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RFID technology has conquered many areas in which barcodes, magnetic strips and contact smartcards were used previously. Everyday applications, such as electronic ticketing, access cards, debit cards and electronic identity documents would not be possible without this technology. MIFARE is the most widely used RFID technology, and this book provides a practical and comprehensive introduction to it. Among other things, the initial chapters cover physical fundamentals, relevant standards, RFID antenna design, security considerations and cryptography. The complete design of a reader’s hardware and software is described in detail. The reader’s firmware and the associated PC software support programming using any .NET language. The specially developed PC program, “Smart Card Magic.NET”, is a simple development environment that supports sending commands to a card at the click of a mouse, as well as the ability to create C# scripts. Alternatively, one may follow all of the examples using Visual Studio 2010 Express Edition. Finally, the major smart card reader API standards are introduced. The focus is on programming contactless smartcards using standard PC/SC readers using C/C++, Java and C#.

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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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New LCR Meter 50 Hz - 2 MHz Part 1automatic impedance measuring bridge measures the resistance, capacitance and inductance of components with an impedance of 10 mΩ to 100 MΩ From Ding-Dong Door Chime to IoT DoorbellIntegrate your doorbell in Home Assistant with ESPHome Battery ManagementWhat to Be Aware of When Using (Lithium) Batteries Starting Out in ElectronicsEasier Than Imagined! Small Circuits RevivalFrom the Elektor Suggestions Box Breadboard Graphics with Fritzing Analogue Filter Design (Part 2)Active Filters Homelab Tours: The Lap CounterA Project for Mini Petrol-Heads Developer’s ZoneTips & Tricks, Best Practices and Other Useful Information Review: Rigol DS1054Z Four-Channel Oscilloscope Christmas CandleBlow It Out! Tunable Valve Sinewave Generator Retro is back! Review: The Rigol DG2072 Generator KiCad Plugins and Add-ons Differential Oscilloscope Current Probe 2.0Measure Currents Using Your Oscilloscope The Hewlett-Packard Interface LoopConnect the world! The Future of Machine LearningAn Interview with Daniel Situnayake Smartphone Apps for Android and iOSProgramming Apps Within a Single Development Environment From Life's ExperienceThe Value of a Technical Education 5G: How Infrastructure Shapes Our Society Practical ESP32 Multitasking (5)Task event notification HP 10811 OscillatorPeculiar Parts, the series LoRa GPS TrackerWith Open Hardware and Software Programming the Finite State Machinewith 8-bit PICs in Assembly and C

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Niemand twijfelt er aan dat buizenversterkers een opmerkelijk mooi geluid produceren. Ze klinken levendig, diep en doortekend; het klankbeeld is zeer aangenaam en dynamisch schijnen ze nagenoeg geen beperkingen te kennen.Via een systematisch theoretisch onderzoek gaat de auteur na waardoor deze fraaie eigenschappen ontstaan. Hij ontwikkelt nieuwe modellen voor versterkerbuizen en transformatoren, waardoor het mogelijk wordt om op voorhand, tijdens het ontwerp, al te bepalen wat de eigenschappen van de buizenversterker worden. De koppeling tussen eindbuizen en de uitgangstransformator wordt diepgaand gemodelleerd. Daarbij ontstaan nieuwe inzichten in een uitzonderlijk soort vervorming: de dynamische dempingsfactor vervorming (DDFD). Via rekenmodellen in het complexe domein worden vooral de eigenschappen in de grenzen van het hoorbare gebied (tussen 20 Hz en 20 kHz) onderzocht en ontstaan stabiliteitsvoorwaarden waar de versterker minstens aan moet voldoen. In versterkers wordt vaak tegenkoppeling toegepast, die uitgebreid wordt gemodelleerd en waarvan de gehoorsmatige gevolgen diepgaand worden besproken.Vervolgens wordt een fraaie selectie van bijzondere buizenversterkers besproken. Kenmerkend in dit boek is dat de auteur niet alleen technisch schrijft, maar verhalend laat zien dat het ontwikkelen van buizenversterkers ook ingrijpt in je dagelijkse leven; zelfs het nut van patenten wordt besproken. Samenvattend: nieuwe theorieën en oplossingen voor een perfecte audiokwaliteit met buizenversterkers. Zowel de zelfbouwer als diegene die kennis en inzicht wil verwerven zal dit boek met plezier ter hand nemen.

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Zelfbouw versterkers en luidsprekers Deze speciale uitgave staat vol met interessante bouwbeschrijvingen en achtergrondartikelen van internationaal gerenommeerde ontwerpers. Het gaat in alle gevallen om nieuwe, nog niet eerder gepubliceerde artikelen. Inhoudsopgave Buizenversterkers 30 Watt buizenversterker met variabele dempingsfactor 50 Watt super triode versterker 300 Watt buizen eindversterker Digibias: digitaal de ruststroom instellen en bewaken Luidsprekers Paper Hatt - klein maar fijn Origami M en C – compacte actieve subwoofer in twee smaken Meerweg open baffle systemen – basistheorie, ontwerp en meetmethode Moai – hightech uit Scandinavië OB3W – drieweg open-baffle dipool van formaat 1685a – compacte tweeweg vloerstaander ScanSpeak Vertigo – duizelingwekkend mooi driewegsysteem Halfgeleiderversterkers MinimA – minimalistische 120W klasse-B versterker Gebalanceerde voorversterker met actief wisselfilter RelaiXed – gebalanceerde voorversterker met relais

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The 8x10" iFixit Magnetic Project Mat catches and securely holds screws as you pull them out of a device. Now you can stop worrying about keeping track of all the loose screws and focus on your repair. Screws and small parts will remain right where you left them. For laptops with hundreds of screws, use the whole mat as a screw guide and keep careful location notes. Included is a pen — made by Staedtler, producer of top-of-the-line pens and pencils for artists and architects — that was specially designed for the Project Mat. The Lumocolor Correctable pen resists smears and won't wipe away with a casual brush of your hand. When your repair is complete, use the eraser tip or a dry cloth to wipe the ink away clean. Kenmerken Organize all your small parts while you work on a device. The dry-erase surface lets you keep notes and location sketches. Reduces reassembly time by up to 40% while preventing errors.

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The BB830T is a solderless (plug-in) transparent breadboard with 830 connection tie-points (i.e. 830 wire insertion holes). It has 4 power rails. Solderless breadboards are great for building and testing new circuits because parts can be easily inserted and removed. They are completely re-usable. The BB830T has a 630 tie-point IC-circuit area plus four 50 tie-point power rails. Specifications 830 tie points total: 630 tie-point IC-circuit area plus two 100 tie-point distribution strips providing 4 power rails. ABS plastic/transparent body with black printed legend. Color legend on distribution strips. Contacts are Phosphor Bronze with Plated Nickel Finish, rated for 50,000 insertions. Rated at 36 Volts, 2 Amps. Insertion Wire Size is 21 to 26 AWG, 0.016 to 0.028 inches diameter (0.4 to 0.7mm diameter). Peelable adhesive tape backing provided for attaching to a surface. Metal back plate provided.

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Most people are increasingly confronted with the applications of Artificial Intelligence (AI). Music or video ratings, navigation systems, shopping advice, etc. are based on methods that can be attributed to this field. The term Artificial Intelligence was coined in 1956 at an international conference known as the Dartmouth Summer Research Project. One basic approach was to model the functioning of the human brain and to construct advanced computer systems based on this. Soon it should be clear how the human mind works. Transferring it to a machine was considered only a small step. This notion proved to be a bit too optimistic. Nevertheless, the progress of modern AI, or rather its subspecialty called Machine Learning (ML), can no longer be denied. In this book, several different systems will be used to get to know the methods of machine learning in more detail. In addition to the PC, both the Raspberry Pi and the Maixduino will demonstrate their capabilities in the individual projects. In addition to applications such as object and facial recognition, practical systems such as bottle detectors, person counters, or a “talking eye” will also be created. The latter is capable of acoustically describing objects or faces that are detected automatically. For example, if a vehicle is in the field of view of the connected camera, the information 'I see a car!' is output via electronically generated speech. Such devices are highly interesting examples of how, for example, blind or severely visually impaired people can also benefit from AI systems.

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61 pagina's met de beste Raspberry Pi artikelen en projecten uit Elektor Magazine: Windows op de Raspberry Pi (1) Windows op de Raspberry Pi (2) Windows op de Raspberry Pi (3) Raspberry Pi wobbulator Raspberry-Pi-emulator Raspberry-Pi-voltmeter Raspberry Pi prototyping-board Visual Basic op de Raspberry Pi RPi meet energieverbruik Voor Linux-board en Raspberry Pi Maak uw eigen I2C-device voor de Raspberry Pi SD-kaart-upgrade voor RPi model 2 Mini-workshop GestIC & 3D-touchpad (2) Surfen op de golven van de RPi ATmega op het web (1) ATmega op het web (2)

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Diese Ausgabe steht allen GOLD- und GREEN-Mitgliedern auf der ElektorMagazine-Website zum Download bereit! Sie sind noch kein Mitglied? Hier klicken! STM32 Wireless Innovation Design Contest – Die Gewinner stehen fest In-Circuit LC-MeterEine Prototyp-Studie Das modulare DC-Leistungsmessgerät AmpVoltTeil 1: Platine zur Messung von Strömen bis 5 A und Spannungen bis 50 V embedded world 2024 Reparatur von elektronischen GerätenWerkzeuge, Techniken und Tipps Aller Anfang ...muss nicht schwer sein: Wir setzen die Verstärkertheorie fort! Ein einfacher DDS-SignalgeneratorDirekte Digitale Synthese in ihrer reinsten Form Sparkplug im ÜberblickEine Spezifikation für MQTT-Daten Bemerkenswerte BauteileZeile für Zeile: CRTCs Radargesteuerte BeleuchtungAutomatisches Treppenhauslicht mit Anwesenheitsdetektion Digitale Wasserwaage und aktive Stroboskop-Scheibe für PlattenspielerFeinabstimmung Ihres Plattenspielers mit nur einem Gerät Open Source und seine Bedeutung für die Elektronikindustrie (2) M12-Rundsteckverbinder mit A-KodierungErste Wahl für industrielle Anwendungen Arduino-MesslaborEin 8-in-1-Test- und Messgerät für das heimische Elektroniklabor Soundkarte als Betrag/Phase-Impedanz-AnalysatorFür Frequenzen von 100 Hz bis 90 kHz pH-Wert-Messung mit dem Arduino UNO R4Überprüfen Sie die Qualität Ihres Wassers Aus dem Leben gegriffenStartrampe für Pangpong-Popöchen Digitales Speicheroszilloskop FNIRSI 1014DGute Leistung für knappe Budgets 2024: Eine Odyssee in die KIWie man die Objekterkennung zum Laufen bringt 10-MHz-ReferenzgeneratorHochgenau, mit Verteiler und galvanischer Trennung Projekt-Update #2: Energiemessgerät mit ESP32Einige Weiterentwicklungen Projekt 2.0Korrekturen, Updates und Leserbriefe Ein Interview mit Eben Upton, Geschäftsführer von Raspberry PiDer Raspberry Pi 5 und darüber hinaus

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3rd Edition – Fully updated for Raspberry Pi 4 The Raspberry Pi is a very cheap but complete computer system that allows all sorts of electronics parts and extensions to be connected. This book addresses one of the strongest aspects of the Raspberry Pi: the ability to combine hands-on electronics and programming. Combine hands-on electronics and programming After a short introduction to the Raspberry Pi you proceed with installing the required software. The SD card that can be purchased in conjunction with this book contains everything to get started with the Raspberry Pi. At the side of the (optional) Windows PC, software is used which is free for downloading. The book continues with a concise introduction to the Linux operating system, after which you start programming in Bash, Python 3 and Javascript. Although the emphasis is on Python, the coverage is brief and to the point in all cases – just enabling you to grasp the essence of all projects and start adapting them to your requirements. All set, you can carry on with fun projects. The book is ideal for self-study No fewer than 45 exciting and compelling projects are discussed and elaborated in detail. From a flashing lights to driving an electromotor; from processing and generating analog signals to a lux meter and a temperature control. We also move to more complex projects like a motor speed controller, a web server with CGI, client-server applications and Xwindows programs. Each project has details of the way it got designed that way The process of reading, building, and programming not only provides insight into the Raspberry Pi, Python, and the electronic parts used, but also enables you to modify or extend the projects any way you like. Also, feel free to combine several projects into a larger design.

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As demand for solar panel installation has risen sharply, especially for installations larger than balcony power plants, the order books of solar companies are full. If you ask for a quote today, you may have to wait a while, if your request isn't simply postponed indefinitely. Another consequence of the solar boom is that some companies are charging very high prices for installations. Yet there is an obvious and radical solution to the problem of excessive prices: Do it yourself, as the English say. The price of materials is currently affordable, and it's the ideal time for those who do the work themselves. They couldn't save more. Add to this the satisfaction of doing something useful, both economically and ecologically, and the pleasure of building yourself. In this special issue, you'll find a wide selection of Elektor assemblies, from solar panel controllers to solar water heaters and solar panel orientation systems. The issue also contains practical information on solar panel installation and the technology behind them. Finally, there are a number of articles on the subject of balcony power plants, from how to install them to how to connect them to the Internet... Contents BASICS Dimensioning Photovoltaic Panel ArraysAn introduction to photovoltaic energy and the commonest techniques,followed by simplified calculation models and setup guidelines. Light Sensor TechnologyMeasuring daylight using LEDs. Solar Power Made SimpleSolar charging with and without a controller. Cable Cross-sections and Energy Losses in Solar SystemsKey considerations on the minimum values to respect for electricalcurrent in solar panel cabling. Solar ModulesEverything you always wanted to know about solar panels... Ideal Diode ControllerDiode Circuits with Low Power Dissipation. TIPS Tracking for Solar Modules zBot Solar/Battery Power Supply Solar Cell Array Charger with Regulator Solar Cell Voltage Regulator Solar-Powered Night Light Alternative Solar Battery Charger PROJECTS Energy LoggerMeasuring and Recording Power Consumption. Tiny Solar SupplySunlight In, 3.3 V Out. A Do-It-Yourself DTURead Data from Small Inverters by μC. Solar ChargerPortable energy for people on the move. Solar Thermal Energy RegulatorMaximum power point tracking explored. 2-amp Maximum Power Tracking ChargerSolar Power To The Max. Computer-driven HeliostatFollow the sun or the stars. Garden LightingUsing solar cells. Solar Panel Voltage Converter for IoT DevicesYes we CAN exploit indoor lighting. Travel ChargerFree power in the mountains. Solar Cell Battery Charger/MonitorWith protection against deep discharge. Solar-powered Battery ChargerPIC12C671 avoids overcharging and deep charging. Converters for Photovoltaic PanelsContributed by TME (Transfer MultisortElektronik). Solar Charging RegulatorFor panels up to 53 watts. Solar-Powered ChargerFor lead-acid batteries. CAN Bus + Arduino for Solar PV Cell MonitoringDetect and locate serviceable panels in large arrays. Balcony Power Plant 2.0The latest: solar panels, installation and inverters

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