Le Raspberry Pi Pico est un microcontrôleur de haute performance conçu spécialement pour l'informatique physique. N'ayant pas de système d'exploitation, les microcontrôleurs diffèrent des ordinateurs monocartes, comme le Raspberry Pi 4. Le Raspberry Pi Pico peut être programmé pour exécuter efficacement une seule tâche dans des applications de contrôle et de surveillance en temps réel nécessitant de la rapidité. Le 'Pico', comme on l'appelle, est basé sur le microcontrôleur ARM Cortex-M0+ RP2040 à double cœur, rapide, efficace et peu coûteux, fonctionnant jusqu'à 133 MHz et disposant de 264 Ko de SRAM et de 2 Mo de mémoire Flash. Outre sa grande mémoire, le Pico présente des caractéristiques encore plus attrayantes, notamment un grand nombre de broches GPIO et des modules d'interface populaires comme ADC, SPI, I²C, UART et PWM. Pour couronner le tout, il offre des modules de synchronisation rapides et précis, une interface de débogage matériel et un capteur de température interne.Le Raspberry Pi Pico se programme facilement à l'aide des langages de haut niveau les plus courants, tels que MicroPython ou C/C++. Ce livre est une introduction à l'utilisation du microcontrôleur Raspberry Pi Pico avec le langage de programmation MicroPython. L'environnement de développement (IDE) Thonny est utilisé dans tous les projets décrits. Le livre contient plus de 50 projets testés et fonctionnels couvrant les sujets suivants:Installation de MicroPython sur Raspberry Pi Pico à l'aide d'un Raspberry Pi ou d'un PCLes interruptions du Timer et les interruptions externesDes projets sur convertisseur analogique-numérique Utilisation du capteur de température interne et du capteur de température externeDes projets d'enregistrement de donnéesDes projets de PWM, UART, I²C, et SPI Utilisation du Wi-Fi et des applications pour communiquer avec les smartphonesUtilisation de Bluetooth et d'applications pour communiquer avec les smartphonesDes projets sur convertisseur numérique-analogiqueTous les projets présentés dans ce livre sont fonctionnels et ont été entièrement testés. Des connaissances de base en programmation et en électronique sont nécessaires pour suivre les projets. De brèves descriptions, des schémas fonctionnels, des schémas de circuits détaillés et des listings complets des programmes MicroPython sont fournis pour tous les projets décrits. Les lecteurs peuvent trouver les listings des programmes sur la page Web Elektor créée à l'appui de ce livre.

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Projects with Arduino Uno & Raspberry Pi with Examples for the MCP2515 CAN Bus Interface Module This book details the use of the Arduino Uno and the Raspberry Pi 4 in practical CAN bus based projects. Using either the Arduino Uno or the Raspberry Pi with off-the-shelf CAN bus interface modules considerably ease developing, debugging, and testing CAN bus based projects. This book is written for students, practicing engineers, enthusiasts, and for everyone else wanting to learn more about the CAN bus and its applications. The book assumes that the reader has some knowledge of basic electronics. Knowledge of the C and Python programming languages and programming the Arduino Uno using its IDE and Raspberry Pi will be useful, especially if the reader intends to develop microcontroller-based projects using the CAN bus. The book should be a useful source of reference material for anyone interested in finding answers to questions such as: What bus systems are available for the automotive industry? What are the principles of the CAN bus? How can I create a physical CAN bus? What types of frames (or data packets) are available in a CAN bus system? How can errors be detected in a CAN bus system and how dependable is a CAN bus system? What types of CAN bus controllers exist? How do I use the MCP2515 CAN bus controller? How do I create 2-node Arduino Uno-based CAN bus projects? How do I create 3-node Arduino Uno-based CAN bus projects? How do I set the acceptance masks and acceptance filters? How do I analyze data on the CAN bus? How do I create 2-node Raspberry Pi-based CAN bus projects? How do I create 3-node Raspberry Pi-based CAN bus projects?

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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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With the availability of free and open source C/C++ compilers today, you might wonder why someone would be interested in assembler language. What is so compelling about the RISC-V Instruction Set Architecture (ISA)? How does RISC-V differ from existing architectures? And most importantly, how do we gain experience with the RISC-V without a major investment? Is there affordable hardware available? The availability of the Espressif ESP32-C3 chip provides a way to get hands-on experience with RISC-V. The open sourced QEMU emulator adds a 64-bit experience in RISC-V under Linux. These are just two ways for the student and enthusiast alike to explore RISC-V in this book. The projects in this book are boiled down to the barest essentials to keep the assembly language concepts clear and simple. In this manner you will have “aha!” moments rather than puzzling about something difficult. The focus in this book is about learning how to write RISC-V assembly language code without getting bogged down. As you work your way through this tutorial, you’ll build up small demonstration programs to be run and tested. Often the result is some simple printed messages to prove a concept. Once you’ve mastered these basic concepts, you will be well equipped to apply assembly language in larger projects.

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Easy and Affordable Digital Signal Processing The 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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In Get Started with MicroPython on Raspberry Pi Pico, you will learn how to use the beginner-friendly language MicroPython to write programs and connect up hardware to make your Raspberry Pi Pico interact with the world around it. Using these skills, you can create your own electro‑mechanical projects, whether for fun or to make your life easier. Microcontrollers, like RP2040 at the heart of Raspberry Pi Pico, are computers stripped back to their bare essentials. You don’t use monitors or keyboards, but program them to take their input from, and send their output to the input/output pins. Using these programmable connections, you can light lights, make noises, send text to screens, and much more. In Get Started with MicroPython on Raspberry Pi Pico, you will learn how to use the beginner-friendly language MicroPython to write programs and connect up hardware to make your Raspberry Pi Pico interact with the world around it. Using these skills, you can create your own electro‑mechanical projects, whether for fun or to make your life easier. The robotic future is here – you just have to build it yourself. We’ll show you how. About the authors Gareth Halfacree is a freelance technology journalist, writer, and former system administrator in the education sector. With a passion for open-source software and hardware, he was an early adopter of the Raspberry Pi platform and has written several publications on its capabilities and flexibility. Ben Everard is a geek who has stumbled into a career that lets him play with new hardware. As the editor of HackSpace magazine, he spends more time than he really should experimenting with the latest (and not-solatest) DIY tech.

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Du détecteur à la radio définie par logiciel La technologie des radiofréquences (RF) est l'un des domaines qui permet encore de mettre en pratique ses propres idées. D'innombrables variantes de circuits avec des objectifs particuliers laissent place à des expériences et des projets significatifs. Beaucoup de choses ne sont tout simplement pas disponibles dans le commerce. Des radios à détecteur de cristal sans source d'alimentation propre, de simples récepteurs à tube avec une touche de nostalgie, les premières tentatives de réception de Software Defined Radio, des récepteurs spéciaux pour radioamateur, tout cela peut être réalisé avec peu d'effort et comme une parfaite introduction à l'électronique RF. Pendant longtemps, la construction radio a été le premier pas vers l’électronique. Il existe cependant d’autres moyens, notamment via les ordinateurs, les microcontrôleurs et le numérique. Cependant, les racines analogiques de l’électronique sont souvent négligées. La technologie radio élémentaire et les expériences faciles à réaliser sont particulièrement adaptées comme domaine d'apprentissage de l'électronique, car vous pouvez ici commencer par les bases les plus simples. Mais le lien avec la technologie numérique moderne est également évident, par exemple lorsqu'il s'agit de méthodes de réglage modernes telles que PLL et DDS ou de radios DSP modernes. Ce livre vise à donner un aperçu et à présenter une collection de projets RF simples. L'auteur souhaite vous aider à développer vos propres idées, à concevoir vos propres récepteurs et à les tester.

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Develop innovative hardware-based projects in C The Raspberry Pi has traditionally been programmed using Python. Although this is a very powerful language, many programmers may not be familiar with it. C on the other hand is perhaps the most commonly used programming language and all embedded microcontrollers can be programmed using it. The C language is taught in most technical colleges and universities and almost all engineering students are familiar with using it with their projects. This book is about using the Raspberry Pi with C to develop a range of hardware-based projects. Two of the most popular C libraries, wiringPi and pigpio are used. The book starts with an introduction to C and most students and newcomers will find this chapter invaluable. Many projects are provided in the book, including using Wi-Fi and Bluetooth to establish communication with smartphones. Many sensor and hardware-based projects are included. Both wiringPi and pigpio libraries are used in all projects. Complete program listings are given with full explanations. All projects have been fully tested and work. The following hardware-based projects are provided in the book: Using sensors Using LCDs I²C and SPI buses Serial communication Multitasking External and timer interrupts Using Wi-Fi Webservers Communicating with smartphones Using Bluetooth Sending data to the cloud Program listings of all Raspberry Pi projects developed in this book are available on the Elektor website. Readers can download and use these programs in their projects. Alternatively, they can customize them to suit their applications.

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Secure, Modular, Open-Source and Self-Sufficient Ever since the Raspberry Pi was introduced, it has been used by enthusiasts to automate their homes. The Raspberry Pi is a powerful computer in a small package, with lots of interfacing options to control various devices. This book shows you how you can automate your home with a Raspberry Pi. You’ll learn how to use various wireless protocols for home automation, such as Bluetooth, 433.92 MHz radio waves, Z-Wave, and Zigbee. Soon you’ll automate your home with Python, Node-RED, and Home Assistant, and you’ll even be able to speak to your home automation system. All this is done securely, with a modular system, completely open-source, without relying on third-party services. You’re in control of your home, and no one else. At the end of this book, you can install and configure your Raspberry Pi as a highly flexible home automation gateway for protocols of your choice, and link various services with MQTT to make it your own system. This DIY (do it yourself) approach is a bit more laborious than just installing an off-the-shelf home automation system, but in the process, you can learn a lot, and in the end, you know exactly what’s running your house and how to tweak it. This is why you were interested in the Raspberry Pi in the first place, right? Turn your Raspberry Pi into a reliable gateway for various home automation protocols. Make your home automation setup reproducible with Docker Compose. Secure all your network communication with TLS. Create a video surveillance system for your home. Automate your home with Python, Node-RED, Home Assistant and AppDaemon. Securely access your home automation dashboard from remote locations. Use fully offline voice commands in your own language. Downloads Errata on GitHub

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Introduction à la programmation des PLC avec OpenPLC, le premier contrôleur logique programmable entièrement open source utilisé avec le Raspberry Pi, et exemples de Modbus avec Arduino Uno et ESP8266. La programmation de contrôleurs logiques programmables est très courante dans l'industrie et la domotique. Ce livre décrit comment le Raspberry Pi 4 peut être utilisé comme un contrôleur logique programmable. Avant de s'attaquer à la programmation, l'auteur commence par expliquer l'installation du logiciel sur le Raspberry Pi et de l'éditeur de PLC sur le PC, puis il décrit le matériel. Vous trouverez ensuite des exemples intéressants dans les différents langages de programmation conformes à la norme IEC 61131-3. Ce manuel explique également en détail comment utiliser l'éditeur de PLC et comment charger et exécuter les programmes sur le Raspberry Pi. Tous les langages DEfinis dans la norme CEI sont expliqués à l'aide d'exemples, des schémas à contacts (Ladder Diagram) au SFC (Special Function Chart) en passant par le ST (Structured Control Language). Tous les exemples peuvent être téléchargés sur le site Web de l'auteur. La communication réseau fait également l'objet d'une attention particulière. L'Arduino Uno et l'ESP8266 sont programmés comme des modules ModbusRTU ou ModbusTCP pour accéder à des périphériques externes, lire des capteurs et commuter des charges électriques. Les circuits d'E/S conformes à la norme industrielle 24 V pourront retenir votre attention. Le livre se termine par un aperçu des commandes pour ST et LD. Après avoir lu le livre, vous serez en mesure de réaliser vos propres contrôleurs avec le Raspberry Pi.

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An Introduction to Circuit Simulation LTspice, developed by Analog Devices, is a powerful, fast, and free SPICE simulator, schematic capture, and waveform viewer with a large database of components supported by SPICE models from all over the world. Drawing a schematic in LTspice is easy and fast. Thanks to its powerful graphing features, you can visualize the voltages and currents in a circuit, and also the power consumption of its components and much more. This book is about learning to design and simulate electronic circuits using LTspice. Among others, the following topics are treated: DC and AC circuits Signal diodes and Zener diodes Transistor circuits including oscillators Thyristor/SCR, diac, and triac circuits Operational amplifier circuits including oscillators The 555 timer IC Filters Voltage regulators Optocouplers Waveform generation Digital logic simulation including the 74HC family SPICE modeling LTspice is a powerful electronic circuit simulation tool with many features and possibilities. Covering them all in detail is not possible in a book of this size. Therefore, this book presents the most common topics like DC and AC circuit analysis, parameter sweeping, transfer functions, oscillators, graphing, etc. Although this book is an introduction to LTspice, it covers most topics of interest to people engaged in electronic circuit simulation. The book is aimed at electronic/electrical engineers, students, teachers, and hobbyists. Many tested simulation examples are given in the book. Readers do not need to have any computer programming skills, but it will help if they are familiar with basic electronic circuit design and operation principles. Readers who want to dive deeper can find many detailed tutorials, articles, videos, design files, and SPICE circuit models on the Internet. All the simulation examples used in the book are available as files at the webpage of this book. Readers can use these example circuits for learning or modify them for their own applications.

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Une chronique illustrée de la teknologie pour les collectionneurs et les restaurateurs Les oscilloscopes ont apporté une contribution majeure à l'avancement des connaissances humaines, non seulement en électronique, mais dans toutes les sciences, chaque fois qu'une grandeur physique peut être convertie en un signal électrique temporel. Ce livre retrace l'histoire d'un instrument crucial à travers de nombreux produits Tektronix. C’est la société qui a inventé et breveté la plupart des fonctions présentes aujourd’hui dans tous les oscilloscopes. Tek est et sera toujours synonyme d'oscilloscope. En près de 600 pages, avec des centaines de magnifiques photos, schémas, anecdotes et données techniques, vous voyagerez à travers l'histoire de Tektronix dans une superbe édition collector d'un point de vue technique. L’auteur n’a pas peur de mettre la main à la pâte en restaurant son propre équipement Tek. Le voyage commence au début des années 1950. Il se termine dans les années 90, après avoir exploré les tenants et les aboutissants des modèles les plus intéressants des séries 300, 400, 500, 5000, 7000 et 11000, des tubes aux technologies hybrides avancées. Téléchargements NOUVEAU : Supplément gratuit (136 pages, 401 Mo)

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A Reference and User Guide for the Arduino Uno Hardware and Firmware A manual providing up-to-date hardware information for the popular Arduino Uno, the easy to use open-source electronics platform used by hobbyists, makers, hackers, experimenters, educators and professionals. Get all the information you need on the hardware and firmware found on Arduino Uno boards in this handy reference and user guide. Ideal for the workbench or desktop Contains all of the Arduino Uno hardware information in one place Covers Arduino / Genuino Uno revision 3 and earlier boards Easily find hardware technical specifications with explanations Pin reference chapter with interfacing examples Diagrams and illustrations for easy reference to alternate pin functions and hardware connections Learn to back up and restore the firmware on the board or load new firmware Basic fault finding and repair procedures for Arduino Uno boards Power supply circuits simplified and explained Mechanical dimensions split into five easy to reference diagrams Contains circuit diagrams, parts list and board layout reference to locate components easily

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Projets avec Thonny-IDE, uPyCraft-IDE et ESP32 Le langage de programmation « Python » a connu un énorme essor ces dernières années. Enfin, divers systèmes monocarte tels que le Raspberry Pi ont contribué à sa popularité. Mais Python a également été largement utilisé dans d’autres domaines, comme l’intelligence artificielle (IA) ou l’apprentissage automatique (ML). Il est donc évident d'utiliser également Python ou la variante « MicroPython » pour une utilisation dans les SoC (Systems on Chip). Des contrôleurs puissants tels que l'ESP32 d'Espressif Systems offrent d'excellentes performances ainsi que des fonctionnalités Wi-Fi et Bluetooth à un prix abordable. Avec ces fonctionnalités, la scène Maker a été prise d’assaut. Comparé à d'autres contrôleurs, l'ESP32 dispose d'une mémoire Flash et SRAM nettement plus grande, ainsi que d'une vitesse de processeur beaucoup plus élevée. Grâce à ces caractéristiques, la puce convient non seulement aux applications C classiques, mais également à la programmation avec MicroPython. Ce livre présente l'application des systèmes modernes à puce unique. En plus du contexte technique, l'accent est mis sur MicroPython lui-même. Après l’initiation au langage, les compétences en programmation acquises sont immédiatement mises en pratique. Les projets individuels conviennent aussi bien à une utilisation en laboratoire qu'à des applications quotidiennes. Ainsi, outre l’effet d’apprentissage réel, l’accent est également mis sur le plaisir de construire des appareils complets et utiles. En utilisant des planches à pain de laboratoire, des circuits de toutes sortes peuvent être réalisés avec peu d'effort, transformant les tests et le débogage des projets 100 % homebrew en un plaisir instructif. Les différentes applications, telles que les stations météorologiques, les voltmètres numériques, les télémètres à ultrasons, les lecteurs de cartes RFID ou les générateurs de fonctions, rendent les projets présentés parfaitement adaptés aux cours pratiques ou aux travaux de matières et d'études en sciences naturelles ou aux cours de sciences et technologies.

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From basics to flows for sensors, automation, motors, MQTT, and cloud services This book is a learning guide and a reference. Use it to learn Node-RED, Raspberry Pi Pico W, and MicroPython, and add these state-of-the-art tools to your technology toolkit. It will introduce you to virtual machines, Docker, and MySQL in support of IoT projects based on Node-RED and the Raspberry Pi Pico W. This book combines several elements into a platform that powers the development of modern Internet of Things applications. These elements are a flow-based server, a WiFi-enabled microcontroller, a high-level programming language, and a deployment technology. Combining these elements gives you the tools you need to create automation systems at any scale. From home automation to industrial automation, this book will help you get started. Node-RED is an open-source flow-based development tool that makes it easy to wire together devices, APIs, and online services. Drag and drop nodes to create a flowchart that turns on your lights at sunset or sends you an email when a sensor detects movement. Raspberry Pi Pico W is a version of the Raspberry Pi Pico with added 802.11n Wi-Fi capability. It is an ideal device for physical computing tasks and an excellent match to the Node-RED. Quick book facts Project-based learning approach. Assumes no prior knowledge of flow-based programming tools. Learn to use essential infrastructure tools in your projects, such as virtual machines, Docker, MySQL and useful web APIs such as Google Sheets and OpenWeatherMap. Dozens of mini-projects supported by photographs, wiring schematics, and source code. Get these from the book GitHub repository. Step-by-step instructions on everything. All experiments are based on the Raspberry Pi Pico W. A Wi-Fi network is required for all projects. Hardware (including the Raspberry Pi Pico W) is available as a kit. Downloads GitHub

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Practical Multitasking Fundamentals Programming embedded systems is difficult because of resource constraints and limited debugging facilities. Why develop your own Real-Time Operating System (RTOS) as well as your application when the proven FreeRTOS software is freely available? Why not start with a validated foundation? Every software developer knows that you must divide a difficult problem into smaller ones to conquer it. Using separate preemptive tasks and FreeRTOS communication mechanisms, a clean separation of functions is achieved within the entire application. This results in safe and maintainable designs. Practicing engineers and students alike can use this book and the ESP32 Arduino environment to wade into FreeRTOS concepts at a comfortable pace. The well-organized text enables you to master each concept before starting the next chapter. Practical breadboard experiments and schematics are included to bring the lessons home. Experience is the best teacher. Each chapter includes exercises to test your knowledge. The coverage of the FreeRTOS Application Programming Interface (API) is complete for the ESP32 Arduino environment. You can apply what you learn to other FreeRTOS environments, including Espressif’s ESP-IDF. The source code is available from GitHub. All of these resources put you in the driver’s seat when it is time to develop your next uber-cool ESP32 project. What you will learn: How preemptive scheduling works within FreeRTOS The Arduino startup “loopTask” Message queues FreeRTOS timers and the IDLE task The semaphore, mutex, and their differences The mailbox and its application Real-time task priorities and its effect Interrupt interaction and use with FreeRTOS Queue sets Notifying tasks with events Event groups Critical sections Task local storage The gatekeeper task

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59 Experiments with Arduino IDE and Python The main aim of this book is to teach the Arduino IDE and MicroPython programming languages in ESP32 based projects, using the highly popular ESP32 DevKitC development board. Many simple, basic, and intermediate level projects are provided in the book using the Arduino IDE with ESP32 DevKitC. All projects have been tested and work. Block diagrams, circuit diagrams, and complete program listings of all projects are given with explanations. In addition, several projects are provided for programming the ESP32 DevKitC using MicroPython. The projects provided in this book are designed to teach the following features of the ESP32 processor: GPIOs Touch sensors External interrupts Timer interrupts I²C and I²S SPI PWM ADC DAC UART Hall sensor Temperature sensor Infrared controller Reading and writing to SD card Reading and writing to flash memory RTC timer Chip ID Security and encryption Wi-Fi and network programming Bluetooth BLE programming Communication mobile devices Low power design ESP-IDF programming The projects have been organized with increasing levels of difficulty. Readers are encouraged to tackle the projects in the order given. A specially prepared hardware 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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An Ultra-Rapid Programming Course This book serves as the very first step to for novices to learn Python programming. The book is divided into ten chapters. In the first chapter, readers are introduced to the basics of Python. It has the detailed instructions for installation on various platforms such as macOS, Windows, FreeBSD, and Linux. It also covers the other aspects of Python programming such as IDEs and Package Manager. The second chapter is where the readers get an opportunity to have a detailed hands-on with Python programming. It covers a group of built-in data structures popularly known as Python Collections. The third chapter covers the important concepts of strings, functions, and recursion. The fourth chapter focuses on the Object-Oriented Programming with Python. The fifth chapter discusses most commonly used custom data structures such as stack and queue. The sixth chapter spurs the creativity of the readers with Python’s Turtle graphics library. The seventh chapter explores animations and game development using the Pygame library. The eighth chapter covers handling data stored in a variety of file formats. The ninth chapter covers the area of Image processing with Wand library in Python. The tenth and the final chapter presents an array of assorted handy topics in Python. The entire book follows a step-by-step approach. The explanation of the topic is always followed by a detailed code example. The code examples are also explained in suitable detail and they are followed by the output in the form of text or screenshot wherever possible. Readers will become comfortable with Python programming language by closely following the concepts and the code examples in this book. The book also has references to external resources for readers to explore further. A download of the software code, and links to tutorial videos can be found on the Elektor website.

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A Handbook on DIY Nowadays, security problems are rarely properly solved or correctly addressed. Electronic security is only part of the chain in making a system secure. Electronic security is usually addressed as network or software security, neglecting other aspects, but the chain is only as strong as its weakest link. This book is about electronic hardware security, with an emphasis on problems that you can solve on a shoestring DIY budget. It deals mostly with secure communications, cryptosystems, and espionage. You will quickly appreciate that you can’t simply buy a trustworthy and reliable cryptosystem off the shelf. You will then realise that this applies equally to individuals, corporations, and governments. If you want to increase your electronic security awareness in a world already overcrowded with networks of microphones and cameras, this is a book for you. Furthermore, if you want to do something DIY by designing and expanding upon simple electronic systems, please continue reading. Some of the devices described are already published as projects in the Elektor magazine. Some are still ideas yet to be worked out. Complexity is the main enemy of security, so we'll try to keep to simple systems. Every chapter will analyse real-life espionage events or at least several hypothetical scenarios that will hopefully spark your imagination. The final goal is to build a security-conscious mindset (or “to get into a head of a spy”) which is necessary to recognise possible threats beforehand, to design a truly secure system. Don’t bother reading if: you think you and your secrets are 100% safe and secure you think somebody else can effectively handle your security you think conspiracy theories only exist in theory – Telefunken’s masterpiece the “FS-5000 Harpoon” was built on one!

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Introduction pratique à la modélisation 3D du boîtier au panneau avant Intégrer un composant vintage, créer un boîtier d'aspect professionnel pour un circuit imprimé ou même concevoir un appareil complexe avec un châssis - ces défis et bien d'autres se transforment en un plaisir stimulant avec FreeCAD. Une fois que vous avez internalisé les processus de base, votre imagination n’a pratiquement aucune limite. Commencer à utiliser un nouveau logiciel n’est jamais simple – surtout avec un outil aussi polyvalent que FreeCAD. Des composants individuels gérables, mais en même temps faciles à utiliser, constituent le point de départ de ce livre. L'assemblage ultérieur de ces composants aboutit à des assemblages. Dans l'univers FreeCAD, une trajectoire réalisable est démontrée. La procédure décrite est illustrative afin que les exemples soient facilement appliqués aux tâches personnalisées. Les appareils ont été réalisés par l'auteur et illustrés de photos. Créer un design 3D demande quelques efforts, mais l’investissement initial est vite rentable. Outre la représentation spatiale impressionnante des projets, les dessins extraits constituent une base solide pour la documentation et la production. Les fonctionnalités étendues de FreeCAD, telles que le dépliage de pièces en tôle, augmentent considérablement l'efficacité et font avancer les modèles vers un assemblage pratique. Bientôt, vous ne voudrez plus vous passer de FreeCAD !

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