To many people, the thermionic valve or electron tube is history. However, whether it is nostalgia, interest in the technical parameters, the appeal of a gleaming amplifier chassis with softly glowing valves, respect for the technical know-how of an earlier generation, or perhaps the firm conviction that the sound of a valve cannot be bettered, it is a fact that the valve is making a come-back. This book contains, apart from construction projects for preamplifiers, power amplifiers, and two amplifiers for musical instruments, information on the operation of electron tubes, while the first chapter gives a short history of the valve.

Build Your Own Audio Valve Amplifiers

Rainer Zur Linde

Elektor

3D Printing and Autodesk 123D Design

Misao Mizuno

Technology is constantly changing. New microcontrollers become available every year. The one thing that has stayed the same is the C programming language used to program these microcontrollers. If you would like to learn this standard language to program microcontrollers, then this book is for you! Arduino is the hardware platform used to teach the C programming language as Arduino boards are available worldwide and contain the popular AVR microcontrollers from Atmel. Atmel Studio is used as the development environment for writing C programs for AVR microcontrollers. It is a full-featured integrated development environment (IDE) that uses the GCC C software tools for AVR microcontrollers and is free to download. At a glance: - Start learning to program from the very first chapter - No programming experience is necessary - Learn by doing - type and run the example programs - A fun way to learn the C programming language - Ideal for electronic hobbyists, students and engineers wanting to learn the C programming language in an embedded environment on AVR microcontrollers - Use the free full-featured Atmel Studio IDE software for Windows - Write C programs for 8-bit AVR microcontrollers as found on the Arduino Uno and MEGA boards - Example code runs on Arduino Uno and Arduino MEGA 2560 boards and can be adapted to run on other AVR microcontrollers or boards - Use the AVR Dragon programmer / debugger in conjunction with Atmel Studio to debug C programs

C Programming with Arduino

Warwick A. Smith

Arduino Uno - 45 Projects for Beginners and Experts

Engineering & Transportation

Bert Van Dam

Engineering

Android App Development for Electronics Designers

Dogan, Ibrahim

Printed circuit boards (PCB) are, perhaps, the most undervalued component of modern electronics. The design of complex printed circuit boards was something that only skilled engineers could do. During the last 20 years, we have seen high-end engineering capabilities becoming available to virtually anyone that wants them. CAD tools and manufacturing facilities for PCBs are one mouse click away. KiCad is one of those tools. Perhaps the world s most popular (and best) computer-aided design tool for making printed circuit boards, KiCad is open source, fully featured, well-funded and supported, well documented. It is the perfect tool for electronics engineers and hobbyists alike, used to create amazing PCBs. KiCad has reached maturity and is now a fully featured and stable choice for anyone that needs to design custom PCBs. This book will teach you to use KiCad (version 5.0). Whether you are a hobbyist or an electronics engineer, this book will help you become productive quickly, and start designing your own boards. This book takes a practical approach to learning. It consists of four projects of incremental difficulty and recipes. 
 The projects will teach you basic and advanced features of KiCad. If you have absolutely no prior knowledge of PCB design, you will find that the introductory project will teach you the very basics. You can then continue with the rest of the projects. You will design a board for a breadboard power supply, a tiny Raspberry Pi HAT, and an Arduino clone with extended memory and clock integrated circuits. The book includes a variety of recipes for frequently used activities. You can use this part as a quick reference at any time. The book is supported by the author via a page that provides access to additional resources.

KiCad Like a Pro

Computers & Technology

Dr Peter Dalmaris

Software

The Complete ESP32 Projects Guide

This book is about developing apps for Android compatible mobile devices using the MIT App Inventor online development environment. MIT App Inventor projects can be in either standalone mode or use an external processor. In standalone mode, the developed application runs only on the mobile device. In external processor-based applications, the mobile device communicates with an external microcontroller-based processor, such as Raspberry Pi, Arduino, ESP8266, ESP32, etc. In this book, many tested and fully working projects are given both in standalone mode and using an external processor. Full design steps, block programs, circuit diagrams, QR codes and full program listings are given for all projects.The projects developed in this book include:Using the text-to-speech componentIntonating a received SMS messageSending SMS messagesMaking telephone calls using a contacts listUsing the GPS and Pin-pointing our location on a mapSpeech recognition and speech translation to another languageControlling multiple relays by speech commandsProjects for the Raspberry Pi, ESP32 and Arduino using Bluetooth and Wi-FiMIT APP Inventor and Node-RED projects for the Raspberry PiThe book is unique in that it is currently the only book that teaches how to develop projects using Wi-Fi and Node-RED with MIT App Inventor. The book is aimed at students, hobbyists, and anyone interested in developing apps for mobile devices.All projects presented in this book have been developed using the MIT App Inventor visual programming language. There is no need to write any text-based programs. All projects are compatible with Android-based mobile devices. Full program listings for all projects as well as detailed program descriptions are given in the book. Users should be able to use the projects as they are presented, modifying them to suit their own needs.

MIT App Inventor Projects

Ibrahim, Dogan

The latest iteration of KiCad, the world’s best free-to-use Printed Circuit Board tool, is packed with features usually found only in expensive commercial CAD tools. This modern, cross-platform application suite built around schematic and design editors, with auxiliary applications is a stable and mature PCB tool. KiCad 6 is a perfect fit for electronic engineers and hobbyists. 
Here are the most significant improvements and features in KiCad 6, both over and under the hood: Modern user interface, completely redesigned from earlier versions Improved and customizable electrical and design rule checkers Theme editor allowing you to customize KiCad on your screen Ability to import projects from Eagle, CADSTART, and more Enhanced bus handling Full control over the presentation of information by the layout editor Filters define selectable elements Enhanced interactive router helps you draw single tracks and differential pairs with precision New or enhanced tools to draw tracks, measure distances, tune track lengths, etc. Enhanced tool for creating filled zones Easy data exchange with other CAD applications Realistic ray-tracing capable 3D viewer Huge community of contributors that make KiCad better every day Rich repositories of symbol, footprint, and 3D shape libraries 
This book will teach you to use KiCad through a practical approach. It will help you become productive quickly and start designing your own boards. Example projects (e.g., a simple breadboard power supply and a PCBA 4×8×8 LED matrix array) illustrate the basic features of KiCad, even if you have no prior knowledge of PCB design. The author describes the entire workflow from schematic entry to the intricacies of finalizing the files for PCB production and offers sound guidance on the process. Further full-fledged projects, of incremental difficulty, will b

KiCad 6 Like A Pro - Fundamentals and Projects

Peter Dalmaris

Building a High-Tech Alarm System with Raspberry Pi

William Pretty

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Books by Elektor