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The short-wave technique has a very particular appeal: It can easily bridge long distances. By reflecting short-wave signals off the conductive layers of the ionosphere, they can be received in places beyond the horizon and therefore can reach anywhere on earth. Although technology is striving for ever higher frequencies, and radio is usually listened to on FM, DAB+, satellite or the Internet, modern means of transmission require extensive infrastructure and are extremely vulnerable. In the event of a global power outage, there is nothing more important than the short-wave. Amateur radio is not only a hobby, it’s also an emergency radio system! Elektor’s SDR-Shield is a versatile shortwave receiver up to 30 MHz. Using an Arduino and the appropriate software, radio stations, morse signals, SSB stations, and digital signals can be received. In this book, successful author and enthusiastic radio amateur, Burkhard Kainka describes the modern practice of software defined radio using the Elektor SDR Shield. He not only imparts a theoretical background but also explains numerous open source software tools.

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Fully updated for Raspberry Pi 5 Raspberry Pi is a small, clever, British-built computer that's packed with potential. Made using a desktop-class, energy-efficient processor, Raspberry Pi is designed to help you learn coding, discover how computers work, and build your own amazing things. This book was written to show you just how easy it is to get started. Learn how to: Set up your Raspberry Pi, install its operating system, and start using this fully functional computer. Start coding projects, with step-by-step guides using the Scratch 3, Python, and MicroPython programming languages. Experiment with connecting electronic components, and have fun creating amazing projects. New in the 5th edition: Updated for the latest Raspberry Pi computers: Raspberry Pi 5 and Raspberry Pi Zero 2 W. Covers the latest Raspberry Pi OS. Includes a new chapter on the Raspberry Pi Pico. Downloads GitHub

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Get started with microcontroller based electronics This Arduino-compatible bundle contains the Motherboard, Digitiser, Sensor Array and RGB Matrix. With these 4 boards you have everything you need to build a clock, score counter, timer, task reminder, thermometer, humidity display, sound meter, light meter, clap trigger, colored bar graph display, animated alarm, and much more! The Motherboard has a built in real time clock module that keeps time even when unplugged. The Digitiser can display 4 digits or characters and includes 2 buttons and a potentiometer to let you control what’s being displayed, or the brightness of the display. The Sensor Array can read temperature, relative humidity, sound and light, with an SD card slot for data recording. The RGB Matrix has 16 RGB LEDs that are controlled through shift registers, so only use 3 or 4 pins of the Motherboard. Motherboard The Motherboard is an Arduino-compatible microcontroller breakout board designed around the ATmega328P. The board comes in a solder-it-yourself kit with all the components you need to get started with microcontroller based electronics. All other boards connect to this. Based on the ATmega328P Arduino compatible On-Board RTC (Real Time Clock) FTDI Header for easy programming Bluetooth Header Terminal Block Connections Digitiser The Digitiser is a versatile display and input board. It let’s you visualise your data. Show your sensor information, clock digits, or even keep score for your favourite card game. The Digitiser also includes some buttons and a knob to let you take control. 4x 7-Segment Displays Uses 595 Shift Registers 2 Switches and a Potentiometer 4 colored 'Mode' LEDs Chainable with other 595 Boards Terminal Block Connections Sensor Array As the name suggests, the Sensor Array is an array of sensors. Measure temperature and relative humidity via the DHT11, light via the light dependant resistor, and sound via the microphone and amplifier circuit. Then you can log the data using the on-board SD card slot. DHT11 Temp & Humidity Sensor Microphone and Amplifier Circuit Light Dependent Resistor MicroSD Slot for Saving Data Logic Level Converter Circuit Terminal Block Connections RGB Matrix Add color to your project by controlling 16 red, 16 green and 16 blue LEDs with just 3 pins of your microcontroller. The RGB Matrix uses shift registers, a matrix and switching transistors, so there’s plenty to learn and explore. 4x4 (16) RGB LEDs Uses 595 Shift Registers Chainable with other 595 Boards Transistor Switches Terminal Block Connections Downloads (Manuals) Motherboard Digitiser Sensor Array RGB Matrix

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Measuring Does Not Have to be Expensive Low-Cost Audio TesterUsing PC-Based Software and a USB Audio Interface AC Grid Frequency MeterMonitor Mains Frequency and Voltage A Modest Inductance MeterAn Affordable Solution for Your Workbench Acoustic Wave HoveringA Look at the Makerfabs Acoustic Levitation Kit Starting Out in ElectronicsRectifiers E-FFWD: Looking Ahead Again! Get Started With Your OscilloscopeFind Your Way Through the Knobs and Buttons Raspberry Pi Pico Makes an MSF-SDRDecode a Time Signal with a Pi Pico SDR Moisture Sensors for Watering SystemsAutomatic Watering Disruption in Test and Measurement EquipmentInnovation from the Smaller Players Infographics 7-8/2022 Inspiration, That’s What It’s All AboutInterview with Entrepreneur Walter Arkesteijn, InnoFaith Beauty Sciences Minimizing EMC Interference from Storage Chokes GUIs with Python (Part 5)Tic-Tac-Toe Reed RelaysPeculiar Parts, the series Simple Analog ESR Meter With Moving-Coil Meter Precision Sigfox CO2 Traffic LightNo Wi-Fi Network Needed! Women in Tech“It's All About Merit Until Merit Has Tits” Low-Budget Tablet Oscilloscope ADS1013DGood Value for Money? Smart Plug TeardownWhich Ones Are Hacker-Friendly? Skin Impedance and Skin CapacitanceSmall Experiments From Life’s ExperienceNo Local Business Pokit Meter ReviewA Swiss army knife of test gear HexadokuThe Original Elektorized Sudoku

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This fiberglass outdoor antenna is optimized for receiving signals in the 868 MHz ISM band, supporting technologies such as Sigfox, LoRa, Mesh Networks, and Helium. The antenna consists of a half-wave dipole with 4.4 dBi gain, encapsulated inside a fiberglass radome with an aluminum mounting base. Specifications Frequency 868-870 MHz Antenna type Dipole 1/2 wave Connector N female Installation type Mast Diam 35-60 mm (mounting bracket included) Gain 4.4 dBi SWR ≤1.5 Type of Polarization Vertical Maximum power 10 W Impedance 50 Ohms Dimensions 52.5 cm Tube diameter 26 mm Base antenna 32 mm Operating temperature −30°C to +60°C Included ISM Band Antenna (868 Mhz) Mast bracket (for installation on a 35 to 60 mm diameter mast)

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