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The FNIRSI FNB58 USB tester (with Bluetooth) is a comprehensive and very accurate USB voltage and current meter. It features a 2.0-inch full-color HD TFT display, built-in USB-A, micro USB and USB-C interface. With this device you can measure the power supply or power consumption of products or the charging power of cell phones and power supplies. You can also determine the fast charging protocol of chargers. Features USB-A and USB-C interface 2.0" HD display Data at a glance Wide compatibility Ultra-precise data detection Play with fast charging technology Automatic protocol detection (PD2.0, 3.0, 3.1, PPS, QC2.0, 3.0, FCP, SCP, AFC, PE, DASH VOOC, SuperVOOC and more) Simple user interface, easy to operate 4 function curve displays (real-time voltage and current curve, offline curve recording, D+/D- voltage curve, high-speed power supply ripple measurement) Cable detection 10 groups of energy recording battery capacity calculation PC connectivity for data logging and firmware updates Bluetooth app for Android devices Specifications Voltage range 4-28 V Current range 0-7 A Power range 0-120 W Load equivalent internal resistance 0-9999.9 Ω D+/D- voltage 0-3.3 V Capacity 0-9999.99 Ah Power consumption 0-9999.99 Wh Cable resistance 0-9999.9 Ω Interfaces micro USB, USB-A, USB-C Dimensions 42 x 13 x 82 mm Downloads Manual Firmware V0.68

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The Basics, New Ideas & Applications Build digital electronics from the ground up—and take it all the way to practical circuits you can use. This book guides you through the core principles of digital technology with a strongly hands-on approach. You’ll begin with the essentials: signals, devices for working with them, and what "logic 0" and "logic 1" mean in real hardware. Simple demonstration setups made from easy-to-find parts (LEDs, diodes, resistors, switches) help you see how logic behaves, making the theory click before you move on. From there, you’ll explore a wide range of logic elements and how they’re implemented, including classic logic families such as TTL and CMOS. The fundamentals section covers the building blocks of digital systems: flip-flops, Schmitt triggers, registers, counters and dividers, encoders/ decoders, multiplexers/demultiplexers, plus A/D and D/A conversion and timing circuits. Next, the book invites you into "new ideas" in digital electronics—universal logic elements, unconventional approaches (including thyristor-based and fractional logic), and creative logic functions that can inspire original designs. Finally, a large, well-organized collection of application circuits turns knowledge into projects: electronic switches and selectors, pulse generators, PWM regulators, frequency multipliers/dividers, phase shifters, and digital filters. Study it deeply, and you’ll gain not only understanding—but the ability to design and debug digital circuits independently.

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Inhalt 30 Watt Röhrenverstärker mit variablem Dämpfungsfaktor 50 Watt Super Trioden Verstärker 300 Watt Röhrenendstufe Digibias: Digitale Ruhestrom-Einstellung und -Überwachung Paper Hatt: Klein, aber fein Origami M und C: Ein Subwoofer-Entwurf für zwei Anwendungsbereiche ScanSpeak Vertigo: Kompaktes Dreiwegesystem Intertrechnik Elip1: Elegante 2-Wege-Kombi zum kleinen Preis Visoton Clou: Prinzip Acoustical Tripath Pro HiFi Fréjus: Für Freunde der gehobenen Lautstärke ASE Someo: Kompakte Koaxial-Kombination ASE Someo-Sub: Aktiver Dipol-Woofer mit Linear Array Transducer MinimA: Ein minimalistischer 120 W Klasse-B-Verstärker Symmetrischer Vorverstärker/Aktives Filter: Ein Standardrezept für verschiedene Anwendungen RelaiXed: Symmetrischer Vorverstärker mit Relais

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Zelfbouw versterkers en luidsprekers Ook deze vijfde Audio Special staat weer vol met interessante bouwbeschrijvingen en achtergrondartikelen van internationaal gerenommeerde ontwerpers. Ook dit jaar weer de inmiddels bekende mix van buizenversterkers en luidsprekers, zodat er voor iedere zelfbouwer ongetwijfeld iets interessants te lezen of te bouwen valt. Het gaat in alle gevallen om nieuwe, nog niet eerder gepubliceerde artikelen. Inhoud Versterkers Classic Three voorversterker Lijnvoorversterker met 6C33 De Dirigent – buizenvoorversterker met actief scheidingsfilter Single ended KR300B stereo eindversterker 1 Watt gitaarversterker – voor huiskamer Single ended 211 triode versterker – met interstage trafo Dieper kijken in de uitgangstransformator Prelude voorversterker – minimalisme in optima forma Klik aan, klik uit schakelaar – een netschakelaar met legio toepassingen Luidsprekers Scheidingsfilters voor luidsprekerboxen – meer valkuilen dan je lief is Morel Elite 420 – actieve tweeweg boekenplank luidspreker All back – een verrassend veelzijdige compacte TL HATT-SE MkII Micro Monitor – kleine luidspreker met pit Silverado – een d’Appolito met pit Nebular Monitor – een compacte luidspreker met een groots geluid LBVS – zelfbouwklassieker van eigen bodem Solo 201 – er is maar één weg!

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Valve Amplifiers are regarded by many to be the ne plus ultra when it comes to processing audio signals. The combination of classical technology and modern components has resulted in a revival of the valve amplifier. The use of toraidal-core output transformers, developed by the author over the past 15 years, has contributed to this revival. The most remarkable features of these transformers are their extremely wide frequency ranges and their very low levels of linear and nonlinear distortion. This book explains the whys and wherefores of toroidal output transformers at various technical levels, starting with elementary concepts and culminating in complete mathematical descriptions. In all of this, the interactions of the output valves, transformer and loudspeaker form the central theme. Next come the practical aspects. The schematic diagram of a valve amplifier often appears to be very simple at first glance, but anyone who has built a modern valve amplifier knows that a lot of critical details are hidden behind this apparent simplicity. These are discussed extensively, in connection with designs for amplifiers with output powers ranging from 10 to 100 watts. Finally, the author gives some attention to a number of special valve amplifiers, and to the theory and practice of negative feedback. In summary, this book offers innovative solutions for achieving perfect audio quality. Do-it-yourself builders, as well as persons who want to gain a deeper technical understanding of the complex world of audio transformers, valve amplifiers and audio signal processing, will find this book a rich and useful source of information.

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The Siglent SDS822X HD digital storage oscilloscope is based on 2 GSa/s, 12-bit Analog-Digital Converters and front ends with excellent noise floor performance. With a 200 MHz bandwidth, and a maximum record length of 100 Mpts, and the capability to analyze 2 analog channels alongside 16 digital channels, the SDS822X HD is perfectly suited for mixed signal analysis. Features 12-bit High Resolution 12-bit Analog-Digital Convertors with sample rate up to 2 GSa/s Front ends with 70 μVrms noise floor @ 200 MHz bandwidth 2/4 analog channels, up to 700 MHz bandwidth SPO technology Waveform capture rate up to 120,000 wfm/s (normal mode), and 500,000 wfm/s (sequence mode) Supports 256-level intensity grading and color temperature display modes. Up to 50 Mpts record length Digital trigger system Intelligent trigger: Edge, Slope, Pulse width, Window, Runt, Interval, Dropout, Pattern, Video (HDTV supported), Qualified, Nth edge, Delay, Setup/Hold time. Serial bus triggering and decoder, supports protocols I²C, SPI, UART, CAN, LIN. Segmented acquisition (Sequence) mode, dividing the maximum record length into multiple segments (up to 80,000), according to trigger conditions set by the user, with a very small dead time between segments to capture the qualifying event. History waveform record (History) function, the maximum recorded waveform length is 80,000 frames. Automatic measurements on 50+ parameters, supports statistics with histogram, track, trend, Gating measurement, and measurements on Math, History and Ref. 4 Math traces (2 Mpts FFT, addition, subtraction, multiplication, division, integration, differential, square root, etc.), supports formula editor. Abundant data analysis functions such as Search, Navigate, Counter, Bode plot and Power Analysis High Speed hardware-based Mask Test function, with Mask Editor tool for creating user-defined masks 16 digital channels (optional) 25 MHz waveform generator (optional) 7" TFT-LCD display with 1024 x 600 resolution; Capacitive touch screen supports multi-touch gestures. Interfaces include: USB Hosts, USB Device (USBTMC), LAN (VXI-11/Telnet/Socket), Pass/Fail, Trigger Out Built-in web server supports remote control over the LAN port using a web browser. Supports SCPI remote control commands. Supports external mouse and keyboard. Supports NTP. Specifications Analog Channels 2 Bandwidth 200 MHz Vertical resolution 12-bit Sample rate (Max.) One channel mode: 100 Mpts/chTwo channel mode: Mpts/chFour channel mode: 25 Mpts/ch Memory depth (Max.) One channel mode: 50 Mpts/chTwo channel mode: 25 Mpts/ch Waveform capture rate (Max.) Normal mode: 120,000 wfm/sSequence mode: 500,000 wfm/s Trigger type Edge, Slope, Pulse width, Window, Runt, Interval, Dropout, Pattern, Video, Qualified, Nth edge, Delay, Setup/Hold time, Serial Serial trigger and decode (Standard) I²C, SPI, UART, CAN, LIN Measurement 50+ parameters, statistics, histogram, trend, and track supported Math 4 traces 2 Mpts FFT, Filter, +, -, x, ÷, ∫dt, d/dt, √, Identity, Negation, Absolute, Sign, ex, 10x, ln, lg, Interpolation, MaxHold, MinHold, ERES, Average. Supports formula editor Data analysis Search, Navigate, History, Mask Test, Counter, Bode plot, and Power Analysis Digital channel (optional) 16-channel; maximum sample rate up to 1 GSa/s; record length up to 10 Mpts USB AWG module (option) One channel, 25 MHz, sample rate of 125 MHz, wave length of 16 kpts, isolated output I/O 2x USB 2.0 Host, USB 2.0 Device, 10/100 M LAN, Auxiliary output (TRIG OUT, PASS/FAIL), SBUS (Siglent MSO) Probe (Standard) Passive probe PB470 for each channel Display 7 TFT-LCD with capacitive touch screen (1024x600) Included 1x Siglent SDS822X Oscilloscope 2x Passive probe (200 MHz) PP520 1x Power cord (EU) 1x USB cable 1x Certificate of calibration 1x Quick start Downloads Datasheet Manual Programming guide

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Aus dem Inhalt Sieben Jahre Elektor Röhren-Sonderhefte Der Kompressionseffekt oder das Geheimnis des Schirmgitters Phasenumkehrstufen Gitterwiderstand und Gitterstrom Eintakt-A-Endstufe mit der 6C33 Single-Ended-Endstufe mit der legendären Röhre 300B Eintaktverstärker: Eine Handvoll gutklingender Watt Parallel-Push-Pull-Monoblock mit 140 Watt Ruhestromsteuerung von Röhrenendstufen mithilfe eines Mikrocontrollers Kompakter Stereo-Röhrenverstärker mit der ECL 85 2-V-1-Audion für Mittel- und Kurzwelle Hi-Fi-Röhren-Endstufe Das Klanggeheimnis von sauerstofffreiem Kupferkabel Stereo-Basisbreite Röhrendaten mit Sockelschaltungen

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The OWON SDS1104 oscilloscope is a practical choice for engineers, technicians, students, and hobbyists who need accurate signal analysis without the cost of high-end instruments. With its 100 MHz bandwidth and 1 GSa/s sampling rate, it reliably captures low- to mid-frequency signals, making it well suited for electronics development, troubleshooting, and educational use. Equipped with a 7-inch color TFT display, the SDS1104 provides clear waveform visualization, while automatic measurement functions and FFT analysis help users quickly evaluate frequency, voltage, and timing parameters. Advanced math operations, cursor measurements, and multiple trigger modes add further flexibility, making the oscilloscope a versatile tool for a wide range of testing scenarios. Specifications Bandwidth 100 MHz Sample Rate 1 GS/s Horizontal Scale (s/div) 5ns/div - 1000s/div, step by 1 - 2 - 5 Channel 4 Display 7" color LCD, 800 x 480 pixels Input Coupling DC, AC and GND Vertical Resolution (A/D) Vertical Resolution (A/D) Vertical Sensitivity 5mV/div - 5V/div (at input) Trigger Type Edge, Video Trigger Mode Auto, Normal and Single Waveform Math ＋, －, x, ÷, invert, FFT Fuse 2A, T class, 250 V Dimension (W x H x D) 301 x 152 x 70 mm Weight 1.1 kg Included 1x OWON SDS1104 Oscilloscope 1x Mains power cord 1x CD Rom 1x Quickstart Guide 1x USB Cable 4x Oscilloscope probe 1x Probe Adjust Downloads Datasheet Manual

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Inhalt Röhrentechnik iPod-Röhrenverstärker Opus 2: Hybrid-Technik mit Silizium-Vorstufe Single Ended mit 2x 2 Watt: Minimalistisches Design mit Triode Der General II: Eine 300B-Version mit interner Trafo-Kopplung Experimenteller 30-W-Röhrenverstärker: Ein Entwurf – viele Varianten Vielseitiger Gitarrenverstärker: Röhrenbestückte Klangmaschine Hybrider Leistungsverstärker: Ultralinearschaltung mit EL34 und Operationsverstärker Crownstone Tubecharger: Gitarrenverstärker im Retro-Design Lautsprecher Pipeline: Das ganz spezielle Line Array Nescio: Aktiv mit Hypex-DSP Synchron Center und Rear: MTM-Design für die Home-Cinema-Fraktion und der passende kleine Bruder dazu 261-PA: Zwei 6-Zöller plus Kalotte und HiFi-Abstimmung Tura: Mission mal unübersehbar anders Quintett: Edles von Visaton mit sechsfacher Bestückung Halbleitertechnik Entstörung von Röhrenverstärkern: Die Tipps gegen Brummen, Knistern und Rauschen 600 Watt Pure Path: Kompletter Verstärker mit dem ganz besonderen Chip von Texas Instruments

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