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50+ Android Apps with Raspberry Pi, ESP32 and Arduino This book is about developing apps for Android compatible mobile devices using the MIT App Inventor online development environment. MIT App Inventor projects can be in either standalone mode or use an external processor. In standalone mode, the developed application runs only on the mobile device (e.g. Android). In external processor-based applications, the mobile device communicates with an external microcontroller-based processor, such as Raspberry Pi, Arduino, ESP8266, ESP32, etc. In this book, many tested and fully working projects are given both in standalone mode and using an external processor. Full design steps, block programs, circuit diagrams, QR codes and full program listings are given for all projects. The projects developed in this book include: Using the text-to-speech component Intonating a received SMS message Sending SMS messages Making telephone calls using a contacts list Using the GPS and Pin-pointing our location on a map Speech recognition and speech translation to another language Controlling multiple relays by speech commands Projects for the Raspberry Pi, ESP32 and Arduino using Bluetooth and Wi-Fi MIT APP Inventor and Node-RED projects for the Raspberry Pi The book is unique in that it is currently the only book that teaches how to develop projects using Wi-Fi and Node-RED with MIT App Inventor. The book is aimed at students, hobbyists, and anyone interested in developing apps for mobile devices. All projects presented in this book have been developed using the MIT App Inventor visual programming language. There is no need to write any text-based programs. All projects are compatible with Android-based mobile devices. Full program listings for all projects as well as detailed program descriptions are given in the book. Users should be able to use the projects as they are presented, modifying them to suit their own needs.

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Elektor GREEN and GOLD members can download their digital edition here. Not a member yet? Click here. The ESP-BLASTA Mini ESP32 Rocket Drone That Flies 100 km/h+ Wireless Workshop (1)Radio Modules Unlocked: 433 MHz CC1101 Sub-GHz Transceiver AM TransmitterWith Square/Sine Wave Generator on Raspberry Pi Pico STM32Cube Innovation ChallengeCompete with Your Best STM32C5 Design CoffeeCallerHow a Long Hallway Led to a Custom Mesh-Networked PCB AudiotronicsTotal Harmonic Distortion Elektor at 65Projects from Septembers and Octobers Past Bluetooth Channel Sounding for Asset TrackingCentimeter-Level Precision Ranging for Next-Generation IoT 2026: An AI OdysseyQuantum Computing Is Not the Next GPU Protecting the Cloud Demands Security at the Edge First Experiences with the HackRF ProPractical Tests with the New SDR Hardware Modem Upgrade from GPRS/2G to LTE/4GUsing a Wireless Alarm Control Panel as an Example Loop Antenna with RF BricksPart 1: A DIY Shortwave Antenna with Adjustable Directivity Internet Radio to AM ConverterUsing an ESP32-S3 as Transmitter Err-lectronics mioty — An OverviewFraunhofer’s Approach to LPWAN Workbench WisdomPractical Tips from Experts Walter, the Compact IoT ModulePart 2: Accessing Weather and Data Services

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KENNISMAKING MET NEURONEN IN NEURALE NETWERKEN (DEEL 1)Kunstmatige Neuronen EMC PRE-COMPLIANCE TEST VOOR UW DC-GEVOED PROJECT (DEEL 1)Dubbele DC-LISN ELEKTRONISCHE BELASTING VOOR DC EN ACTot 400 V en 10 A (piek) ALLE BEGIN......neemt het op tegen de spoel! BEELDVERWERKING MET DE NVIDIA JETSON NANO (DEEL 1)De Hardware en Software EEN GEDETAILLEERD ONDERZOEK NAAR NETTRANSFORMATORENIn- en uitschakelgedrag YES WE CAN MET PICAN 3Een CAN Bus HAT voor de Raspberry Pi 4 ZONNEPANELEN OP JE BALKONZelfbouw balkoncentrale = snel terugverdiend! BEELDVERWERKING EN VIDEO-STREAMING MET EEN RASPBERRY PI 4De Raspberry Pi High-Quality Camera in de praktijk DISPLAYS GEBRUIKEN IN RASPBERRY PI-PROJECTENEen hoofdstuk als voorbeeld: Organische LED-displays (OLED) KENNISMAKING MET DE PARALLAX PROPELLER 2 (DEEL 4):Tekens Versturen ELEKTOR @ 60Een terugblik op voorgaande septembers OOST WEST LAB BESTop het Friese platteland, waar de buizen bloeien... HYBRIDENVreemde onderdelen, de serie EEN KOMPASROOS MET DE GY-271Of waarom we in een acht bewegen om een sensor te kalibreren HOE GROOT IS UW VOETAFDRUK?Bereken de ecologische voetafdruk van uw elektronica CONNECTED THERMOSTAAT MET ESP32Houd uw wijn op de juiste temperatuur! MAGNETISCHE LEVITATIE OP DE DIGITALE MANIERESP32 Pico vervangt de Analoge Comparator ULTIMATE ARDUINO UNO HARDWARE MANUALEen hoofdstuk als voorbeeld: Main Microcontroller Bootloader MICROPYTHON VOOR DE ESP32 C.S. (DEEL 2)Eenvoudig Matrix Displays besturen MADMACHINE SWIFTIO BOARDModerne taal ontmoet moderne Hardware UIT HET LEVEN GEGREPENKnipperlichtrelatie HEXADOKUThe Original Elektorized Sudoku

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Build your textbook weather station or conduct environmental research together with the whole world. With many practical projects for Arduino, Raspberry Pi, NodeMCU, ESP32, and other development boards. Weather stations have enjoyed great popularity for decades. Every current and even every long discontinued electronics magazine has regularly featured articles on building your own weather station. Over the years, they have become increasingly sophisticated and can now be fully integrated into an automated home — although this often requires loyalty to an (expensive) brand manufacturer across all components. With your own weather and environmental data, you can keep up and measure things that no commercial station can. It’s also fun: expand your knowledge of electronics, current microcontroller development boards and programming languages in a fun and meaningful way. For less than 10 euros you can get started and record your first environmental data — with time and growing interest, you will continue to expand your system. In this Edition Which Microcontroller Fits My Project? The Right Development Environment Tracking Wind and Weather Weather Display with OpenWeatherMap and Vacuum Fluorescent Display Volatile Organic Compounds in the Air We Breathe Working with MQ Sensors: Measuring Carbon Monoxide — Odorless but Toxic CO2 Traffic Light with ThingSpeak IoT Connection An Automatic Plant Watering System Good Indoor Climate: Temperature and Humidity are Important criteria Classy Thermometer with Vintage Tube Technology Nostalgic Weather House for the Whole Family Measuring Air Pressure and Temperature Accurately Sunburn Warning Device DIY Sensor for Sunshine Duration Simple Smartphone Says: Fog or Clear View? Identifying Earthquakes Liquid Level Measurement for Vessels and Reservoirs Water pH Value Measurement Detecting Radioactive Radiation GPS: Sensor Location Service Across the Globe Saving and Timestamping Log Files on SD Cards LoRaWAN, The Things Network, and ThingSpeak Operating a LoRaWAN Gateway for TTN Defying "Wind and Weather" Mega Display with Weather Forecasz

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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. DHZ-accusysteem voor zonne-energiebouw uw eigen energieopslag voor zonnepanelen Simulator voor zonnepanelentest en optimaliseer MPP-trackers en omvormers De STM32 Edge-AI-ContestOntdek de nieuwe STM32N6 en ding mee naar € 5000! Vergroten van de bandgapdaarom is er zoveel interesse in SiC en GaN Powerbank voor noteboekgeef uw oude laptop een tweede leven Medische robotshet overwinnen van technische en regelgevende barrières Vorstbescherming voor fruitbomenmet temperatuurlogger Het analoge dingde Arduino onder de analoge computers? Zuinige relaisdriverspaart 90% spoelstroom Verbetering van de ET5410A+ DC-belastingblijf koel en stil electronica 2024een terugblik Elektromagnetische compatibiliteitEMC in een notendop! Alle begin......filtert actief Reduceer vermogensverlies met seriecondensatorenslim gebruik van capacitieve reactantie De betaalbare MCP4725 12-bit digitaal/analoog-omzetterEEPROM-functie zorgt voor veilig inschakelgedrag FNIRSI LCR-ST1 smart LCR-meetpincet Raspberry Pi-gebaseerd test- en meetlabals eerste: de ADC Elektronische belastingweerstandmet onderdelen die u waarschijnlijk hebt liggen 2025: een AI-odysseeenkele projecten voor het nieuwe jaar Project-update: AmpVolt v2.0100 ampère en meer! Project 2.0correcties, updates en brieven van lezers Ethische transparantie ontsluierdinzichten uit het Ethics in Electronics 2024 onderzoek Audio DSP FX Processor Boarddeel 2: toepassingen maken

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From Simple Ciphers to Secure Systems Understanding how to apply cryptography on modern microcontrollers is essential for building secure, reliable, and trustworthy systems. This book explains cryptography in the context of embedded hardware, from classical ciphers that illustrate core principles to modern techniques such as AES for practical high-security applications. By combining mathematical theory with real-world microcontroller implementations, readers learn not only how cryptography works, but also how to implement it effectively on systems with limited processing power and memory. The book is intended for students starting out in cryptography, hobbyists securing personal projects, and engineers looking for a structured guide to embedded security. The book covers these key topics in applied cryptography: Classical ciphers on Arduino Uno and Raspberry Pi Pico, with full programs: Spartan Scytale, Hebrew Atbash, Caesar, ROT13, Alberti Disk, Vigenère, Affine, Polybius, Playfair, Beaufort, Ottoman Codebook, and One-Time Pad. Hacking classical ciphers using microcontrollers, with examples. Pseudo-random (PRNG) and true random number generation (TRNG) on microcontrollers. Symmetric-key cryptography with full programs: DES and AES-128/256. Memory and speed constraints of cryptography on microcontrollers. Asymmetric cryptography: public/private keys, digital signatures, key distribution and derivation (KDF), RSA, and SHA-256 implementations. A complete secure communication program using RSA and AES-256. A glossary of commonly used cryptography terms.

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A Practical Guide to AI, Python, and Hardware Projects Welcome to your BeagleY-AI journey! This compact, powerful, and affordable single-board computer is perfect for developers and hobbyists. With its dedicated 4 TOPS AI co-processor and a 1.4 GHz Quad-core Cortex-A53 CPU, the BeagleY-AI is equipped to handle both AI applications and real-time I/O tasks. Powered by the Texas Instruments AM67A processor, it offers DSPs, a 3D graphics unit, and video accelerators. Inside this handbook, you‘ll find over 50 hands-on projects that cover a wide range of topics—from basic circuits with LEDs and sensors to an AI-driven project. Each project is written in Python 3 and includes detailed explanations and full program listings to guide you. Whether you‘re a beginner or more advanced, you can follow these projects as they are or modify them to fit your own creative ideas. Here’s a glimpse of some exciting projects included in this handbook: Morse Code Exerciser with LED or BuzzerType a message and watch it come to life as an LED or buzzer translates your text into Morse code. Ultrasonic Distance MeasurementUse an ultrasonic sensor to measure distances and display the result in real time. Environmental Data Display & VisualizationCollect temperature, pressure, and humidity readings from the BME280 sensor, and display or plot them on a graphical interface. SPI – Voltmeter with ADCLearn how to measure voltage using an external ADC and display the results on your BeagleY-AI. GPS Coordinates DisplayTrack your location with a GPS module and view geographic coordinates on your screen. BeagleY-AI and Raspberry Pi 4 CommunicationDiscover how to make your BeagleY-AI and Raspberry Pi communicate over a serial link and exchange data. AI-Driven Object Detection with TensorFlow LiteSet up and run an object detection model using TensorFlow Lite on the BeagleY-AI platform, with complete hardware and software details provided.

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De FNIRSI LCR-ST1 is een compacte, multifunctionele en intelligente LCR-tester die automatische metingen van weerstand, capaciteit, inductantie, diodetests en continuïteit ondersteunt. Het 1,14-inch kleurendisplay in combinatie met een handige magnetische adsorptiefunctie verbetert het gebruiksgemak, terwijl de ingebouwde lithiumbatterij van 250 mAh langdurige prestaties garandeert. Het apparaat ondersteunt drie frequentiebereiken (100 Hz, 1 kHz en 10 kHz) en biedt 0,3 V en 0,6 V RMS-testniveaus voor veelzijdige testtoepassingen. Het unieke pincetvormige ontwerp van de LCR-ST1 is ideaal voor delicate taken in kleine ruimtes en maakt het snel en nauwkeurig testen van elektronische componenten mogelijk. Het lichte gewicht en het draagbare ontwerp maken het tot een hulpmiddel van onschatbare waarde voor zowel veld- als laboratoriumgebruik. Of u nu een ervaren ingenieur bent of net begint in de elektronica, de LCR-ST1 levert betrouwbare en nauwkeurige meetresultaten, waardoor u uw taken efficiënter en nauwkeuriger kunt uitvoeren. Kenmerken Biedt 3 testfrequenties (100 Hz, 1 kHz, 10 kHz) en 2 testspanningsniveaus. Beschikt over automatische componentidentificatie voor snellere en betrouwbaardere metingen. 1,14-inch kleurendisplay met hoge resolutie voor duidelijke aflezingen. Ondersteunt automatische gegevensregistratie en -opslag. De pincetpunten zijn gemaakt van verguld messing voor verbeterde duurzaamheid en geleiding. Specificaties Weerstandsbereik 10 mΩ – 10 MΩ Capaciteitsbereik 1 pF – 22 mF Inductiebereik 1 μu – 10 H Diode Aanspanning 0,7 V Frequentietest 100 Hz, 1 kHz, 10 kHz Niveautest 0,3 V, 0,6 V RMS Parameterweergave ESR, D-waarde, Q-waarde, Z-waarde, X-waarde Display 1,14" HD-kleurenscherm Oplaadinterface USB-C, 5 V/1 A Voeding Ingebouwde lithiumbatterij van 250 mAh Automatische herkenningsmeting Ja Vervangbare pincetkop Ja Automatische uitschakeling Ja Gegevensopslag Ja Geschiedenisrecord Verbinden met pc om te bekijken en exporteren Afmetingen 28 x 19 x 150 mm Gewicht 41 g Inbegrepen 1x LCR-ST1 SMD-pincet 2x Haakpunten 1x Magnetische patch 1x USB-kabel 1x Opbergtas 1x Manual Downloads Manual Firmware V1.6

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Robotik und Künstliche Intelligenz

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Elektor GREEN and GOLD members can download their digital edition here. Not a member yet? Click here. electronica fast forward 2022 Start- & Scale-Up AwardsPreparations Speeding Up! Bluetooth Low Energy with ESP32-C3 and ESP32You Don’t Always Need to Choose Wi-Fi! Bluetooth Low Energy SnifferHacking a makerdiary nRF52840 MDK USB Dongle Magic RGB LED CubeHardware Design Around an RP2040 Auto On/Off for Solder Paste Compressor Elektor Video ContentLivestreams, Webinars, and Courses for Engineers and Pro Makers Bicycle ElectrificationHands-On with an E-Bike Retrofit Kit Starting Out in ElectronicsMultiplying Voltages From Life’s ExperienceSidelines Teensy 4.0Why Is This Board So Fast? Audio Power Amplifier Simulation with TINAThe Try-Before-You-Build Approach Develop and Operate Your LoRaWAN IoT NodesSample Chapter: Dragino LHT65, LDS01, and LDS02 LoRaWAN Modules Err-lectronicsCorrections, Updates and Readers’ Letters 5G Just for MeGaining Complete Control of 5G Deployments with Private Cellular Networks Infographics 7-8/2022 How Does My Device Learn to Transmit?Applications with Wi-Fi Interfaces Smartphones are the Heart of the IoT Audio Spectrum Analyzer with DekatronsA New Way to Use Vintage Tubes Sending Data to TelegramGet It Done with an ESP32 and a Few Parts A Fliege Notch Filter for Audio MeasurementsMake Better Measurements with a Notch Filter CO2 Meter TeardownIs It Hackable for Your Projects? PUT-ting It All TogetherThe Programmable Unijunction Transistor Explained Round Touchscreen for Raspberry PiHyperPixel 2.1 Round from Pimoroni Remote Sensing with Connection Loss DetectionUsing nRF24L01+ Modules Digital FM Receiver with Arduino and TEA5767Stayed Tuned with an Arduino Nano Changing an OLED Interface from SPI to I²C HomeLab ToursA Hobby Does Not Retire A Decade of Ethics in ElectronicsTessel Renzenbrink Reflects on the Digital Society and More HexadokuThe Original Elektorized Sudoku

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Das MQTT-Praxisbuch (E-book)

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Vom Messwert zur stabilen Entscheidung Wie wird aus einem einfachen Mikrocontroller ein intelligentes System, das Sensorwerte erfasst, verarbeitet und sinnvoll darauf reagiert? Dieses Buch zeigt es Ihnen Schritt für Schritt – verständlich, praxisnah und ohne unnötige Vorkenntnisse. Sie beginnen mit den Grundlagen der digitalen und analogen Ein- und Ausgänge. Anschließend lernen Sie, wie Sensorwerte gelesen, geglättet und zuverlässig bewertet werden. Anschauliche Beispiele erklären, warum einzelne Messwerte oft täuschen können und wie Mittelwertbildung, Hysterese und einfache Entscheidungsregeln für stabile Ergebnisse sorgen. Nach und nach erweitern Sie Ihre Projekte um Displays, I²C-Kommunikation und mehrere vernetzte Mikrocontroller. So entstehen verteilte Systeme, in denen Raspberry Pi Pico und ATtiny-Controller Daten austauschen und gemeinsam Aufgaben übernehmen. Im fortgeschrittenen Teil erhalten Sie einen leicht verständlichen Einstieg in Merkmalsbildung, Datenvorverarbeitung, hybride Entscheidungsmodelle und TinyML-nahe Anwendungen. Dabei verbinden Sie klassische Regelungstechnik mit modernen datenbasierten Methoden. Alle Projekte werden von ausführlich kommentierten Programmen in C und MicroPython begleitet. Das Buch richtet sich an Einsteiger, Maker, Studierende und alle, die Embedded-Systeme von Grund auf verstehen möchten. Am Ende können Sie eigene Systeme entwickeln, die nicht nur messen, sondern Informationen auswerten, zuverlässige Entscheidungen treffen und gezielt reagieren.

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