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Quite unintentionally a one-page story on an old Heathkit tube tester in the December 2004 edition of Elektor magazine spawned dozens of ‘Retronics’ tales appearing with a monthly cadence, and attracting a steady flow of reader feedback and contributions to the series. Since launching his Retronics columns, Elektor Editor Jan Buiting has never been short of copy to print, or vintage equipment to marvel at. This book is a compilation of about 80 Retronics installments published between 2004 and 2012. The stories cover vintage test equipment, prehistoric computers, long forgotten components, and Elektor blockbuster projects, all aiming to make engineers smile, sit up, object, drool, or experience a whiff of nostalgia. To reflect that our memories are constantly playing tricks on us, and honoring that “one man’s rubbish is another man’s gem”, the tales in the book purposely have no chronological order, and no bias in favor of transistor or tube, microprocessor or discrete part, audio or RF, DIY or professional, dry or narrative style. Although vastly diff erent in subject matter, all tales in the book are told with personal gusto because Retronics is about sentiment in electronics engineering, construction and repair, be it to reminisce about a 1960s Tektronix scope with a cleaning lady as a feature, or a 1928 PanSanitor box for dubious medical use. Owners of this book are advised to not exceed one Retronics tale per working day, preferably consumed in the evening hours under lamp light, in a comfortable chair, with a piece of vintage electronic equipment close and powered up.

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Home Information SystemUsing Windows on a Raspberry Pi Starting with Node-REDAn open-source visual block-based programming tool Elektor Summer GiveAway Simple Function Generator: With Reverse-Order Signal Creation GreatScott! Builds a LoRa Alarm System Review: Joy-iT RD6006 Benchtop Power Supply Kit Review: The GreatFET One Interface Board Small Circuits Revival – XXLEscaped from the Suggestions Box Poorest Man's External 2.4 GHz Wi-Fi Antenna Simple On-Off Temperature Controller with Raspberry Pi HAT How to Take (Successful) Photos of ElectronicsShowing your projects in their best light Review: The I2CDriver Tool Review: JOY-iT Joy-View Portable Touchscreen LED Booster for MicrocontrollersWith just one component Experimental Ultrasonic Clothes Washer Review: The Joy-iT JDS2915 Signal GeneratorA 2-Channel Signal Generator and Frequency Counter Traffic Lights Programmed in PIC Assembly Code E-E-E-ternal Blinker Experimental Hall Sensor Tracing Shorts with the Milli-Ohm or ESR Meter Review: Elektor SDR Hands-on Kit Elektor Labs Pipeline Elektor KickstarterWell, you get the idea. Do You Really Need All That Stuff???This is where I spend many hours working on electronics projects Homelab Tours: The Kinetic Clock MakerStargate jigsawed! Hello, World! We’re Elektor, and We’re Social M4 + 2x A7 + GPU: An Unbalanced Dream TeamLatest STM32MP1-SoCs can tackle demanding applications Test Rig for 16F18877 & Similar Big PICs Inter-Microcontroller Traffic with the SPI Bus and ATmega328p Six Shades of LF/AF OSC (and the Miller’s Tale) BBC micro:bit Absolute Minimalist Oscilloscope with LED Display ‘Knight Rider’ LED Chaser with the ESP32 LW/MW AM Signal Generator with ATtiny13 Absolute Minimalist Dip Meter Photovoltaic Regulator UpdateNew function for measuring battery temperature Wireless SignallingTransmitting switching signals over LPR Ultrasonic Reverse Parking Aid with Arduino Uno Distortion Pedal with Op Amp and Space Charge Tubes Electronics Workspace Essentials Hexadoku Artificial Intelligence for Beginners (2)Neural networks with Linux and Python

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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. PbMonitor v1.0Un système de surveillance des batteries pour les applications à onduleurs et de stockage d'énergie contrôleur de charge solaire avec MPPT (1)Principes de base d'un contrôleur de charge solaire pour les systèmes autonomes magnétomètre à intégration du champ et capteurs artisanaux exactitude, ou précision ?vos appareils doivent posséder les deux ! AD7124 : un C/AN de précision en pratiqueFeatures for Sensor Signal Conditioning outil de contrôle PIDOptimisez facilement vos paramètres embedded world 2025 démarrer en électronique...…contrôle de la tonalité Academy Pro BoxLivre + cours en ligne + matériel adaptateur Milliohm-mètreUtilisant la précision de votre multimètre Un nouveau jalon dans le domaine des semi-conducteursEn route vers le 1,4 nm Connecteurs à technologie traversanteLe meilleur des deux mondes : THR fréquencemètrePortable et auto-calibré par GPS compteurs analogiquesDrôles de composants, la série testeur de quartz autonomeQuelle est la précision de votre source d'horloge ? testeur I²C peu couteuxconnecter des appareils I²C directement à votre PC sur le vifbienvenue chez les Pt’tites 2025 : une odyssée de l'IAL'impact transformateur sur le développement de logiciels projet 2.0Corrections, mises à jour, et courrier des lecteurs synthétiseur MIDI autonome Raspberry Pi (2)Améliorons notre configuration avec l’Intelligence oscillateur à pont de Wien "nortonisé"Petite cause, grand effet tester un microcontrôleur à 0,10 $Le microcontrôleur CH32V003 RISC-V et MounRiver Studio en pratique un lecteur audio avec égaliseur basé sur un FPGA (2)Ajout d'un réglage du volume, d'un mixage avancé et d'une interface Web

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Elektor GREEN and GOLD members can download their digital edition here. Not a member yet? Click here. PbMonitor v1.0A Battery-Monitoring System for UPS and Energy Storage Applications Solar Charge Controller with MPPT (1)Basic Principles of a Solar Controller for Stand-Alone Systems B-Field Integration Magnetometer With Home-Made Sensors Precise or Accurate?Your Instruments Need to Be Both! AD7124 A Precision ADC in PracticeFeatures for Sensor Signal Conditioning PID Control ToolOptimize Your Parameters Easily embedded world 2025 Starting Out in Electronics……Continues with Tone Control Academy Pro BoxBook + Online Course + Hardware Milliohmmeter AdapterUses the Precision of Your Multimeter The Next Leap in SemiconductorsOnward Toward 1.4 nm Through-Hole Technology ConnectorsThe Best of Two Worlds: THR Frequency CounterPortable and Auto-Calibrating Via GPS Analog MetersPeculiar Parts, the Series Stand-Alone Crystal TesterHow Accurate Is Your Clock Source? Low-Cost I²C TesterConnect I²C Devices Directly to Your PC From Life’s ExperienceWho Doesn’t Honor the Small Things? 2025: An AI OdysseyThe Transformative Impact on Software Development Err-lectronicsCorrections, Updates, and Readers’ Letters Raspberry Pi Standalone MIDI Synthesizer (2)Enhancing Our Setup with Intelligence Nortonized Wien Bridge OscillatorSmall Changes Yield Significant Improvements Putting a $0.10 Controller to the TestThe CH32V003 RISC-V Microcontroller and MounRiver Studio in Practice An FPGA-Based Audio Player with Equalizer (2)Adding Volume Control, Advanced Mixing, and a Web Interface

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Über 50 Schaltungen und Projekte Sirene im US-Stil Zwei Drehgeber an einem Analogeingang Wie man mit dem Arduino einen 230-V-AC-Dimmer baut Zehnfache LED-Stromquelle Vier Schalter an einem Pin erkennen Ein/Aus-Schalter mit Akku-Füllstandskontrolle Handdesinfektionsmittel-Spender selbstgebaut Eine einfache elektronische Orgel Ultra-einfacher Stereo-Verstärker Sound Activated Switch für Verstärker Balanced/Unbalanced-Wandler Externer Netzfilter Tastenfreie Torsteuerung DI-Box für ein Smartphone Spaß mit Lauflichtern Ein-Knopf-Thyristor-Steuerung Quasi-analoger Belichtungstimer für die Dunkelkammer Schaltungen von der Hackster.io-Community Analoger Bräunungstimer Noch eine Ein-Draht-LCD-Schnittstelle Einfacher PWM-Generator mit ATtiny13 Zweites Leben für Batterien Touch-Schalter für LED-Leuchten Tester für LEDs und DIP-Schalter Funktionstester für IR-Fernbedienungen Leistungshalbleiter-Tester SPI für WS2812(B)-LEDs Messen von Leistungsinduktivitäten Ein DIY-Doppelnetzteil DIY-Testvorrichtung für das LCR-Meter Arduino-Amperemeter Zwei-Finger-Orgel Rauscharmer ADC-Kalibrator DC/DC-Aufwärtswandler Zwei Potentiometer an einem digitalen Eingang Akustischer Näherungssensor Batterieloser Heizkörper-Sensor Wanzen und drahtlose Kameras aufgespürt Timer für die Innenbeleuchtung im Auto Kerzensimulator Digitaler Küchentimer Milliohmmeter Verzögerungstimer für Heißwasserbereiter Einfaches Ladegerät für zwei Zellen des Typs 18650 Winzige Frequenzreferenz Sparsamer IR-Schalter Recyceln Sie Ihren Auto-Handylad! Mikrofon-Vorverstärker für Arduino EMI-Filter im Selbstbau Elektronischer Würfel – ganz ohne MCU Finger-Kondensator Der selbstladende LED-Blitzer Außerdem in dieser Ausgabe KiCad 6 – Fünf interessante neue Funktionen Flashback – Der Elektor-Computer SC/MP Interview – Mit Elektrizität Kunst machen Meine erste Platine – Crash-Einstieg in KiCad Mit intelligenter Software-Hardware minimieren Infografik – Fakten und Zahlen Neue ICs von Analog Devices Flashback – DER Elektor-Metalldetektor Hexadoku – Sudoku für Elektroniker

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Elektor GREEN and GOLD members can download their digital edition here. Not a member yet? Click here. Arduino Portenta Machine Control and Arduino Portenta H7A CAN-to-MQTT Gateway Demo Project Unboxing the Elektor LCR Meter with David Cuartielles MicroPython Enters the World of Arduino Connected Projects, SimplifiedDive Into the Arduino Cloud Introduction to TinyMLBig Is Not Always Better Arduino K-Way Writing Arduino Sketches Just Got Better Get to Know Arduino Getting Started with the Portenta X8Manage Software Securely with Containers Build, Deploy, and Maintain Scalable, Secure ApplicationsWith Arduino Portenta X8 Featuring NXP’s i.MX 8M Mini Applications Processor and EdgeLock SE050 Secure Element How I Automated My HomeArduino CEO Fabio Violante Shares Solutions Altair 8800 SimulatorHardware Simulation of a Vintage Computer MS-DOS on the Portenta H7Run Old-School Software on Contemporary Hardware Grow It YourselfA Digitally Controlled, Single-Box Solution for Indoor Farming Save the Planet With Home Automation?MQTT on the Arduino Nano RP2040 Connect Go Professional with Arduino Pro Smart Ovens Take a Leap Into the Future Tagvance Builds Safer Construction Sites with Arduino Santagostino Breathes Easywith Remote Monitoring that Leverages AI for Predictive Maintenance Security Flies High with RIoT Secure’s MKR-Based Solution Open-Source Brings a New Generation of Water Management to the World SensoDetect Deforestation with Sound Analysis The Mozzi Arduino Library for Sound SynthesisInsights from Tim Barrass The New Portenta X8 (with Linux!) and Max Carrier Redefine What’s Possible How Using Arduino Helps Students Build Future Skills Must-Haves for Your Electronics Workspace The Importance of Robotics in Education Dependable IoT Based Upon LoRa Unboxing the Portenta Machine Control 8-Bit Gaming with Arduboy Reducing Water Usage at Horseback Riding TracksAn IoT to Constantly Monitor Soil Humidity and Temperature Levels The Panettone ProjectA sourdough starter management and maintenance system Supporting Arduino Resellers Space Invaders with Arduino Art with ArduinoInspiring Insights from Artists and Designers Arduino Product Catalogue The Future of Arduino

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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! PbMonitor v1.0Ein Batterieüberwachungssystem für USV und Energiespeicher Solarladeregler mit MPP-TrackingTeil 1: Grundlagen eines Solarreglers für Insel-Anlagen B-Feld-Integrationsmagnetometer mit selbstgebauten Sensoren Präzise, richtig oder genau?Ihre Messgeräte müssen alles sein! AD7124 – Ein Präzisions-ADC in der PraxisHinweise für die Sensor-Signalaufbereitung PID-RegelungswerkzeugOptimieren Sie ganz einfach Ihre Parameter embedded world 2025 Aller Anfang ......muss nicht schwer sein: Klangeinstellung! Academy Pro BoxBook + Online Course + Hardware Milliohmmeter-AdapterNutzen Sie die Präzision Ihres Multimeters! Der nächste Meilenstein bei HalbleiternWeiter in Richtung 1,4 nm Steckverbinder in DurchstecktechnikDas Beste aus zwei Welten: THR FrequenzzählerPortabel und mit automatischer GPS-Kalibrierung Analoge MessgeräteBemerkenswerte Bauteile Stand-alone-QuarztesterWie genau ist Ihre Taktquelle? Preiswerter I²C-TesterSchließen Sie I²C-Chips direkt an Ihren PC an Aus dem Leben gegriffenWer das Kleine nicht ehrt... 2025: Eine Odyssee in die KIDie transformativen Auswirkungen auf die Softwareentwicklung Projekt 2.0Korrekturen, Updates und Leserbriefe Standalone-MIDI-Synthesizer mit Raspberry PiTeil 2: Setup mit Intelligenz aufwerten Nortonisierter Wien-Brücken-OszillatorKleine Änderungen führen zu bedeutenden Verbesserungen 10-Cent-Controller in der PraxisRISC-V-Mikrocontroller CH32V003 und MounRiver Studio ausprobiert Audio-Player mit FPGA und EqualizerTeil 2: Lautstärkeregelung, erweitertes Mischen und ein Web-Interface

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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. PbMonitor v1.0Een accu-bewakingssysteem voor UPS en energieopslag toepassingen Zonne-laadregelaar met MPPT (1)basisprincipes van een zonne-laadregelaar voor autonome systemen Integrerende B-veld magnetometermet zelfgemaakte sensoren Precies of nauwkeurig?Je instrumenten moeten het allebei zijn! AD7124 Een precisie-ADC in de praktijkEssentieel voor Sensorsignaalconditionering PID-regeltoolGemakkelijk PID-parameters optimaliseren embedded world 2025 Alle begin......gaat verder met de toonregeling Academy Pro BoxBoek + onlinecursus + hardware Milliohmmeter adapterGebruik de nauwkeurigheid van uw multimeter De volgende sprong in halfgeleidersVoorwaarts naar 1,4nm Through-hole connectorenHet beste van twee werelden: THR FrequentietellerDraagbaar en Automatische Kalibratie met GPS Analoge metersVreemde onderdelen, de serie Stand-alone kristaltesterhoe nauwkeurig is uw kloksignaal? Goedkope I²C-testersluit I²C-apparaten rechtstreeks op uw PC aan Uit het leven gegrepenwie het kleine niet eert... 2025: een AI-odysseede transformerende invloed op softwareontwikkeling Err-lectronicsCorrecties, updates en ingezonden brieven Raspberry Pi standalone MIDI-synthesizer (2)We verbeteren onze setup met intelligentie Norton-getransformeerde wienbrug-oscillatorkleine verandering, grote verbetering Test van een 10-cent-controllerde CH32V003 RISC-V microcontroller en MounRiver Studio in de praktijk Een FPGA-gebaseerde audiospeler met equalizer (2)volumeregeling, geavanceerd mixen en een webinterface

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The Elektor LoRa NodeVersatile, long-range, 868-MHz remote control with state feedback and STM32 Inside InteractiveCorrections & Updates || Questions & Answers Analogue Electronics DesignCase Study #1 — Section 2: Preamplifier optimized for MEMS microphone My IoT Button: A Button for the WebPart 1: IoT architecture BASIC for the ESP32 and ESP8266Programming with Annex WiFi RDS ESP32 Doorbell via Telegram“The UPS Man Always Rings Once” Small Circuits RevivalCapita Selecta from the Elektor Project Suggestions Box My First LoRaWANWith Blue Pill, LoRa Breakout Board and The Things Network Elektor Connexions 2003EL “A Strong Supporter of Open Internet”Interview with Wienke Giezeman, Initiator of The Things Network The Meadow F7 BoardA great board for .NET developers Practical ESP32 Multitasking (2)Task priorities Sigfox and the IoT (3)First steps on the network Raspberry Pi Bash Command Cheat Sheet Europe's Most Successful Start-up Accelerator?HighTechXL, Eindhoven, The Netherlands Review: The Enviro+ RPi-HATMeasure air quality with a Raspberry Pi and the Enviro+ HAT Steeped in Electronicsordering components from Ukraine and Russia Review: Andonstar AD407Better than its predecessor? Lab, Sweet LabA glimpse of The Holy Place — no unauthorized entry. Optical Probe for OscilloscopesMeasure brightness fluctuations of lighting systems The 'TABULA' Project - An UpdateTangibles with user feedback How-To Calculate the Prospective Short-Circuit Current or PSCCand choose the proper circuit breaker TMS1000 Series Microcontrollers Peculiar Parts, the series Starting Out in Electronics (2) Easier than imagined! Developer's ZoneTips & Tricks, Best Practices and Other Useful Information Locating Wayward Wires Track and trace concealed and defective cables with ease and certainty Review: Joy-IT DMSO2D72 Portable 3-in-1 Oscilloscope Homebrew PC for the Electronics LabTips on Component Choice and Construction The Elektor ‘Intelekt’ Chess Computer (1981)Tiny Chess 86 ported to the Intel 8088 Beyond ElectronicsPCB Art - Pushing the Limits of Industrial Manufacturing

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Over 50 Circuits & Projects US-Style Siren Two Rotary Encoders on One Analog Input How to Build a Digital 220-V AC Dimmer with Arduino Current Source for LEDs Detect Four Switches with 1 Pin Tiny On/Off Switch with Battery Level Check DIY Hand Sanitizer Dispenser A Simple Electronic Organ Ultra-Simple Stereo Amplifier Sound Activated Switch for Amplifiers Balanced/Unbalanced Converter External Mains Filter Button-Free Door Control DI Box for a Smartphone Fun With Running Lights One-Button Thyristor Control Quasi-Analog Exposure Timer for the Dark Room Circuits Galore From the Hackster.io Community Analog Tanning Timer Yet Another Single-Wire LCD Interface Simple AVR ATtiny13-Based PWM Generator Second Life for Batteries Touch Switch for LED Lights Tester for LEDs and DIP Switches Go/No-Go IR Control Tester Power Semiconductor Tester SPI for WS2812(B) LEDs Measuring Power Inductors One Plug for Raspberry Pi and Audio DAC DIY Test Fixture for the LCR Meter Arduino Ammeter Two-Finger Organ Low Noise ADC Calibrator DC/DC Boost Converter Two Potentiometers on One Digital Input Acoustic Proximity Sensor Battery-Free Radiator Sensor A Circuit for Detecting Bugs and Wireless Cameras Car Interior Light Timer Candle Simulator Digital Kitchen Timer Milliohm Meter Hot Water Production Delay Timer Simple Charger for 2S 18650 Cells Tiny Frequency Reference Low-Power IR Switch Recycle Your Car’s Telephone Charger Microphone Pre-Amp for Arduino DIY EMI Filters Electronic Dice Without an MCU Finger Capacitor A Self-Charging LED Flasher Also in this edition KiCad 6 – Five Features to Consider Flashback – The Elektor SC/MP Computer Interview – Making Art with Electricity My First PCB – Going Head First Into KiCad Minimizing Hardware with Smart Software Infographics – Facts and Figures New Devices from Analog Flashback – The Elektor Metal Detector Hexadoku – The Original Elektorized Sudoku

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Meer dan 50 schakelingen & projecten US-sirene Twee draai-encoders op één analoge ingang Digitale 220VAC-dimmer met Arduino Stroombron voor LED’s Vier schakelaars detecteren met één pin Kleine aan/uit-schakelaar met accucontrole Desinfectie-dispenser voor zelfbouw Eenvoudig elektronisch orgel Simpele stereoversterker Audiogestuurde schakelaar Gebalanceerd/ongebalanceerd-converter Extern netfilter Knoploze garagedeurbediening DI-box voor smartphone Pret met een looplicht Eenknops-thyristorbesturing Quasi-analoge belichtingstimer voor de donkere kamer Schakelingen bij de Hackster.io-community Analoge zonnebad-timer Weer een eendraads LCD-interface Simpele PWM-generator met AVR ATtiny13 Een tweede leven voor batterijen Aanraakschakelaar voor LED-verlichting Tester voor LED’s en DIP-schakelaars IR-afstandsbedieningstester Tester voor vermogens-halfgeleiders SPI voor WS2812(B)-LED’s Meten van vermogens-zelfinducties Eén stekker voor Raspberry Pi en Audio DAC Doe-het-zelf meetklem voor de LCR-meter Arduino-ampèremeter Tweevinger-orgel Ruisarme ADC-kalibrator DC/DC-boostconverter Twee potmeters op één digitale ingang Akoestische nabijheidssensor Batterijloze radiatorsensor Speurneus voor draadloze camera’s en microfoons Timer voor auto-binnenverlichting Kaarssimulator Digitale keukentimer Milliohm-meter Warmwatervertrager Eenvoudige lader voor twee (of meer) 18650-cellen Mini-frequentiereferentie Zuinige IR-schakelaar Hergebruik de telefoonlader van je auto Microfoon-voorversterker voor Arduino EMI-filters voor zelfbouw Elektronische dobbelsteen zonder MCU Vingercondensator Zelfladende flits-LED Ook in deze editie KiCad 6 – vijf interessante nieuwe functies Retrotronica – de Elektor SC/MP-computer Interview – kunst maken met elektriciteit Mijn eerste print – spring in het diepe... met KiCad Met slimme software de hardware minimaliseren Elektor Infographics – feiten en cijfers Nieuwe componenten van Analog Optimalisering van de signaalintegriteit – Industry 4.0 vereist vlekkeloos werkende interfaces7 Hexadoku – puzzelen voor elektronici

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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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