics for smart city and IoT applications that enable, for example, the measurement of air quality, water levels, snow depths, the determination of free parking spaces (smart parking), and the intelligent control of street lighting (smart lighting), among others.

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Programming and Projects for the Minima and WiFi Based on the low-cost 8-bit ATmega328P processor, the Arduino Uno R3 board is likely to score as the most popular Arduino family member, and this workhorse has been with us for many years. Eleven years later, the long-overdue successor, the Arduino Uno R4, was released. It is built around a 48 MHz, 32-bit Arm Cortex-M4 microcontroller and provides significantly expanded SRAM and Flash memory. Additionally, a higher-precision ADC and a new DAC are added to the design. The Uno R4 board also supports the CAN Bus with an interface. Two versions of the board are available: Uno R4 Minima, and Uno R4 WiFi. This book is about using these new boards to develop many different and interesting projects with just a handful of parts and external modules. All projects described in the book have been fully tested on the Uno R4 Minima or the Uno R4 WiFi board, as appropriate. The project topics include the reading, control, and driving of many components and modules in the kit as well as on the relevant Uno R4 board, including LEDs 7-segment displays (using timer interrupts) LCDs Sensors RFID Reader 4x4 Keypad Real-time clock (RTC) Joystick 8×8 LED matrix Motors DAC (Digital-to-analog converter) LED matrix WiFi connectivity Serial UART CAN bus Infrared controller and receiver Simulators … all in creative and educational ways with the project operation and associated software explained in great detail.

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Met ringkern-uitgangstranformatoren Buizenversterkers vormen voor velen het neusje van de zalm, wanneer het gaat om de versterking van audiosignalen. De combinatie van klassieke techniek met moderne componenten heeft geleid tot een ware revival van de buizenversterker. De toepassing van de in de afgelopen 15 jaar door de auteur ontwikkelde 'ringkern-uitgangstransformatoren' heeft daar mede toe bijgedragen. Opvallend aan deze transformatoren zijn vooral het extreem grote frequentie bereik en de geringe lineaire en niet-lineaire vervormingen. Het hoe en waarom van de transformator wordt op verschillende niveaus uitgelegd, beginnend bij inleidende begripsvorming en eindigende bij complete wiskundige beschrijvingen, waarbij ook de samenwerking van de transformator met de buizen en de luidspreker centraal staat. Naast de beschrijving van schematuur en zelfbouw van eenvoudig na te bouwen moderne high-end buizenversterkers met een uitgangsvermogen van 10 tot 100 Watt, worden bijzondere buizenversterkers met ringkerntransformatoren besproken: innovatieve oplossingen voor perfecte audiokwaliteit. Zowel de zelfbouwer als degene die kennis en inzicht wil verwerven in de complexe materie van transformatoren, buizenversterkers en audiosignaalverwerking zal dit boek met plezier ter hand nemen.

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Meer dan 40 volledig geteste ESP32-projecten met Arduino IDE en de LVGL grafische bibliotheek Deze bundel bevat de ESP32 Cheap Yellow Display (CYD) – een compact ontwikkelbord dat een standaard ESP32-microcontroller combineert met een TFT-kleurendisplay van 320 x 240 pixels. Het bord beschikt ook over meerdere aansluitingen voor GPIO, seriële communicatie (TX/RX), voeding en aarde. Het ingebouwde display is een groot voordeel, omdat gebruikers hiermee complexe, grafische projecten kunnen maken zonder dat er externe LCD's of displays nodig zijn. Het bijbehorende boek introduceert de hardware en de ingebouwde aansluitingen van het CYD-bord in detail. Het biedt een reeks projecten van beginners- tot gevorderdenniveau, ontwikkeld met de populaire Arduino IDE 2.0. Zowel basis grafische functies als de krachtige LVGL grafische bibliotheek worden behandeld, met praktische projecten die elke aanpak illustreren. Alle meegeleverde projecten zijn volledig getest en klaar voor gebruik. Het boek bevat blokdiagrammen, circuitschema's, complete codelijsten en stapsgewijze uitleg. Met de LVGL-bibliotheek kunnen lezers moderne, kleurrijke grafische interfaces maken met behulp van widgets zoals knoppen, labels, schuifregelaars, kalenders, toetsenborden, grafieken, tabellen, menu's, animaties en meer. ESP32 Cheap Yellow Display Board Dit ontwikkelbord (ook bekend als "Cheap Yellow Display") wordt aangedreven door de ESP-WROOM-32, een dual-core MCU met geïntegreerde Wi-Fi- en Bluetooth-mogelijkheden. Het werkt op een hoofdfrequentie tot 240 MHz, met 520 KB SRAM, 448 KBROM en 4 MB Flash-geheugen. Het bord is voorzien van een 2,8-inch scherm met een resolutie van 240 x 320 en resistieve aanraking. Bovendien bevat het bord een achtergrondverlichtingsbesturingscircuit, aanraakbesturingscircuit, luidsprekeraandrijfcircuit, lichtgevoelig circuit en RGB-LED-besturingscircuit. Het biedt ook een TF-kaartsleuf, seriële interface, DHT11 temperatuur- en vochtigheidssensorinterface en extra IO-poorten. De module ondersteunt ontwikkeling in Arduino IDE, ESP-IDE, MicroPython en Mixly. Toepassingen Beeldoverdracht voor Smart Home-apparaat Draadloze bewaking Slimme landbouw Draadloze QR-herkenning Signaal van draadloos positioneringssysteem En andere IoT-toepassingen Specificaties Microcontroller ESP-WROOM-32 (Dual-core MCU met geïntegreerde Wi-Fi en Bluetooth) Frequentie Tot 240 MHz (rekenkracht is maximaal 600 DMIPS) SRAM 520 KB ROM 448 KB Flash 4 MB Bedrijfsspanning 5 V Stroomverbruik ca. 115 mA Display 2,8" TFT-kleurenscherm (240 x 320) Touch Resistief Touch Driver chip ILI9341 Afmetingen 50 x 86 mm Gewicht 50 g Downloads GitHub Deze bundel bevat: The ESP32 Cheap Yellow Display Book (normale prijs: € 35) ESP32 Cheap Yellow Display Board (normale prijs: € 25) 1x ESP32 Dev Board met 2,8" display en acryl-behuizing 1x Touchpen 1x Aansluitkabel 1x USB-kabel

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An 8-in-1 test & measurement instrument for the electronics workbench A well-equipped electronics lab is crammed with power supplies, measuring devices, test equipment and signal generators. Wouldn‘t it be better to have one compact device for almost all tasks? Based on the Arduino, a PC interface is to be developed that’s as versatile as possible for measurement and control. It simply hangs on a USB cable and – depending on the software – forms the measuring head of a digital voltmeter or PC oscilloscope, a signal generator, an adjustable voltage source, a frequency counter, an ohmmeter, a capacitance meter, a characteristic curve recorder, and much more. The circuits and methods collected here are not only relevant for exactly these tasks in the "MSR" electronics lab, but many details can also be used within completely different contexts.

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Dit boek is een naslagwerk met praktijkgeoriënteerde formules en tabellen – en geen leerboek met uitvoerige uitleg. De schrijver heeft ook voor gecompliceerde vraagstukken handzame verklaringen, benaderingsformules en rekenvoorbeelden ontwikkeld zonder daarbij zijn toevlucht tot simplificaties te nemen. De logische indeling in 10 hoofdstukken vergemakkelijkt het opzoeken en vinden van de gewenste thema’s. In elk hoofdstuk treft u steeds de vereiste wis- en natuurkundige formules aan alsmede de belangrijkste tabellen. Gelijkstroomkringen (inclusief de beginselen van de elektrotechniek) Wisselstroomkringen Dioden (berekeningen, toepassingen en gelijkrichtschakelingen) Bipolaire transistoren Veldeffecttransistoren (met schemavoorbeelden en berekeningen) Speciale componenten (zoals PTC, NTC, VDR) Operationele versterkers en hun basisschakelingen Vermogenselektronica Meettechniek (nauwkeurigheid, correcties, analoge en digitale meetapparaten) Digitale technieken en binaire signaalwaarden De verzameling formules omvat alle belangrijke details voor ingenieurs en technici in de elektrotechniek en elektronica die zich met onderzoek, ontwikkeling en service bezig houden. Daarnaast is het echter ook bedoeld als naslagwerk voor studenten en docenten in het technisch (beroeps)onderwijs – en zeker ook voor de serieuze hobbyist.

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Easy and Affordable Digital Signal ProcessingThe aim of this book is to teach the basic principles of Digital Signal Processing (DSP) and to introduce it from a practical point of view using the bare minimum of mathematics. Only the basic level of discrete-time systems theory is given, sufficient to implement DSP applications in real time. The practical implementations are described in real time using the highly popular ESP32 DevKitC microcontroller development board. With the low cost and extremely popular ESP32 microcontroller, you should be able to design elementary DSP projects with sampling frequencies within the audio range. All programming is done using the popular Arduino IDE in conjunction with the C language compiler.After laying a solid foundation of DSP theory and pertinent discussions on the main DSP software tools on the market, the book presents the following audio-based sound and DSP projects: Using an I²S-based digital microphone to capture audio sound Using an I²S-based class-D audio amplifier and speaker Playing MP3 music stored on an SD card through an I²S-based amplifier and speaker Playing MP3 music files stored in ESP32 flash memory through an I²S-based amplifier and speaker Mono and stereo Internet radio with I²S-based amplifiers and speakers Text-to-speech output with an I²S-based amplifier and speaker Using the volume control in I²S-based amplifier and speaker systems A speaking event counter with an I²S-based amplifier and speaker An adjustable sinewave generator with I²S-based amplifier and speaker Using the Pmod I²S2 24-bit fast ADC/DAC module Digital low-pass and band-pass real-time FIR filter design with external and internal A/D and D/A conversion Digital low-pass and band-pass real-time IIR filter design with external and internal A/D and D/A conversion Fast Fourier Transforms (FFT)

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