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Für viele Audiopuristen sind Röhrenverstärker noch immer – oder wieder erneut – das Nonplusultra in der Audioverstärkertechnik überhaupt. Gutes Aussehen gepaart mit einem unübertroffenen Klangerlebnis – so die Meinung vieler Audiofreaks – sind hierfür ausschlaggebend. Tatsächlich erleben seit vielen Jahren die "totgesagten Röhren" eine für viele unerwartete Renaissance; das gilt im professionellen als auch im Hobbybereich. Die Kombination von klassischer Technik mit modernen Komponenten haben zur Wiederbelebung der Röhrenverstärker beigetragen; so auch der durch den Autor entwickelte "Ringkern-Ausgangstransformator". Über das Wie und Warum solcher Ausgangsübertrager gibt das Buch ausreichend Auskunft. Dazu zählen Begriffserläuterungen und auch die genaue technische Funktionsbeschreibung in Zusammenarbeit zwischen Röhren, Ausgangstransformator und Lautsprecher. Schließlich folgen noch komplette Baubeschreibungen: vom einfachen 10-W- bis zum Highend-100-W-Röhrenverstärker. Dieses E-Buch beschreibt innovative Lösungen für eine perfekte Audioqualität. Sowohl der Pragmatiker, der sein Gerät selbst baut, wie auch der Theoretiker, den die Komplexität von Transformatoren, Röhrenverstärkern und die Verarbeitung von Audiosignalen interessiert, finden Gefallen an diesem Buch.

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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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Le téléchargement intégral de ce numéro est disponible pour nos membres GOLD et GREEN sur le site Elektor Magazine ! Pas encore membre ? Cliquez ici. charge électronique pour les tests à haute intensitéde la nécessité à l'innovation suppresseur de voixcircuit pour un karaoké instantané sélecteur audio A/B avec réglage de gaincommuter de l'entrée micro à l'entrée ligne optimiser la rechrage du LIR2032prenez soin de vos piles bouton la détection tactile en toute simplicitéun guide de fabrication pour n'importe quel microcontrôleur interrupteur universel à télécommandeune nouvelle vie pour les vieilles télécommandes une boite à meuh avec un microcontrôleurproduire des sons amusants à l'aide d'un microcontrôleur interface de batterie externe USB alimenter les appareils à faible consommation avec des batteries externesune Solution pour les maintenir actives mini-ampli audio de classe A avec sortie en courantpiloter les haut-parleurs en courant au lieu de tension module pseudo-symétriqueCMRR élevé avec des liaisons audio asymétriques chargeur automatique d'accu Ni-MHrechargez toutes vos batteries simultanément ! protection pour alimentation électrique basée sur un thyristor lecteur d'empreintes digitalesdispositif utile d'identification convertisseur de puissance DC-DC 3Aaméliorer vos sources de tension fixes innovations de la plateforme Arduino Project Hubnouveaux projets de la communauté contrôle à distance du chauffe-eaudétection de tension et de courant pour les lignes à courant alternatif atténuateurs pour signaux audio (1)sélection par cavaliers cure de jouvence pour votre vieux chargeur (1)ne le jetez pas, modernisez-le ! une carte pour « The Blue »circuit imprimé pour le potentiomètre motorisé d'Alps référence 50 Hz à partir d'une tension secteur 60 Hzconversion de 50 Hz à 60 Hz isolateurs numériquesréalisation facile de l’isolation galvanique amplificateur mono Hi-Fi compact de 12 Wpetit mais puissant générateur de rampe LM386 générateur triphaséavec Raspberry Pi Pico ouverture de porte pour les personnes ayant des talents musicaux classique d’Elektor : synthétiseur Surfgénérateur d’ambiance océanique relaxante (de Chhhh à Zzzz) cure de jouvence pour votre vieux chargeur (2)ne le jetez pas, modernisez-le ! surveillance du courant d'une lampe avec Raspberry Pi Pico télégraphie infrarouge Fnirsi SWM-10appareil portable de soudage par point intelligent pour réparer vos packs d’accumulateur Codec audio stéréo pour ESP32 et Ciela mesure audio : pas de panique techniques de soudure à l’étain faites-le correctement dès maintenant ! atténuateurs pour signaux audio (2) sélection par relais alimentation USB-CDrawing Power from USB-C Power Adapters trois circuits avec deux et trois puces 4017 comptez sur les 4017 composants actifs - la diode un minuteur pour des délais ultra-Longs réglez-le et oubliez-le ! Jack In & Jack Out maillon d’E/S pour chaînes audio alimenter un ESP32 à partir d'une seule cellule Li-ion Hexadoku

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Mastering the Language and the Development Platform Many people would like to learn Java but getting started is not easy since programming with Java requires at least two things: mastering the programming language and the development environment. With the help of many examples, this book shows how the language is structured. In addition, it employs the Eclipse development environment as an example of a powerful tool to teach developing Java programs. In Basics, the first part of the book, you acquire your Java and Eclipse basic knowledge. This part lays the programming foundations, gives you an overview of Java technology, and shows you what is special about object-oriented programming. In the second part called Java Language, everything revolves around the subtleties of the Java language and this is where the first small Java applications are created, aided by a fine blend of the knowledge part and practical exercises. Java Technology is both the name and the focus of the third part which also introduces you to the rules to observe when programming, what class libraries are and what advantages they have. In addition, you will learn how to test programs, what algorithms are, and how to program them. The fourth part, Java Projects, enables you to apply all the previous elements in an application with a graphical user interface. The project shows how to develop a larger application piece by piece with the Eclipse development environment. The Appendix concludes with a section on frequent errors that can occur when working with Eclipse, and a Glossary.

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Elektor GREEN and GOLD members can download their digital edition here. Not a member yet? Click here. ESP32 Audio Transceiver Board (Part 2)Wireless Audio Transmission Inductive AM TransmitterUses Pico’s PIO in an Arduino Sketch Navigating Wireless ProtocolsA Technical Guide Satellite Tracking Using LoRaThe TinyGS Network Bringing Space Data to Earth 4G-Compatible SMS Remote ControlRemotely Control Your Equipment High-Speed ProbeHigh-Impedance Inputs for Signals up to 200 MHz From Life’s ExperienceKafka KrakenSDR Performance Tests with the RP2350Is an Upgrade from Raspberry Pi Pico 1 to Pico 2 Worthwhile? Contact-Free E-Field Measurements (2)A Laser Vibrometer for Assessing the Membrane's Vibrations Crystals and OscillatorsImproving Crystal Accuracy Through Capacitor Selection Starting Out in ElectronicsSpecial Audio ICs Getting Started with Coding a DIY Project SPECTRAN® V6 MobileModular, Configurable Real-Time Spectrum Analyzer for Reliable Measurements Across All Frequency Ranges The Future of AI Is Forged in SiliconAn Interview with Anastasiia Nosova Autonomous Sensor Node v2.0 (System Architecture)Solar-Powered Sensing Platform with Integrated GPS, LoRaWAN, and More Precise PositioningBluetooth Channel Sounding Tested Powering the Future of Wireless CommunicationBTRY’s Ultra-Thin Solid-State Batteries Test-Driven Development in Firmware Writing Phone-Controlled Model CarWi-Fi + ESP32 + Smartphone = Remote Control 2025: An AI OdysseyAI Reasoning Models: The Chain-of-Thought Revolution Solar Charge Controller with MPP Tracking (3)Software and Commissioning Raspberry Pi Zero Web Streaming CameraUsing the ZeroTier VPN

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Elektor Mars/Avril 2020 (PDF)

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Elektor GREEN en GOLD leden kunnen deze uitgave hier downloaden. Nog geen lid? Klik hier om een lidmaatschap af te sluiten. Relio v1.0 – Aanwezigheidsdetectie en afstandsbedieningEen smart controller met Matter-functionaliteit voor AC-apparaten Betere printplaten ontwerpenEen praktische gids voor professionals en makers KiCad 9De belangrijkste nieuwe en verbeterde functies Precisie pico-ampèremeter (1)Met curvetracer-functionaliteit tot in het pA-bereik! Kerstster 2025soldeer de sterren van de hemel! 100mV-doorgangstester Wie verlegt de grenzen van de Europese elektronica?Bedrijven om in het oog te houden Productronica 2025: Wat is er nieuw in de ontwikkeling en productie van elektronica Automatisering om reshoring van productie, invoerheffingen en tekorten aan arbeidskrachten aan te pakken Meer dan toekomstbestendigCirculariteit in elektronica Passieve componentenVerliesarme inductoren voor hoogrendements DC/DC-converters Hoe desktopmachines de printplaatproductie toegankelijker maken Alle begin......heeft voeding nodig Uit het leven gegrepenKnopjeskoorts Soldeertechniek in 2025Praktische soldeertips rechtstreeks van de werkbank SimulIDEEen alles-in-één tool voor circuit-prototyping 2025: Een AI OdysseyVan autocomplete tot collega Wordy Christmas TreeEen feestelijk elektronica-project met een taalkundig tintje Err-lectronicsCorrecties, updates en lezersbrieven Analoge pipeline-vervormingEen fraai audio-effect voor gitaren en andere instrumenten ESP32 audiotransceiver-board (deel 3)Stereotransmissie en dual-radio

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Elektor GREEN and GOLD members can download their digital edition here. Not a member yet? Click here. An Autonomous Sensor NodeLoRa-Based Data Transmission and Power by Solar Cells Elektor eXpansion Board v1.0For ESP32-S3 and other XIAO controller boards Model Railroad with CameraInstalling an ESP32 CAM Module Broadband Magnetic Antenna for Long WaveMultiple Channels Without Tuning TensorFlow Lite on Small MicrocontrollersA (Very) Beginner’s Point of View A Hub for RS-422 and RS-485 DevicesWire Your Bus Like a Star RF ProbeWith LED Bar Graph Starting Out in Electronics……Reviews More Opamp Circuits Open VarioThe Open-Source Multifunction Variometer for Paragliding From Life’s ExperienceAbout Taking Things for Granted AI-Based Water Meter Reading (Part 2)Get Your Old Meter Onto the IoT! ML-Based Pest DetectionSmart Agriculture Device With IoT Connectivity Why Anybus CompactCom Is the Ideal Choice for Embedded Industrial Communication IQRF Communication StandardReliability for Lossy, Low-Rate Wireless Mesh Networks How to Build a Smart Agricultural RobotEssential Technical Considerations and Challenges Audio Notch Filter with Adjustable FrequencyUniversal Solution for Suppressing Frequencies in Audio Applications The LeoINAGPS SystemGets Useful Insights on Your Electric Vehicle Solar-Powered LoRa NodeA Modular, Compact, and Versatile IoT Solution AWS for Arduino and Co. (2)Sending Data Using AWS IoT ExpressLink Err-lectronicsCorrections, Updates, and Readers’ Letters 2024: An AI OdysseyDesktop Versus Embedded Accelerators: A Look at Some Options ESP32 Range ExtenderA Simple Antenna Modification

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Elektor GREEN en GOLD leden kunnen deze uitgave hier downloaden. Nog geen lid? Klik hier om een lidmaatschap af te sluiten. ESP32 Audio Transceiver Board (Deel 2)Draadloze audio-overdracht Inductieve AM-zenderGebruikt Pico's PIO in een Arduino-sketch Navigeren door draadloze protocollen navigerenEen technische gids Satelliettracking met behulp van LoRaHet TinyGS-netwerk brengt gegevens uit de ruimte naar de aarde. 4G-Compatibele SMS afstandsbedieningBedien je apparatuur op afstand Hogesnelheids-probeIngangen met hoge impedantie voor signalen tot 200 MHz Uit het leven gegrepenKafka KrakenSDR Prestatietests met de RP2350Is een upgrade van Raspberry Pi Pico 1 naar versie 2 de moeite waard? Contactloze E-veldmetingen (2)Een laservibrometer voor het beoordelen van de trillingen van het membraan Kristallen en oscillatorenVerbetering van de kristalnauwkeurigheid door gerichte keuze van condensatoren Alle begin......gaat audio! Zelf firmware coderen voor embedded projecten SPECTRAN® V6 MobileModulaire, configureerbare realtime-spectrumanalyzer voor betrouwbare metingen over alle frequentiebereiken De toekomst van AI wordt gesmeed in siliciumEen interview met Anastasiia Nosova Autonome Sensor-Node v2.0 (Systeemarchitectuur)Zonne-energieplatform met geïntegreerde GPS, LoRaWAN en meer Precieze positioneringBluetooth channel sounding getest Testgestuurd ontwikkelen bij het schrijven van firmware Telefoon gestuurde modelautoWi-Fi + ESP32 + Smartphone = Afstandsbediening 2025: Een AI-odysseeAI-redeneermodellen: De gedachtegang-revolutie Zonne-laadregelaar met MPP-tracking (3)Software en Inbedrijfstelling Raspberry Pi Zero Web Streaming CameraDe ZeroTier VPN gebruiken Beste soldeerder van de Beneluxvakmanschap in de schijnwerpers Seminaroverzicht Electronics & ApplicationsLeer, ontdek en netwerk op E&A 2025 Eurocircuits at E&A 2025 E&A gadget 2025: racen over de beursvloer met slimme printplaat op wielenVijf vragen aan Casper van Doorne, ontwerper van de beursgadget Beursgadget E&A bekendontwerp en bestuur je eigen raceauto Vakbeurs E&A is het elektronicaparadijs van de Benelux“Techneuten blijven kinderen” Rohde & SchwarzPioneering Innovation in Test & Measurement Diederik Jekel opent Electronics & Applications

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Pull Down Lever For Highest Score! This Elektor Circuit Classic from 1984 shows a playful application of CMOS 400x series logic ICs in combination with LEDs, a highly popular combination at the time. The project imitates a spinning-digit type slot machine. The Game To play the game, first agree on the number of rounds. Player 1 actuates the switch lever as long as desired and releases it. The LEDs then show the score which is the sum of the 50-20-10-5 digits lit up. If the Play Again! LED lights, Player 1 has another, “free” round. If not, it’s Player 2’s turn. The players keep tab of their scores, and the highest score wins. Features LEDs Indicate Score Multi-Player and Play Again! Elektor Heritage Circuit Symbols Tried & Tested by Elektor Labs Educational & Geeky Project Through-Hole Parts Only Included Printed Circuit Board All Components Wooden Stand Bill of Materials Resistors (5%, 250 mW) R1,R2,R3,R4 = 100kΩ R5,R6,R7,R8,R9,R10 = 1kΩ Capacitors C1 = 4.7nF, 10%, 50V, 5mm C2 = 4.7μF, 10%, 63V, axial C3,C4 = 100nF, 10 %, 50V, ceramic X7R, 5mm Semiconductors LED1-LED6 = red, 5mm (T1 3/4) IC1 = 74HC4024 IC2 = 74HC132 Miscellaneous S1 = switch, toggle, 21mm lever, SPDT, momentary S2 = switch, tactile, 24V, 50mA, 6x6mm S3 = switch, slide, SPDT IC1,IC2 = IC socket, DIP14 BT1 = PCB-mount CR2032 battery retainer clip Desktop Stand PCB 230098-1 Not included: BT1 = CR2032 coin cell battery

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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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Diese Ausgabe steht allen GOLD- und GREEN-Mitgliedern auf der ElektorMagazine-Website zum Download bereit! Sie sind noch kein Mitglied? Hier klicken! Für Augen und Ohren Videoausgabe mit MikrocontrollernTeil 1: Composite Video electronica 2022Neues von der Weltleitmesse ESP32-KameraSo einfach, dass sie nicht einmal WLAN braucht ATX-Netzteil für Raspberry Pi 32-?-KopfhörerverstärkerEinfache, aber hochqualitative 3-Chip-Lösung SDR-FunkuhrenFünf Zeitzeichen, sechs Anzeigen Aller Anfang ...muss nicht schwer sein: Spezielle Dioden Aus dem Leben gegriffenÜber die Qualität der Dinge Reverse-Engineering eines LED-Displays mit Bluetooth Low EnergyWie man ein BLE-Gerät mit einem Python-Skript steuert MakePython ESP32 Development KitAlles in einer Box THD-Messung mit Oszilloskop und FFTDen Klirrfaktor einfach berechnen Allsehende MaschinenDie Technologie hinter modernen industriellen Bildverarbeitungssystemen Infografik Die Entwicklung der Sprach- und Audiosteuerung für elektronische Geräte WEEF 2022 im Rückblick Im Rückblick: FFWD electronica 2022Innovatoren beeindrucken weiterhin! The TubeEin Röhrenverstärker der anderen Art Biomaterialien in der Elektronik: Bereit oder nicht? Opera-Cake-Antennenumschalter für HackRF OneSchließen Sie bis zu acht Antennen an Ihr SDR an Technik mit Arduino und mehrEin Interview mit Autor Ashwin Pajankar LiDAR-PräzisionsmetermaßMisst bis zu zwölf Meter Audio mit dem ESP32Das Framework ESP-ADF in der Praxis Elektor-Leistungsverstärker-Bausatz Fortissimo-100 Licht für Klangeffekte nutzenLDR-basiertes spannungsgesteuertes 24 dB/Okt.-Synthesizer-Filter Hochleistungsverstärker GigantDer Lauteste von allen!! Betreten für Unbefugte verboten!Ein volumetrisches Display Made in Canada Projekt 2.0Korrekturen, Updates und Leserbriefe Hexadoku

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