Zoekresultaten voor "iot or buch"

Cette compilation comprend des articles intégrés de l'actuel Elektor entre juillet 2012 et novembre 2014. Les documents suivants sont inclus dans le numéro de document (PDF) avec la fonction de navigation disponible et les articles sont intéressants.

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Arduinonext is an initiative powered by an electronics and microcontrollers specialist team aiming to help all those who are entering in the technology world, using the well-known Arduino platform to take the next step in electronics. We strive to bring you the necessary knowledge and experience for developing your own electronics applications; interacting with environment; measuring physical parameters; processing them and performing the necessary control actions. This is the first title in the 'Hands-On' series in which Arduino platform co-founder, David Cuartielles, introduces board programming, and demonstrates the making of an 8-bit Sound Generator.

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Vanaf nu kunt u uw Arduino boards aansluiten met de officiële Arduino USB kabel. Met deze data USB kabel kan uw Arduino board eenvoudig worden verbonden met een door u gekozen apparaat, via een USB-C naar een USB-C met een USB-A adapter. De Arduino USB kabel heeft een nylon gevlochten mantel in de typische Arduino kleuren wit en groenblauw. De connectoren hebben een aluminium omhulsel dat uw kabel beschermt tegen schade en er meteen ook cool uitziet. Lengte: 100 cm Aluminium omhulsel met logo Nylon gevlochten mantel in wit en groenblauw

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Elektor 03-04/2021 als PDF (DE)

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Reinigungsroboter selbstgebaut (E-book)

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This book focuses more on practical aspects than on theory, and it has an contemplative nature, as though the author were viewing amplifiers from above. Knowledge elements are integrated and placed in the context of a broad overview. Even now tube amplifiers still sound great perhaps better than ever before. In part that is because we now have access to modern components such as toroidal output transformers, extremely high-quality resistors and capacitors, and many sorts of wire with good acoustic properties. Modern audio sources, such as CD players, and the latest top-end loudspeakers also enable us to appreciate how well tube amplifiers reproduce music even better than before. This new book from Menno van der Veen looks at tube amplifiers from more than just a theoretical perspective. It focuses primarily on the design phase, where decisions must be taken with regard to the purpose and requirements of the amplifier, and it addresses the following questions: How do these aspects relate to subjective and objective criteria? Which circuits sound the best, and why? If you want to develop and market an amplifier, what problems should you expect? What are the significance and meaning of measurements? Are they still meaningful, or have they lost their relevance? Thanks to the enormous processing power of computers, we can now measure more details than ever before. How can these new methods be applied to tube amplifiers? Previously it was sufficient to measure the frequency range, power and distortion of an amplifier in order to characterize the amplifier. Are these measurements still sufficient, or should we start measuring according to how we hear, using real music signals instead of waveforms from signal generators? The author sketches a future where amplifier measurements that conform to our sense of hearing enable us to arrive at new insights. This book focuses more on practical aspects than on theory, and it has an contemplative nature, as though the author were viewing amplifiers from above. Knowledge elements are integrated and placed in the context of a broad overview.

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De Siglent SSA3015X Plus spectrum analyzer is een krachtig en flexibel hulpmiddel voor RF signaal- en netwerkanalyse. Met een frequentiebereik van 1,5 GHz levert de analyzer betrouwbare automatische metingen en meerdere werkingsmodi: spectrum analyzer als basisfunctie, en optionele functies als RF-vermogensmeting, vectorsignaal-modulatieanalyse, reflectiemeting en EMI-test.Toepassingen zijn onder meer monitoring/evaluatie van zendsignalen, metingen op locatie, S-parameter meting, analoge/digitale modulatie analyse, EMI pre-compliance test, onderzoek en ontwikkeling, onderwijs, productie en onderhoud.Kenmerken Spectrum analyzer frequentiebereik van 9 kHz tot 1,5 GHz –156 dBm/Hz Displayed Average Noise Level (typ.) –99 dBc/Hz. @ 10 kHz Offset Phase Noise (1 GHz, typ.) Level Measurement Uncertainty< 1,2 dB (typ.) 1 Hz minimale Resolution Bandwidth (RBW) Voorversterker (standaard) Tracking generator (inbegrepen, gratis) Analoge en digitale signaalmodulatie-analyse modus (optioneel) Reflectie meetkit (optioneel) EMI filter en quasi-peak detector kit (optioneel) Advanced Measurement Kit (optioneel) 10,1-inch multi-touch scherm, muis en toetsenbord ondersteund Webbrowser afstandsbediening op pc en mobiele terminals, en bediening via files Specificaties SSA3015X Plus SSA3021X Plus SSA3032X Plus SSA3075X Plus Frequentiebereik 9 kHz ~ 1,5 GHz 9 kHz ~ 2,1 GHz 9 kHz ~ 3,2 GHz 9 kHz ~ 7,5 GHz Resolutie bandbreedte 1 Hz ~ 1 MHz 1 Hz ~ 1 MHz 1 Hz ~ 1 MHz 1 Hz ~ 3 MHz Phase Noise <–99 dBc/Hz <–98 dBc/Hz <–98 dBc/Hz <–98 dBc/Hz Total Amplitude Accuracy < 1,2 dB < 0,7 dB < 0,7 dB < 0,7 dB Display Average Noise Level –156 dBm/Hz –161 dBm/Hz –161 dBm/Hz –165 dBm/Hz Inbegrepen Siglent SSA3015X Plus spectrum analyzer USB kabel Netsnoer Quick Start gids Downloads Datasheet Manual Documentation Firmware

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Nobody has any doubt that valve amplifiers produce a remarkably beautiful sound. They have a lively, deep, clear, and expressive sound, and dynamically they do not appear to have any limitations. The author investigates, in a systematic theoretical approach, the reasons for these beautiful properties. He develops new models for power valves and transformers, thus enabling the designer to determine the properties of the amplifier during the design process. Mathematical models for the coupling of power valve(s) and output transformer are provided. These will generate new insights in a special kind of distortion: the dynamic damping factor distortion (DDFD). With mathematical models in the complex domain, especially the properties at the limits of our hearing range (from 20 Hz to 20 kHz) are investigated and the minimal stability criteria for the amplifier are formulated. The often-applied negative feedback in amplifiers is extensively modelled and discussed in relation to our hearing appreciating. And after all this theory a fine selection of special amplifiers is presented and discussed. You will notice in this book that the author not only writes about amplifier technique, but tells about the way the development of valve amplifiers can have an influence on your daily life; even the usefulness of patents is discussed. Summarizing: new theories and solutions for perfect audio with valve amplifiers. Not only the professional and the DIY-er but everyone who wants to understand valve amplifiers will read this book with much pleasure.

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This 233-page e-book is packed with Arduino ideas, explanations, tips, diagrams, programs, PCB layouts, and more – enough to provide days of informative, inspiring, and stimulating reading pleasure! The PDF document includes a table of contents with links to the individual projects, allowing you to easily navigate to the sections you’re most interested in. This way, you can quickly and effortlessly switch between projects and find exactly what you’re looking for.

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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. alimentation de labo à très faible bruit (1)Une source silencieuse pour les circuits sensibles STM32 Edge AI Contest 2025 : les gagnants les batteries aujourd’huiTechnologies et différences entre les batteries au lithium charge électronique réglableCharge CC statique et dynamique convertisseur abaisseur de 48 V à 5 Vune réalisation pratique nœud de capteurs autonome v2.0Partie 2 : validation matérielle et optimisations énergétiques varistancesDrôles de composants, la série compteur graphique de fréquence du réseauSurveillance de la qualité du réseau démarrer en électronique…Touche à sa fin ferrites CMS à charge de courant de crêteplus résistantes aux pics de courant Elektor Live! Expert Day 2025 la récupération d’énergie propulse l’IoT et l’IIoT vers une nouvelle èreLa récupération d’énergie affranchit l’IoT de la dépendance au réseau Fnirsi DPS-150Alimentation portable compacte et convertisseur source d’alimentation USB-C réglableTransformez votre chargeur USB-C en alimentation réglable chargeur simple et testeur de capacitéAvec deux modules économiques « prêts à l’emploi » détecteur de couleurs intelligent avec synthèse vocale et lecture audio basées sur l’IA PbMonitor v2.0Présentation du système de surveillance de batteries mis à jour un ventilateur pour la mini-plaque de refusionDes modifications astucieuses pour des résultats optimisés sur le vifL’excès d’indulgence projet 2.0Corrections, mises à jour et courriel des lecteurs 2026 : une odyssée de l’IAQuand les modèles commencent à orienter le matériel picoampèremètre de précision (2)Assemblage, étalonnage et test alimentation sans fil des appareilsavec technologie inductive conduite autonome basée sur l’IALe Self Driving Challenge 2024 du RDW carte son comme générateur de signauxUn PC utilisé comme émetteur de test DCF77

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Menno van der Veen is well known for his research publications on tube amplifiers used in audio systems. In this book he describes one of his research projects which focuses on the question of whether full compensation for distortion in tubes and output transformers is possible. In the past, a variety of techniques have been developed. One of them has largely been forgotten: trans-conductance, which means converting current into voltage or voltage into current. Menno van der Veen has breathed new life into this technique with his research project titled “Trans”. This book discusses all aspects of this method and discusses its pitfalls. These pitfalls are addressed one by one. The end result is a set of stringent requirements for Trans amplifiers. Armed with these requirements, Menno then develops new Trans amplifiers, starting with Transie 1 and Transie 2. These DC-coupled, single-ended tube amplifiers have unusually good characteristics and are suitable for hobbyist construction. Next the Trans principle is applied to amplifiers with higher output power. A trial-and-error process ultimately leads to the Vanderveen Trans 30 amplifier, which optimizes the features of Trans. The characteristics of this amplifier are so special and unique that Menno believes he has struck gold. To ensure that variations in tube characteristics cannot interfere with optimal Trans behavior, Menno makes use of simulations and comparison with other amplifier types. This book reads like an adventure story, but it is much more – it is an account of solid research into new ways to achieve optimal audio reproduction.

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De Siglent SSA3015X Plus spectrum analyzer is een krachtig en flexibel hulpmiddel voor RF signaal- en netwerkanalyse. Met een frequentiebereik van 7,5 GHz levert de analyzer betrouwbare automatische metingen en meerdere werkingsmodi: spectrum analyzer als basisfunctie, en optionele functies als RF-vermogensmeting, vectorsignaal-modulatieanalyse, reflectiemeting en EMI-test.Toepassingen zijn onder meer monitoring/evaluatie van zendsignalen, metingen op locatie, S-parameter meting, analoge/digitale modulatie analyse, EMI pre-compliance test, onderzoek en ontwikkeling, onderwijs, productie en onderhoud.Kenmerken Spectrum analyzer frequentiebereik van 9 kHz tot 7,5 GHz –165 dBm/Hz Displayed Average Noise Level (typ.) –98 dBc/Hz. @ 10 kHz Offset Phase Noise (1 GHz, typ.) Level Measurement Uncertainty< 0,7 dB (typ.) 1 Hz minimale Resolution Bandwidth (RBW) Voorversterker (standaard) Tracking generator (inbegrepen, gratis) Analoge en digitale signaalmodulatie-analyse modus (optioneel) Reflectie meetkit (optioneel) EMI filter en quasi-peak detector kit (optioneel) Advanced Measurement Kit (optioneel) 10,1-inch multi-touch scherm, muis en toetsenbord ondersteund Webbrowser afstandsbediening op pc en mobiele terminals, en bediening via files Specificaties SSA3015X Plus SSA3021X Plus SSA3032X Plus SSA3075X Plus Frequentiebereik 9 kHz ~ 1,5 GHz 9 kHz ~ 2,1 GHz 9 kHz ~ 3,2 GHz 9 kHz ~ 7,5 GHz Resolutie bandbreedte 1 Hz ~ 1 MHz 1 Hz ~ 1 MHz 1 Hz ~ 1 MHz 1 Hz ~ 3 MHz Phase Noise <–99 dBc/Hz <–98 dBc/Hz <–98 dBc/Hz <–98 dBc/Hz Total Amplitude Accuracy < 1,2 dB < 0,7 dB < 0,7 dB < 0,7 dB Display Average Noise Level –156 dBm/Hz –161 dBm/Hz –161 dBm/Hz –165 dBm/Hz Inbegrepen Siglent SSA3075X Plus spectrum analyzer USB kabel Netsnoer Quick Start gids Downloads Datasheet Manual Documentation Firmware

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