Program and build RPi-based ham station utilities, tools, and instruments Although much classical HF and mobile equipment is still in use by many amateurs, the use of computers and digital techniques has now become very popular among amateur radio operators. Nowadays, anyone can purchase a Raspberry Pi computer and run almost all amateur radio software on the ‘RPi’, which is slightly bigger than the size of a credit card. The RTL-SDR devices have become very popular among hams because of their very low cost and rich features. A basic system may consist of a USB-based RTL-SDR device (dongle) with a suitable antenna, an RPi computer, a USB-based external audio input-output adapter, and software installed on the Pi. With such a simple setup it is feasible to receive signals from around 24 MHz to over 1.7 GHz. With the addition of a low-cost upconverter device, an RTL-SDR can easily and effectively receive the HF bands. This book is aimed at amateur radio enthusiasts, electronic engineering students, and anyone interested in learning to use the Raspberry Pi to build electronic projects. The book is suitable for the full range of beginners through old hands at ham radio. Step-by-step installation of the operating system is described with many details on the commonly used Linux commands. Some knowledge of the Python programming language is required to understand and modify the projects given in the book. Example projects developed in the book include a station clock, waveform generation, transistor amplifier design, active filter design, Morse code exerciser, frequency counter, RF meter, and more. The block diagram, circuit diagram, and complete Python program listings are given for each project, including the full description of the projects. Besides wide coverage of RTL-SDR for amateur radio, the book also summarizes the installation and use instructions of the following ham radio programs and software tools you can run on your Raspberry Pi: TWCLOCK, Klog, Gpredict, FLDIGI, DIRE WOLF, xcwcp, QSSTV, LinPsk, Ham Clock, CHIRP, xastir, and CQRLOG.
This book is about teaching the Python programming language using the Raspberry Pi 4 computer. The book makes an introduction to Raspberry Pi 4 and then teaches Python with the topics: variables, strings, arrays, matrices, tuples, lists, dictionaries, user functions, flow of control, printing, keyboard input, graphics, GUI, object oriented programming and many more topics.The book is aimed for beginners, students, practising engineers, hobbyists, and for anyone else who may want to learn to program in Python.The book includes many example programs and case studies. All the example programs and case studies have been tested fully by the author and are all working. The example programs aim to teach the various programming concepts of Python. The case studies cover the use of Python in the analysis and design of electronic circuits. Some of the case study topics are:
Resistor colour code identification
Resistive potential divider circuits
Resistive attenuator design
Zener diode voltage regulator design
RC and RLC transient circuits
Circuit frequency response
Saving data on external memory stick
Mesh and node circuit analysis using matrices
Resonance in RLC circuits
Transistor Biasing analysis
Transistor amplifier design
Design of active filters
Interfacing hardware with GPIO, I²C and SPI
Using Wi-Fi with Python and TCP/IP and UDP programs
Using Bluetooth from Python
Full program listings of all the programs used in the book are available at the Elektor website of the book. Readers should be able just to copy and use these programs in their Raspberry Pi projects without any modifications.
A comprehensive course that will teach you how to build a modern IoT application This book will take you on a whirlwind tour of full-stack web application development using Raspberry Pi. You will learn how to build an application from the ground up. You will gain experience and know-how of technologies including: The Linux operating system and command line. The Python programming language. The Raspberry Pi General Purpose Input Output pins (GPIOs). The Nginx web server. Flask Python web application microframework. JQuery and CSS for creating user interfaces. Dealing with time zones. Creating charts with Plotly and Google Charts. Data logging with Google Sheet. Developing applets with IFTTT. Securing your application with SSL. Receiving SMS notifications to your phone using Twilio. This book will also teach you how to set up a remote wireless Arduino sensor node and collect data from it. Your Raspberry Pi web application will be able to process Arduino node data in the same way it processes data from its onboard sensor. Raspberry Pi Full Stack will teach you many skills essential to building Web and Internet of Things applications. The application you will build in this project is a platform that you can extend upon. This is just the start of what you can do with a Raspberry Pi and the software and hardware components that you will learn about. This book is supported by the author via a dedicated discussion space.
This book is about DC electric motors and their use in Arduino and Raspberry Pi Zero W based projects. The book includes many tested and working projects where each project has the following sub-headings: Title of the project Description of the project Block diagram Circuit diagram Project assembly Complete program listing of the project Full description of the program The projects in the book cover the standard DC motors, stepper motors, servo motors, and mobile robots. The book is aimed at students, hobbyists, and anyone else interested in developing microcontroller based projects using the Arduino Uno or the Raspberry Pi Zero W. One of the nice features of this book is that it gives complete projects for remote control of a mobile robot from a mobile phone, using the Arduino Uno as well as the Raspberry Pi Zero W development boards. These projects are developed using Wi-Fi as well as the Bluetooth connectivity with the mobile phone. Readers should be able to move a robot forward, reverse, turn left, or turn right by sending simple commands from a mobile phone. Full program listings of all the projects as well as the detailed program descriptions are given in the book. Users should be able to use the projects as they are presented, or modify them to suit to their own needs.
This color-coded pin header is ideal for use with Raspberry Pi. All pins are color-coded with corresponding functions making prototyping and hacking easier. Specifications Suitable for all Raspberry Pi models with GPIO 2 pin rows with 20 pins each 2.54 mm pin spacing (pitch) Pin height: 3 / 6 mm Total height: approx. 11 mm Colors/Functions Orange = 3.3 V Red = 5 V Pink = I²C Purple = UART Blue = SPI Yellow = DNC Green = GPIO Black = GND (Ground)
Multitasking and multiprocessing have become a very important topic in microcontroller-based systems, namely in complex commercial, domestic, and industrial automation applications. As the complexity of projects grows, more functionalities are demanded from the projects. Such projects require the use of multiple inter-related tasks running on the same system and sharing the available resources, such as the CPU, memory, and input-output ports. As a result of this, the importance of multitasking operations in microcontroller-based applications has grown steadily over the last few years. Many complex automation projects now make use of some form of a multitasking kernel.This book is project-based and its main aim is to teach the basic features of multitasking using the Python 3 programming language on Raspberry Pi. Many fully tested projects are provided in the book using the multitasking modules of Python. Each project is described fully and in detail. Complete program listings are given for each project. Readers should be able to use the projects as they are, or modify them to suit their own needs.The following Python multitasking modules have been described and used in the projects:
Fork
Thread
Threading
Subprocess
Multiprocessing
The book includes simple multitasking projects such as independently controlling multiple LEDs, to more complex multitasking projects such as on/off temperature control, traffic lights control, 2-digit, and 4-digit 7-segment LED event counter, reaction timer, stepper motor control, keypad based projects, car park controller, and many more. The fundamental multitasking concepts such as process synchronization, process communication, and memory sharing techniques have been described in projects concerning event flags, queues, semaphores, values, and so on.
3rd Edition – Fully updated for Raspberry Pi 4The Raspberry Pi is a very cheap but complete computer system that allows all sorts of electronics parts and extensions to be connected. This book addresses one of the strongest aspects of the Raspberry Pi: the ability to combine hands-on electronics and programming.Combine hands-on electronics and programmingAfter a short introduction to the Raspberry Pi you proceed with installing the required software. The SD card that can be purchased in conjunction with this book contains everything to get started with the Raspberry Pi. At the side of the (optional) Windows PC, software is used which is free for downloading. The book continues with a concise introduction to the Linux operating system, after which you start programming in Bash, Python 3 and Javascript. Although the emphasis is on Python, the coverage is brief and to the point in all cases – just enabling you to grasp the essence of all projects and start adapting them to your requirements. All set, you can carry on with fun projects.The book is ideal for self-studyNo fewer than 45 exciting and compelling projects are discussed and elaborated in detail. From a flashing lights to driving an electromotor; from processing and generating analog signals to a lux meter and a temperature control. We also move to more complex projects like a motor speed controller, a web server with CGI, client-server applications and Xwindows programs.Each project has details of the way it got designed that wayThe process of reading, building, and programming not only provides insight into the Raspberry Pi, Python, and the electronic parts used, but also enables you to modify or extend the projects any way you like. Also, feel free to combine several projects into a larger design.
Ready to explore the world around you? By attaching the Sense HAT to your Raspberry Pi, you can quickly and easily develop a variety of creative applications, useful experiments, and exciting games.The Sense HAT contains several helpful environmental sensors: temperature, humidity, pressure, accelerometer, magnetometer, and gyroscope. Additionally, an 8x8 LED matrix is provided with RGB LEDs, which can be used to display multi-color scrolling or fixed information, such as the sensor data. Use the small onboard joystick for games or applications that require user input. In Innovate with Sense HAT for Raspberry Pi, Dr. Dogan Ibrahim explains how to use the Sense HAT in Raspberry Pi Zero W-based projects. Using simple terms, he details how to incorporate the Sense HAT board in interesting visual and sensor-based projects. You can complete all the projects with other Raspberry Pi models without any modifications.Exploring with Sense HAT for Raspberry Pi includes projects featuring external hardware components in addition to the Sense HAT board. You will learn to connect the Sense HAT board to the Raspberry Pi using jumper wires so that some of the GPIO ports are free to be interfaced to external components, such as to buzzers, relays, LEDs, LCDs, motors, and other sensors.The book includes full program listings and detailed project descriptions. Complete circuit diagrams of the projects using external components are given where necessary. All the projects were developed using the latest version of the Python 3 programming language. You can easily download projects from the book’s web page. Let’s start exploring with Sense HAT.
Features Simple slide angle adjustment Camera Module protection 'sandwich' plates Made from crystal clear laser-cut acrylic in the UK 1/4 inch hole for tripod mounting Stable 4-leg base Here you can find the Assembly Instructions.
Weatherproof (certified IP55) Fresnel IR lens to optimize motion detection Mount compatible with all models of Raspberry Pi (all A, B, and Zero models) Easy access to the Raspberry Pi’s internal components and ports Can be secured with a padlock Nylon camera attachment strap for securing outside Rear cable access Fasteners and spacers for attaching electronics No soldering required Rear attachments for modular upgrades Please note, you need to provide a Raspberry Pi.
Witty Pi is an add-on board that adds realtime clock and power management to your Raspberry Pi. It can define your Raspberry Pi’s ON/OFF sequence, and significantly reduce the energy usage. Witty Pi 4 is the fourth generation of Witty Pi and it has these hardware resources onboard: Factory calibrated and temperature compensated realtime clock with ±2 ppm accuracy. Dedicated temperature sensor with 0.125 °C resolution. On-board DC/DC converter that accepts up to 30 V DC. AVR 8-bit microcontroller (MCU) with 8 KB programmable flash. Accurate realtime clock and ON/OFF scheduling The realtime clock (RTC) on Witty Pi 4 has been calibrated in the factory and Witty Pi 4’s firmware also makes temperature compensation for the crystal. This makes the RTC very accurate and the actual annual error is limited within ±2 ppm. When your Raspberry Pi boots up, the time stored in the RTC will overwrite the system time. As a result, your Raspberry Pi knows the correct time even without accessing the Internet. You can schedule the startup and/or shutdown of your Raspberry Pi, and make it a time-controlled device. You can even define a schedule script to schedule complicated ON/OFF sequence for your Raspberry Pi. Scheduling the ON/OFF sequence for Raspberry Pi is the most popular feature of Witty Pi, and it is extremely useful for systems that powered by battery. By only turning on Raspberry Pi when necessary, the battery can be used way much longer with Witty Pi installed. Temperature-controlled device The temperature sensor on Witty Pi 4 has 0.125 °C resolution. The temperature data is used for compensating the crystal and make the RTC more accurate. You can also specific the action (startup or shutdown) when temperature goes above or below the preset threshold. Which means you can also make your Raspberry Pi a temperature-controlled device. DC/DC converter and e-latching power switch Witty Pi 4 comes with a DC/DC converter on board, which allows you to power your device with 6~30V power supply. You can also power your device with 5 V via the USB type C connector. Witty Pi 4 also implements an e-Latching power switch, which is very similar to the power switch on your PC/Laptop computer. You can gracefully turn on/off your Raspberry Pi with a single tap on the button. The software running in background will execute the shutdown command before the power gets cut, this avoid the data corruption caused by hard shutdown. Witty Pi 4 supports all Raspberry Pi models that has the 40-pin GPIO header, including A+, B+, 2B, Zero, Zero W, Zero 2 W, 3B, 3B+, 3A+ and 4B. You will need to solder the 40-pin header to Zero/Zero W/Zero 2 W model beforehand, so they can make reliable connection with Witty Pi. Single I²C device Witty Pi 4 uses MCU to emulate a single I²C device with default address 0x08, and also map all I²C registers in realtime clock and temperature sensor as virtual I²C registers in the same device. You can access all I²C registers in realtime clock and temperature sensor via the single I²C device emulated by Witty Pi 4. The advantage of this new design is that Witty Pi 4 hides other I²C devices (realtime clock, temperature sensor) and becomes the proxy of them to talk to Raspberry Pi. Because the I²C address used by Witty Pi 4 can be changed to any value, you can always avoid the I²C address conflicting. UWI support Witty Pi 4 is fully supported by UWI (UUGear Web Interface), and you can access you Witty Pi 4 on any device that have network access. Specifications Microcontroller ATtiny841 (datasheet) Realtime Clock PCF85063A (datasheet), calibrated in factory Temperature Sensor LM75B (datasheet) DC/DC Converter MP4462 (datasheet) MOSFET Switch AO4616 (datasheet) Battery CR2032 (for time keeping when power supply is disconnected) Power In DC 5 V (via USB type C connector)or DC 6 V~30 V (via XH2.54 connector) Output Current Up to 3 A for Raspberry Pi and its peripherals Standby Current ~0.5 mA Operating Environment Temperature -30°C~80°C (-22°F~176°F)Humidity 0~80% RH, no condensing, no corrosive gas Dimension 65 x 56 x 19 mm Weight 23 g (without accessories) Included 1x Witty Pi 4 board 1x CR2032 battery 4x M2.5 x 11mm Copper Standoff 8x M2.5 screws Downloads User manual GitHub
Features Compatible with Raspberry Pi 4 only
Cutout in lid for 40x30mm heatsink or Fan SHIM
Super-slimline profile Fully HAT-compatible Protects your beloved Pi Clear top and base leave Raspberry Pi 4 visible GPIO cut-out Handy laser-etched port labels Leaves all ports accessible Made from lightweight, high-quality, cast acrylic Great for hacking and tinkering! Made in Sheffield, UK Weighing just over 50 grams, the case is lightweight and ideal for mounting to any surface. No tools are required for assembly or disassembly. The dimensions are: 99 × 66 × 15 mm. In the video below you can see a quick assembly guide.
Time-of-Flight Measuring principle The time-of-flight technology has been successfully established on the market for many years. Nimbus 3D is now making this technology available for the first time for the Raspberry Pi. With time-of-flight technology, the distance between objects and the camera is measured via the light propagation time using modulated light pulses. Applications The compact design opens up a multitude of new applications. From people counting to gesture control to surveying tasks, there is no limit to the imagination. Open source software Together with open-source software and the connection to the Raspberry Pi Linux kernel, Nimbus 3D is a ready out-of-the-box solution. The included sample code for python, javascript and C completes the plug-and-play experience. And best of all: the complete software is open-source! Join the community at github.com and contribute your part to the development of nimbus 3D. Technical specifications Resolution: 352 x 288 Measuring range: 0.1 m - 5 m Angle of view: 66° x 54° (H x V) Framerate: up to 30fps Imager: Infineon REAL3 IRS1125A Output: 3D point cloud, amplitude, radial and confidence
Raspberry Pi 4 was welcomed by the Pi enthusiasts for the increased processing power. However, this came at a price. The RPi 4 can draw up to 3 Amps, which means it has to dissipate 15 W of power. Raspberry Pi cooling is a must. From the simplest passive heat sink, through elaborate fan blowers and even to an exotic water-cooled idea, many options are available.The Smart Fan has the form factor of the Raspberry Pi HAT. Its own tinny 32-bit processor receives commands from Raspberry Pi through the I²C interface. A step-up power supply converts the 5 V provided by Raspberry Pi to 12 V, ensuring precise speed control. Using pulse width modulation, it powers the fan just enough to maintain a constant temperature of the Raspberry Pi processor.The Smart Fan preserves all the GPIO pins, allowing any number of cards to be stacked on top of Raspberry Pi. If another add-on card has to dissipate power, a secondary Smart Fan can be added to the stack.DIN-Rail MountingTogether with multiple add-on cards, the Smart Fan can be installed on the DIN-Rail, for sturdy industrial applications.Stack Level JumperTwo Smart Fans can be installed on top of each Raspberry Pi. The assumption is that you have one more card in the stack which requires cooling. The bottom side of the Smart Fan has a jumper which needs to be installed on the second fan, in order for the Raspberry Pi to differentiate the two I²C addresses.Features
40 x 40 x 10 mm fan with 6 CFM airflow
Step-up 12 V power supply for precise fan speed control
PWM Controller modulates the fan to keep constant Pi temperature
Draws less than 100 mA of power
Stackable to itself, 2 fans can be added to Raspberry Pi
Fully stackable allows adding other cards to Raspberry Pi
Uses only I²C interface, leaves full use of all GPIO pins
Super quiet and efficient
Included
Smart Han HAT
40 x 40 x 10 mm Fan with mounting Screws
Mounting Hardware
Downloads
User's Guide
Open Source Hardware Schematic
2D CAD Drawing
Command line
Python Libraries
Node-Red Nodes
Features Abundant Expandability- You can add a hard drive by merely adding the nylon standoff and acrylic board. The OpenMediaVault includes services such as SSH, (S)FTP, SMB/CIFS, DAAP media servers, RSync, BitTorrent clients. The E-Ink screen makes it more power-efficient. It provides you with an excellent visual experience, which is used to display Raspberry Pi's CPU temperature, CPU usage, disk usage, fan power, etc. Simple product composition, accessories with corresponding numbers, and providing detailed tutorials make it easy to set up. Dual fans and heat sinks installed, working automatically when the CPU temperature exceeds 54 degrees, quickly and effectively solving the heating problem of Raspberry pi motherboard. Specification for E-Ink Working voltage：3.3 V Communication interface： 3-wireSPI, 4-wireSPI Dimensions: 59.2 mm x 29.2 mm x 1.05 mm Display size: 48.55 mm x 23.71 mm Pitch: 0.194 x 0.194 Resolution: 250 x 122 Display color: black and white Gray level: 2 Global refresh: 2s Refresh function: 26.4 Mw (Typ.) Standby power consumption < 0.017 Mw Viewing angle > 170 ° If the manual refresh mode is set, you will need to press OK to refresh. In auto mode, the E-Ink screen will refresh automatically every 500 ms; Package List 1 x NAS HAT 3 x NAS 3 mm transparent acrylic 1 x Micro SD card (8 G) 1 x SATA to USB hard drive cable ( length 0.45 M) 1 x Screwdriver 4 x Silicone Pad 1 x Dual fan 3 x Heat sink 10 x M2 x 12 Screws 10 x M2 Nut 14x M3 x 8 mm Screws 10 x M2.5 x 6 mm Screws 6 x M3 x 26 mm Nylon Standoff 6 x M3 x 13 + 6 mm Single-pass Nylon Standoff 6 x M2.5 x 11 mm Nylon Standoff 6 x M2.5 x 8 + 6 mm single-pass Nylon Standoff NOTE: It is recommended to use the RPi 4B with the SunFounder NAS Kit together, as the USB3.0 interface can provide you with higher file transfer efficiency. The SunFounder NAS Kit currently only supports the expansion of two hard-drive.
This board is the ultimate interface between two cameras and a Raspberry Pi Compute Module. It comes with all the bells and whistles, including Ethernet, dual USB ports, GPIO header, microSD slot, HDMI output, and more. To use this board, you will need your own Raspberry Pi Compute Module, cameras, and camera ribbon cables. Two short power cables already included. Features & Specifications
Raspberry Pi Compatibility: Raspberry Pi Compute Module 1 Raspberry Pi Compute Module 3 Raspberry Pi Compute Module 3 Lite Raspberry Pi Compute Module 3+ 8 GB / 16 GB / 32 GB eMMC flash Raspberry Pi Compute Module 3+ Lite
Dimensions: Width x length: 90 mm x 40 mm Height: 23 mm (standard edition) / 15 mm (slim edition)
Video: Input: two 15-pin CSI-2 camera connectors Output: HDMI
Camera Support: Raspberry Pi camera V1 (OV5647 sensor) Raspberry Pi camera V2 (Sony IMX 219 sensor) HDMI video capture module (single mode, on Toshiba TC358743XBG chip)
Connectivity: GPIO: 40-pin classic Raspberry Pi header USB: 2 x USB Type-A, 1 x USB pin header Ethernet: RJ45 jack
Storage: MicroSD card slot (accessed by Raspberry Pi CM3/3+ Lite)
Power: 5 VDC input via two-pin header Manual power switch
Software: Firmware update via Micro USB connector Runs standard Raspbian Excellent Python support Tons of example code A. boot mode jumper H. dual USB Type-A connector B. camera 1 CSI-2 connector I. HDMI out C. micro USB (for firmware upload) J. USB port pin header D. 5 VDC power connector K. camera 2 CSI-2 connector E. power switch L. 40-pin RPi GPIO header F. microSD slot M. RPi Compute SO-DIMM connector G. RJ45 Ethernet jack
