Suchergebnisse für "elektor or magazine or nl or maart or april or 2019 or pdf"

The intention of this book is to offer the reader understandings, ideas and solutions from the perspective of a workbench technician and electronics hobbyist. It is a descriptive text with many tables of useful data, servicing tips and supplementary notes of not so common knowledge. Today there is a re-emerging, nostalgic interest in vinyl records and associated music entertainment gear. With this interest, there is a paralleled market for the repair of this gear. This ‘hands-on’ servicing guide opens with fundamental considerations of the work space of repair and servicing. This includes a comprehensive discussion of essential test equipment and tools. Two chapters are devoted to obtaining servicing information about repair and obtaining spare parts. A key chapter is on general diagnosis and testing and includes the discussion of resistance, capacitance and inductance. These electrical properties are regularly in the mind of the repairer, so understanding of them is a key objective of this book. The next chapter is about time saving repair techniques and ensuring quality repair. The remaining chapters discuss entertainment equipment itself. Each of the chapters begins with an orderly discussion of the theory of operation and common and not so common problems specific to the equipment. All chapters conclude with a summary.

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Computer vision is probably the most exciting branch of image processing, and the number of applications in robotics, automation technology and quality control is constantly increasing. Unfortunately entering this research area is, as yet, not simple. Those who are interested must first go through a lot of books, publications and software libraries. With this book, however, the first step is easy. The theoretically founded content is understandable and is supplemented by many practical examples. Source code is provided with the specially developed platform-independent open source library IVT in the programming language C/C++. The use of the IVT is not necessary, but it does make for a much easier entry and allows first developments to be quickly produced. The authorship is made up of research assistants of the chair of Professor Ruediger Dillmann at the Institut für Technische Informatik (ITEC), Universitaet Karlsruhe (TH). Having gained extensive experience in image processing in many research and industrial projects, they are now passing this knowledge on. Among other subjects, the following are dealt with in the fundamentals section of the book: Lighting, optics, camera technology, transfer standards, camera calibration, image enhancement, segmentation, filters, correlation and stereo vision. The practical section provides the efficient implementation of the algorithms, followed by many interesting applications such as interior surveillance, bar code scanning, object recognition, 3-D scanning, 3-D tracking, a stereo camera system and much more.

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For Raspberry Pi, ESP32 and nRF52 with Python, Arduino and Zephyr Bluetooth Low Energy (BLE) radio chips are ubiquitous from Raspberry Pi to light bulbs. BLE is an elaborate technology with a comprehensive specification, but the basics are quite accessible. A progressive and systematic approach will lead you far in mastering this wireless communication technique, which is essential for working in low power scenarios. In this book, you’ll learn how to: Discover BLE devices in the neighborhood by listening to their advertisements. Create your own BLE devices advertising data. Connect to BLE devices such as heart rate monitors and proximity reporters. Create secure connections to BLE devices with encryption and authentication. Understand BLE service and profile specifications and implement them. Reverse engineer a BLE device with a proprietary implementation and control it with your own software. Make your BLE devices use as little power as possible. This book shows you the ropes of BLE programming with Python and the Bleak library on a Raspberry Pi or PC, with C++ and NimBLE-Arduino on Espressif’s ESP32 development boards, and with C on one of the development boards supported by the Zephyr real-time operating system, such as Nordic Semiconductor's nRF52 boards. Starting with a very little amount of theory, you’ll develop code right from the beginning. After you’ve completed this book, you’ll know enough to create your own BLE applications.

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All you need to know about good acoustics and sound systems in performance and worship spaces! Everyone knows that the ability to hear music in balance and to understand speech is essential in any space used for performance or worship. Unfortunately, in the early 21st century, we find that buildings with good acoustics are the exception rather than the rule. Much of the fault leading to this result can be traced to the widespread perception that acoustics is a black art. In fact, scientific acoustics as developed in the last century is a well-defined engineering practice that can lead to predictable excellent results. A basic, non-engineering understanding of acoustics will help building owners, theater managers, ministers and teachers of music, performers, and other professionals to achieve their goals of excellent acoustics in venues with which they work. Performers having a basic understanding of acoustics will be able to make the most of the acoustics of the venue in which they perform. This book helps those responsible for providing good acoustics in performance and worship spaces to understand the variables and choices entailed in proper acoustic design for performance and worship. Practicing acoustical consultants will find the book a useful reference as well. The level of presentation is comfortable and straightforward without being simplistic. If correct acoustical principles are incorporated into the design, renovation, and maintenance of performance and worship venues, good acoustics will be the result.

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Einfache und kostengünstige digitale Signalverarbeitung Ziel dieses Buches ist es, die Grundprinzipien der digitalen Signalverarbeitung (DSP) zu vermitteln und sie unter Verwendung eines Minimums an Mathematik aus praktischer Sicht einzuführen. Es wird nur das Grundniveau der Theorie zeitdiskreter Systeme vermittelt, das ausreicht, um DSP-Anwendungen in Echtzeit zu implementieren. Die praktischen Umsetzungen werden in Echtzeit mithilfe des beliebten Mikrocontroller-Entwicklungsboards ESP32 DevKitC beschrieben. Mit dem kostengünstigen und äußerst beliebten ESP32-Mikrocontroller sollten Sie in der Lage sein, grundlegende DSP-Projekte mit Abtastfrequenzen im Audiobereich zu entwerfen. Die gesamte Programmierung erfolgt mit der beliebten Arduino IDE in Verbindung mit dem C-Sprachcompiler. Nachdem das Buch eine solide Grundlage der DSP-Theorie und relevante Diskussionen über die wichtigsten DSP-Softwaretools auf dem Markt gelegt hat, werden die folgenden audiobasierten Sound- und DSP-Projekte vorgestellt: Verwendung eines I²S-basierten digitalen Mikrofons zur Audioaufnahme Verwendung eines I²S-basierten Klasse-D-Audioverstärkers und Lautsprechers Wiedergabe von auf einer SD-Karte gespeicherter MP3-Musik über einen I²S-basierten Verstärker und Lautsprecher Wiedergabe von im ESP32-Flash-Speicher gespeicherten MP3-Musikdateien über einen I²S-basierten Verstärker und Lautsprecher Mono- und Stereo-Internetradio mit I²S-basierten Verstärkern und Lautsprechern Text-zu-Sprache-Ausgabe mit einem I²S-basierten Verstärker und Lautsprecher Verwendung der Lautstärkeregelung in I²S-basierten Verstärker- und Lautsprechersystemen Ein sprechender Veranstaltungszähler mit einem I²S-basierten Verstärker und Lautsprecher Ein einstellbarer Sinusgenerator mit I²S-basiertem Verstärker und Lautsprecher Verwendung des schnellen 24-Bit-ADC/DAC-Moduls Pmod I²S2 Digitales Tiefpass- und Bandpass-Echtzeit-FIR-Filterdesign mit externer und interner A/D- und D/A-Wandlung Digitales Tiefpass- und Bandpass-Echtzeit-IIR-Filterdesign mit externer und interner A/D- und D/A-Wandlung Schnelle Fourier-Transformationen (FFT)

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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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From Simple Ciphers to Secure Systems Understanding how to apply cryptography on modern microcontrollers is essential for building secure, reliable, and trustworthy systems. This book explains cryptography in the context of embedded hardware, from classical ciphers that illustrate core principles to modern techniques such as AES for practical high-security applications. By combining mathematical theory with real-world microcontroller implementations, readers learn not only how cryptography works, but also how to implement it effectively on systems with limited processing power and memory. The book is intended for students starting out in cryptography, hobbyists securing personal projects, and engineers looking for a structured guide to embedded security. The book covers these key topics in applied cryptography: Classical ciphers on Arduino Uno and Raspberry Pi Pico, with full programs: Spartan Scytale, Hebrew Atbash, Caesar, ROT13, Alberti Disk, Vigenère, Affine, Polybius, Playfair, Beaufort, Ottoman Codebook, and One-Time Pad. Hacking classical ciphers using microcontrollers, with examples. Pseudo-random (PRNG) and true random number generation (TRNG) on microcontrollers. Symmetric-key cryptography with full programs: DES and AES-128/256. Memory and speed constraints of cryptography on microcontrollers. Asymmetric cryptography: public/private keys, digital signatures, key distribution and derivation (KDF), RSA, and SHA-256 implementations. A complete secure communication program using RSA and AES-256. A glossary of commonly used cryptography terms.

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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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USB-Logikanalysatoren am PC mit Arduino, Raspberry Pi und Co Schritt-für-Schritt-Anleitungen führen Sie in die Analyse moderner Protokolle von I²C, SPI, UART, RS-232, NeoPixel, WS28xx, HD44780 und 1-Wire ein. Anhand zahlreicher Experimentierschaltungen mit dem Raspberry Pi Pico, Arduino Uno und dem Bus Pirate üben Sie die praxisnahe Anwendung gängiger USB-Logikanalysatoren ein. Alle in diesem Buch vorgestellten Experimentierschaltungen wurden gründlich getestet und sind funktionsfähig. Die notwendigen Programmlistings sind enthalten, es sind keine besonderen Programmier- oder Elektronikkenntnisse für diese Schaltungen notwendig. Es werden die Programmiersprachen MicroPython und C mit den Entwicklungsumgebungen Thonny und Arduino IDE eingesetzt. Dieses Buch verwendet mehrere Modelle flexibler und weit verbreiteter USB-Logikanalysatoren und zeigt die Stärken und Schwächen jeder Preisklasse. Sie werden herausfinden, welche Kriterien für Ihre Arbeit wichtig sind und in der Lage sein, das passende Gerät für Sie zu finden. Egal ob Arduino, Raspberry Pi oder Raspberry Pi Pico: Die abgebildeten Beispielschaltungen ermöglichen einen schnellen Einstieg in die Protokollanalyse und können auch als Grundlage für eigene weitere Experimente dienen. Sie werden alle wichtigen Begriffe und Zusammenhänge kennenlernen, eigene Experimente durchführen, selbstständig Protokolle analysieren und nach der Lektüre dieses Buches – im Bereich der digitalen Signale und Protokolle – ein umfassendes Wissen aufgebaut haben.

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Create Models for 3D Printing, CNC Milling, Process Communication and Documentation Engineers dread designing 3D models using traditional modeling software. OpenSCAD takes a refreshing and completely different approach. Create your models by arranging geometric solids in a JavaScript-like language, and use them with your 3D printer, CNC mill, or process communication. OpenSCAD differs from other design systems in that it uses programmatical modeling. Your model is made up of primitives that are invoked using a C-, Java- or Python-like language. This approach to model design is close to the “mechanical work” done in the real world and appeals to engineers and others who are not a member of the traditional creative class. OpenSCAD also provides a wide variety of comfort functions that break the 1:1 relationship between code and geometry. This book demonstrates the various features of the programming language using practical examples such as a replacement knob for a LeCroy oscilloscope, a wardrobe hanger, a container for soap dispensers, and various other real-life examples. Written by an engineer with over 15 years of experience, this book is intended for Linux and Windows users alike. If you have programming experience in any language, this book will have you producing practical three-dimensional objects in short order!

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Dieser vollständige Programmierkurs für den ESP32-Mikrocontroller umfasst ein Lehrbuch, ein Komponenten-Kit, praxisnahe Projekte sowie einen umfassenden Online-Kurs mit Simulationen. Er eignet sich ideal für das schrittweise Erlernen der Embedded-Programmierung in MicroPython anhand eines praktischen, hands-on Ansatzes. Eine praxisnahe Einführung in Embedded Systems mit dem ESP32 Dieser Kurs richtet sich an Personen ohne Vorkenntnisse im Bereich Embedded Systems, die einen strukturierten und beispielbasierten Einstieg suchen. Ein Kit bestehend aus LEDs und Widerständen, Schaltern, Sensoren und Aktoren, Displays, einem Breadboard und Kabeln sowie weiteren Komponenten ist enthalten. Diese werden im Kurs verwendet, um Beispielanwendungen zu veranschaulichen. Vorkenntnisse mit Arduino oder Embedded-Entwicklung sind nicht erforderlich. Jeder Abschnitt enthält praktische Beispiele und Mini-Projekte, die wichtige Konzepte festigen und zur weiteren Vertiefung anregen. Am Ende des Kurses werden Sie nicht nur in der Lage sein, die Beispiele nachzuvollziehen, sondern auch eigene Ideen und Anwendungen umzusetzen. Was werden Sie lernen? Programmierung von Mikrocontrollern in MicroPython mit dem ESP32 unter Verwendung der Thonny IDE Arbeiten mit digitalen Ein- und Ausgängen, Auslesen von Tastern und Encodern, Steuern von LEDs und Relais Auslesen analoger Eingänge, Spannungen und analoger Sensoren Erzeugung analoger Ausgangssignale und PWM Verwendung serieller Kommunikation wie UART, I²C und SPI zur Steuerung von Displays und zum Auslesen digitaler Sensoren und SD-Karten Zeitmanagement Arbeiten mit Interrupts Echtzeit-Sensordatenerfassung und Steuerung über Taster, LEDs und Displays Steuerung von Aktoren wie Relais und Servomotoren Für wen ist dieser Kurs geeignet? Studierende und Selbstlerner im Bereich Embedded Systems Makers und IoT-Enthusiasten, die ihre Hardware-Kenntnisse verbessern möchten Lehrkräfte und Trainer, die sofort einsetzbares Unterrichtsmaterial suchen Was ist im Lieferumfang enthalten? Zugang zum vollständigen Kurs auf der Elektor Academy Pro-Lernplattform ESP32 Mikrocontroller-Board (+ USB-Kabel) Buch: Programming Microcontrollers in MicroPython Downloadbare Projektdateien für jedes Modul Komponenten-Set: 2× LED, rot, 5 mm LED, grün, 5 mm 3× Widerstand, 470 Ω, 0,25 W LDR Potentiometer, 10 kΩ, linear Taster Drehencoder-Modul Relaismodul DHT22 Feuchtigkeits- und Temperatursensor TM1637-kompatibles 4-stelliges 7-Segment-Display MPU-6050 IMU mit Stiftleisten SSD1306-kompatibles I²C OLED-Display Micro-SD-Kartenadapter mit Stiftleiste Buzzer SG90 Mikro-Servo ILI9341-kompatibles SPI 240×320 TFT-Display 20× Jumperkabel Breadboard Alle Programmierkurse (und Unterschiede im Inhalt) Kurs Arduino Raspberry Pi Pico with Arduino C/C++ ESP32 with Arduino C/C++ Raspberry Pi Pico with MicroPython ESP32 with MicroPython Online-Kurs Access to Arduino Course Access to Pico with Arduino C/C++ Course Access to ESP32 with Arduino C/C++ Course Access to Pico with MicroPython Course Access to ESP32 with MicroPython Course Board Uno R3 Raspberry Pi Pico ESP32 Raspberry Pi Pico ESP32 Buch Programming Microcontrollers in C/C++ Using Arduino Programming Microcontrollers in C/C++ Using Arduino Programming Microcontrollers in C/C++ Using Arduino Programming Microcontrollers in MicroPython Programming Microcontrollers in MicroPython Kit 40-teiliges Komponenten-Set 40-teiliges Komponenten-Set 40-teiliges Komponenten-Set 40-teiliges Komponenten-Set 40-teiliges Komponenten-Set

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Program, build, and master 60+ projects with the Wireless RP2040 The Raspberry Pi Pico and Pico W are based on the fast, efficient, and low-cost dual-core ARM Cortex M0+ RP2040 microcontroller chip running at up to 133 MHz and sporting 264 KB of SRAM and 2 MB of Flash memory. Besides spacious memory, the Pico and Pico W offer many GPIO pins, and popular peripheral interface modules like ADC, SPI, I²C, UART, PWM, timing modules, a hardware debug interface, and an internal temperature sensor. The Raspberry Pi Pico W additionally includes an on-board Infineon CYW43439 Bluetooth and Wi-Fi chipset. At the time of writing this book, the Bluetooth firmware was not yet available. Wi-Fi is however fully supported at 2.4 GHz using the 802.11b/g/n protocols. This book is an introduction to using the Raspberry Pi Pico W in conjunction with the MicroPython programming language. The Thonny development environment (IDE) is used in all of the 60+ working and tested projects covering the following topics: Installing the MicroPython on Raspberry Pi Pico using a Raspberry Pi or a PC Timer interrupts and external interrupts Analogue-to-digital converter (ADC) projects Using the internal temperature sensor and external sensor chips Using the internal temperature sensor and external temperature sensor chips Datalogging projects PWM, UART, I²C, and SPI projects Using Bluetooth, WiFi, and apps to communicate with smartphones Digital-to-analogue converter (DAC) projects All projects are tried & tested. They can be implemented on both the Raspberry Pi Pico and Raspberry Pi Pico W, although the Wi-Fi-based subjects will run on the Pico W only. Basic programming and electronics experience are required to follow the projects. Brief descriptions, block diagrams, detailed circuit diagrams, and full MicroPython program listings are given for all projects.

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