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Affordable solutions with the ESP8266 and 3D printing If you are looking for a small yet powerful IoT device, you are likely to come across the ESP8266 and compatible products on the market today. One of these, the Wemos/Lolin D1 Mini Pro board strikes a remarkable balance between cost and performance. A small and very affordable prototype board, the D1 Mini Pro stands out with its WiFi functionality and a 16-Mbytes flash memory for easy creation of a flash file system. In addition, there are sufficient input and output pins (only one analog input though) to support PWM, I²C, and One-Wire systems to mention but a few. The book describes the operation, modding, construction, and programming of home appliances including a colorful smart home accessory, a refrigerator/greenhouse controller, an AC powerline monitor, a door lock monitor, and an IKEA Trådfri controller. As a benefit, all firmware developed for these DIY, "IoT-ized" devices can be updated over-the-air (OTA). For most of the designs in the book, a small printed circuit board (PCB) and an enclosure are presented so readers can have a finished and attractive-looking product. Readers having – or with access to! – a 3D printer can "print" the suggested enclosures at home or in a shop. Some of the constructions benefit from a Raspberry Pi configured as a gateway or cms server. This is also described in detail with all the necessary configuring. You don’t need to be an expert but the prerequisites to successful replication of the projects include basic skills with PC software including the ability to surf the Internet. In terms of hardware, you should be comfortable with soldering and generally assembling the PCBs presented in the book. All custom software written for the IoT devices, the PCB layouts, and 3D print files described in the book are available for free downloading.

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Das UT196 True RMS Solar-Multimeter UT196 ist ein ideales Werkzeug für die Wartung von Solarstromanlagen. Dieses robuste Messgerät wurde für Techniker entwickelt, die in rauen Außenumgebungen arbeiten. UT196 kann Spannungen bis zu 1700 V DC und 1500 V AC sowie 3000 A AC Strom mit einem externen Stromzangensensor messen. Dieses Solarmessgerät bietet IP65-Schutz und übersteht auch Stürze aus 2 m Höhe. Das UT196 Solar-Multimeter ist mit einem Überlastschutz für 1700 V DC und 1500 Vrms AC ausgestattet und für den sicheren Einsatz in CAT III 1000 V und CAT IV 600 V Umgebungen getestet. Features True RMS Messen Sie bis zu 1700 V DC und 1500 V AC für Hochspannungsanwendungen, z. B. Solaranlage, Wind IP65-Schutz CAT III 1000 V, CAT IV 600 V Analogleiste Frequenzgang: 45 Hz ~ 1 kHz Tiefpassfilterfunktion Niederimpedanzmodus Eingebautes Blitzlicht, helle Hintergrundbeleuchtung und visueller Alarm Anwendungen Messung hoher Gleichspannungen Messung von Ausgangsspannung und Frequenz Spannungs- und Frequenzmessung Strom- und Frequenzmessung Technische Daten   Bereich UT196 Gleichspannung (V) 1700 V ±0,2% +5 Wechselspannung (V) 1500 V ±0,8% +3 Frequenz (Hz) 1 MHz ±0,08% +4 Widerstand (Ω) 60 MΩ ±0,8% +2 Kapazität (F) 60 mF ±1,9% +5 Stromversorgung 9-V-Batterie Abmessungen 195 x 95 x 58 mm Lieferumfang UT196 Solar-Multimeter Batterie Prüfkabel Downloads Datasheet Manual

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The Raspberry Pi is a $35 credit-card sized computer with many applications, such as in desktop computing, audio and video playback, and as a controller in many industrial, commercial and domestic applications. This book is about the Raspberry Pi computer and its use in control applications. The book explains in simple terms, with examples, how to configure the RPi, how to install and use the Linux operating system, how to write programs using the Python programming language and how to develop hardware based projects. The book starts with an introduction to the Raspberry Pi computer and covers the topics of purchasing all the necessary equipment and installing/using the Linux operating system in command mode. Use of the user-friendly graphical desktop operating environment is explained using example applications. The RPi network interface is explained in simple steps and demonstrates how the computer can be accessed remotely from a desktop or a laptop computer. The remaining parts of the book cover the Python programming language, hardware development tools, hardware interface details, and RPi based hardware projects. All the 23 projects given in the book have been tested and are working. The following headings are given for each project: Project title Project description Project block diagram Project circuit diagram Project program description using the Program Description Language (PDL) Complete program listing Description of the program The book is ideal for self-study, and is intended for electronic/electrical engineering students, practising engineers, research students, and hobbyists.

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Program, build, and master over 60 projects with Python The Raspberry Pi 5 is the latest single-board computer from the Raspberry Pi Foundation. It can be used in many applications, such as in audio and video media centers, as a desktop computer, in industrial controllers, robotics, and in many domestic and commercial applications. In addition to the well-established features found in other Raspberry Pi computers, the Raspberry Pi 5 offers Wi-Fi and Bluetooth (classic and BLE), which makes it a perfect match for IoT as well as in remote and Internet-based control and monitoring applications. It is now possible to develop many real-time projects such as audio digital signal processing, real-time digital filtering, real-time digital control and monitoring, and many other real-time operations using this tiny powerhouse. The book starts with an introduction to the Raspberry Pi 5 computer and covers the important topics of accessing the computer locally and remotely. Use of the console language commands as well as accessing and using the desktop GUI are described with working examples. The remaining parts of the book cover many Raspberry Pi 5-based hardware projects using components and devices such as LEDs and buzzers LCDs Ultrasonic sensors Temperature and atmospheric pressure sensors The Sense HAT Camera modules Example projects are given using Wi-Fi and Bluetooth modules to send and receive data from smartphones and PCs, and sending real-time temperature and atmospheric pressure data to the cloud. All projects given in the book have been fully tested for correct operation. Only basic programming and electronics experience are required to follow the projects. Brief descriptions, block diagrams, detailed circuit diagrams, and full Python program listings are given for all projects described.

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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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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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A Beginner's Guide to AI and Edge Computing Artificial Intelligence (AI) is now part of our daily lives. With companies developing low-cost AI-powered hardware into their products, it is now becoming a reality to purchase AI accelerator hardware at comparatively very low costs. One such hardware accelerator is the Hailo module which is fully compatible with the Raspberry Pi 5. The Raspberry Pi AI Kit is a cleverly designed hardware as it bundles an M.2-based Hailo-8L accelerator with the Raspberry Pi M.2 HAT+ to offer high speed inferencing on the Raspberry Pi 5. Using the Raspberry Pi AI Kit, you can build complex AI-based vision applications, running in real-time, such as object detection, pose estimation, instance segmentation, home automation, security, robotics, and many more neural network-based applications. This book is an introduction to the Raspberry Pi AI Kit, and it is aimed to provide some help to readers who are new to the kit and wanting to run some simple AI-based visual models on their Raspberry Pi 5 computers. The book is not meant to cover the detailed process of model creation and compilation, which is done on an Ubuntu computer with massive disk space and 32 GB memory. Examples of pre-trained and custom object detection are given in the book. Two fully tested and working projects are given in the book. The first project explains how a person can be detected and how an LED can be activated after the detection, and how the detection can be acknowledged by pressing an external button. The second project illustrates how a person can be detected, and how this information can be passed to a smart phone over a Wi-Fi link, as well as how the detection can be acknowledged by sending a message from the smartphone to your Raspberry Pi 5.

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Die chinesische Firma Espressif Systems hat den neuen Mikrocontroller ESP32 entwickelt, das Nachfolgemodell des ESP8266-WiFi-Chips. Zusätzlich zu allen ESP8266-Funktionen stellt der ESP32 nun Bluetooth-Funk, einen größeren SRAM-Datenspeicher, mehr GPIOs, mehr Schnittstellen, einen Touch-Sensor, einen Temperatursensor, höhere CPU-Geschwindigkeit, einen CAN-Bus, ADCs mit höherer Auflösung, DACs und Sicherheitsfunktionen bereit. Der ESP32 ist Arduino-kompatibel. Dieses Buch ist eine Einführung in den ESP32-Prozessor und beschreibt die wichtigsten Hardware- und Software-Features dieses Chips. Das Hauptziel des Buches ist es, dem Leser zu vermitteln, wie man ESP32-Hard- und Software in praktischen Projekten einsetzt, vor allem durch Verwendung des hochmodernen ESP32-Entwicklungsboards. Im Buch sind viele einfache, grundlegende und weitere Projekte mittlerer Schwierigkeit auf Basis des Entwicklungsboards ESP32 DevKitC samt der beliebten Arduino-IDE und der Programmiersprache MicroPython enthalten. Die Projekte sind nach aufsteigender Komplexität organisiert.

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Der OWON HDS2202s ist ein tragbarer 3-in-1-Multifunktionstester, der als 2-Kanal-Oszilloskop mit einer Bandbreite von 200 MHz, Multimeter und Signalgenerator verwendet werden kann. Es verfügt über ein kontrastreiches 3,5-Zoll-Farbdisplay, das sich für die Wartung von Außenanlagen, schnelle Messungen vor Ort, die Wartung von Kraftfahrzeugen und die Stromerkennung eignet. usw.Funktionen Oszilloskop + Multimeter + Wellenformgenerator, Multifunktion in einem 3,5 Zoll hochauflösendes, kontrastreiches Farb-LCD-Display, geeignet für den Außenbereich 18650-Lithiumbatterie, kann 3–6 Stunden lang ununterbrochen arbeiten USB-Typ-C-Schnittstelle, unterstützt Powerbank, unterstützt PC-Software-Verbindung Selbstkalibrierungsfunktion SCPI unterstützt, erleichtert die sekundäre Entwicklung Technische Daten Bandwidth 100 MHz Channels 2-ch Oscilloscope + 1-ch Generator Sample Rate 1 GSa/s Acquisition Model Normal, Peak detect Record Length 8K Display 3.5-inch LCD Waveform Refresh Rate 10,000 wfrms/s Input Coupling DC, AC, and Ground Input Impedance 1 MΩ ±2%, in parallel with 16pF ±10pF Probe Attenuation Factors 1X,10X,100X,1000X,10000X Max. input Voltage 400 V (DC+AC, PK-PK, 1MΩ input impedance) (10:1 probe attenuation) Bandwidth Limit (typical) 20 MHz Horizontal Scale 2ns/div - 1000s/div, step by 1 - 2 - 5 Vertical Sensitivity 10mV/div - 10V/div Vertical Resolution 8 bits Trigger Type Edge Trigger Modes Auto, Normal, single Automatic Measurement Frequency, Period, Amplitude, Max, Min, Mean, PK-PK Cursor Measurement ΔV, ΔT, ΔT&ΔV between cursors Communication Interface USB Type-C Multimeter Specifications Max. Resolution 20,000 counts Testing Mode Voltage, Current, Resistance, Capacitance, Diode, and Continuity test Input Impedance 10 MΩ Max Input Voltage AC 750 V, DC 1000 V Max Input Current DC: 10 A, AC: 10 A Diode 0-2 V Waveform Generator Specifications Frequency Output Sine 0.1 Hz - 25 MHz Square 0.1 Hz - 5MHz Ramp 0.1 Hz - 1 MHz Pulse 0.1 Hz - 5 MHz Arbitrary 0.1 Hz - 5 MHz Sampling Rate 125 MSa/s Channel 1-ch Amplitude Range (high impedance) 20 mVpp - 5 Vpp Waveform Length 8K Vertical Resolution 14 bits Output Impedance 50Ω Lieferumfang 1x OWON HDS2202s 1x Netzteil 1x USB-Kabel 1x Passive Sonden 2x Krokodilklemmenkabel 1x Satz Multimeter-Sonden (eine rote und eine schwarze) 1x Manual 1x Sondenkorrektur-Einstellmesser Downloads User Manual Specifications SCPI Protocol Quick Guide Software

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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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This book covers a series of exciting and fun projects for the Arduino, such as a silent alarm, people sensor, light sensor, motor control, internet and wireless control (using a radio link). Contrary to many free projects on the internet all projects in this book have been extensively tested and are guaranteed to work! You can use it as a projects book and build more than 45 projects for your own use. The clear explanations, schematics, and pictures of each project make this a fun activity. The pictures are taken of a working project, so you know for sure that they are correct. You can combine the projects in this book to make your own projects. To facilitate this, clear explanations are provided on how the project works and why it has been designed the way it has That way you will learn a lot about the project and the parts used, knowledge that you can use in your own projects. Apart from that, the book can be used as a reference guide. Using the index, you can easily locate projects that serve as examples for the C++ commands and Arduino functionality. Even after you’ve built all the projects in this book, it will still be a valuable reference guide to keep next to your PC.

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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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