The tripod adapter is custom machined from a solid block of aluminum, and provides two standard tripod mounting points with 3/8-16 and light-duty 1/4-20 thread respectively. This allows you to mount the AxiDraw to a tripod, should you have reason to do so. We would highly recommend using a sturdy tripod with a 3/8-16 connection point and appropriate counterweight (sand bag, lifting weights, etc) to balance the weight of the AxiDraw while in use. Installation is straightforward, and does not require any tools other than those included with AxiDraw: Remove the existing foot pads from the AxiDraw (either standard or outrigger feet, depending on model) and attach this plate to the captured nuts in the bottom surface of the AxiDraw. For AxiDraw SE/A3 (April 2019 and newer), the tripod adapter attaches directly to tapped holes in the base of the machine. This heavy-duty tripod adapter is compatible with AxiDraw V3, AxiDraw V3/A3 and AxiDraw V3 XLX. It is also compatible with AxiDraw SE/A3 manufactured in April 2019 and newer. Specifications Material: Anodized 6061-T6 aluminum Size: 3.90 x 2.36 x 0.35 inches (99.1 x 60 x 8.3 mm) Weight: Approximately 144 g Mounting hardware: included (four M4x10 high-strength steel mounting screws)
This rigid end effector plate is designed to be in place of the standard AxiDraw pen-lift Z stage, and provides an alternative mounting scheme for mounting various things to the end of the AxiDraw's arm, for applications where greater rigidity is important but the lifting ability of the standard Z stage is not required. The rigid end effector is custom machined from aluminum, and provides six M3 tapped holes and two M4 tapped holes for mounting what ever it is that you would like to mount to the end of the AxiDraw, to use it as a 2D robot arm. The hole pattern is compatible with the AxiDraw pen clip, so you can, if you like, mount the AxiDraw's pen clip to this end effector. Installation is straightforward, but requires a Pozidrive PZ2 screwdriver, not included*. Remove the AxiDraw's pen clip, and then remove the pen-lift Z stage by removing two screws with the PZ2 screwdriver. Install the rigid end effector plate in its place, using the two included mounting screws and the PZ2 screwdriver. You may wish to also tie back or fully remove the AxiDraw's cable guides, which normally extend to power the pen-lift stage. Specifications Material: Anodized 6061-T6 aluminum Size: 1.97 x 1.38 x 0.19 inches (50 x 35 x 4.8 mm) Weight: Approximately 11 g Mounting hardware: included (Two M4x12 pozidrive-head self-tapping screws) Compatibility All AxiDraw V3 family pen plotters AxiDraw V3/A3 AxiDraw SE/A3 AxiDraw MiniKit models
Extra easel boards for AxiDraw V3/A3 can be used as replacements, or for staging additional workpieces for quickly swapping to the next plot. This set consists of one 11.75 x 17 inch (29.85 x 43.18 cm) hardboard platen with rubber feet attached, plus eight micro binder clips.
PiKVM V3 is een open-source op Raspberry Pi-gebaseerde KVM over IP toepassing. Het helpt je om servers of werkstations op afstand te beheren, ongeacht de toestand van het besturingssysteem en ongeacht of het al dan niet geïnstalleerd is.
Met PiKVM V3 kun je je computer aan/uit zetten of herstarten, de UEFI/BIOS configureren, en zelfs het OS opnieuw installeren met de virtuele CD-ROM of flash drive. Je kunt je toetsenbord en muis op afstand bedienen of PiKVM kan een toetsenbord, muis en een monitor simuleren, die dan in een web browser worden getoond alsof je rechtstreeks op een systeem op afstand werkt.
Features
HDMI Full HD capture op basis van de TC358743 chip (extra lage latentie ~100 ms en veel functies zoals compressieregeling).
OTG toetsenbord en muis; emulatie van drives voor data opslag.
Mogelijkheid om een USB "verwijderen en insteken" te simuleren.
ATX voedingsregeling op de kaart
Ventilatorregelaar aan boord
Real-time klok (RTC)
RJ-45 en USB seriële consolepoort (om PiKVM OS te beheren of om verbinding te maken met de server).
Optionele op AVR gebaseerde HID (voor zeldzame en ongebruikelijke moederborden waarvan de BIOS het OTG geëmuleerde toetsenbord niet herkent).
Optioneel OLED scherm om de netwerk status of andere gewenste informatie te tonen.
Kant-en-klaar board. Je hoeft niet te solderen of een breadboard te gebruiken.
PiKVM OS – de software is volledig open source.
Inbegrepen
PiKVM V3 HAT voor Raspberry Pi 4
USB-C bridge board – om de HAT via USB-C met de Pi te verbinden
ATX controller adapter bord en bedrading – om de HAT met het moederbord te verbinden (als je de stroomvoorziening via hardware wilt regelen).
2 platte CSI-kabels
Schroeven en messing afstandhouders
Benodigdheden
Raspberry Pi 4
MicroSD-kaart
USB-C naar USB-A kabel
HDMI-kabel
Straight Ethernet-kabel (voor de ATX uitbreidingskaart aansluiting)
Voeding (5,1 V/3 A USB-C, officiele RPi voeding wordt aanbevolen)
Downloads
Gebruikershandleiding
Images
GitHub
Links
Het PiKVM-project en de ervaringen van de ontwikkelaar: Een interview met Maxim Devaev
Raspberry Pi als KVM-afstandsbediening
Space, the final frontier, will become more and more popular. The space industry is continually growing and new products and services will be required. Innovation is needed for the development of this industry. Today it is no longer possible to follow all the events in field of space. The space market is growing and activities are increasing, especially the market for small-satellites.
This book wants to help close the gap and encourage electronic engineers to enter into the fascinating field of space electronics. One of the main difficulties is finding people with knowledge of space electronics design. Nowadays companies have to invest a lot of time and resources to instruct electronic engineers with no experience of space. Only a brief and basic introduction of this topic is typically achieved at university in space engineering lectures. Professionals with practical experience and the necessary theoretical knowledge are scarce. Companies from the space sector are searching for staff with knowledge of space electronics.
This book will bring space closer aspiring to the space electronic hobbyists.
Program and Build Raspberry Pi 5 Based Ham Station Utilities with the RTL-SDR
The RTL-SDR devices (V3 and V4) have gained popularity among radio amateurs 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, a Raspberry Pi 5 computer, a USB based external audio input-output adapter, and software installed on the Raspberry Pi 5 computer. With such a modest setup, it is possible to receive signals from around 24 MHz to over 1.7 GHz.
This book is aimed at amateur radio enthusiasts and electronic engineering students, as well as at anyone interested in learning to use the Raspberry Pi 5 to build electronic projects. The book is suitable for both beginners through experienced readers. Some knowledge of the Python programming language is required to understand and eventually modify the projects given in the book. A block diagram, a circuit diagram, and a complete Python program listing is given for each project, alongside a comprehensive description.
The following popular RTL-SDR programs are discussed in detail, aided by step-by-step installation guides for practical use on a Raspberry Pi 5:
SimpleFM
GQRX
SDR++
CubicSDR
RTL-SDR Server
Dump1090
FLDIGI
Quick
RTL_433
aldo
xcwcp
GPredict
TWCLOCK
CQRLOG
klog
Morse2Ascii
PyQSO
Welle.io
Ham Clock
CHIRP
xastir
qsstv
flrig
XyGrib
FreeDV
Qtel (EchoLink)
XDX (DX-Cluster)
WSJT-X
The application of the Python programming language on the latest Raspberry Pi 5 platform precludes the use of the programs in the book from working on older versions of Raspberry Pi computers.
Practical Introduction to 3D Modeling from Enclosure to Front Panel
Embedding a vintage component, creating a professional looking home for a circuit board, or even designing a complex apparatus complete with a chassis – these and many other challenges turn into a stimulating pleasure with FreeCAD. Once you have internalized the basic processes, there are virtually no limits to your imagination.
Starting to use a new software is never straightforward – especially with a tool as versatile as FreeCAD. Manageable, but at the same time easily usable individual components provide the starting point in this book. Putting these components together later results in assemblies.
In the FreeCAD universe, a workable trajectory is demonstrated. The described procedure is illustrative so the examples are easily applied to custom tasks. The devices were made by the author and illustrated with photos.
Creating a 3D design is requiring some effort but the initial investment pays off soon. Besides the impressive spatial representation of the projects, the extracted drawings yield a solid base for documentation and production. Extended FreeCAD capabilities like the unfolding of sheet metal parts enormously add to efficiency and pushes models forward into practical assembly.
Soon you will definitely not want to do without FreeCAD!
Example projects with Node-RED, MQTT, WinCC SCADA, Blynk, and ThingSpeak
This comprehensive guide unlocks the power of Modbus TCP/IP communication with Arduino. From the basics of the Modbus protocol right up to full implementation in Arduino projects, the book walks you through the complete process with lucid explanations and practical examples.
Learn how to set up Modbus TCP/IP communication with Arduino for seamless data exchange between devices over a network. Explore different Modbus functions and master reading and writing registers to control your devices remotely. Create Modbus client and server applications to integrate into your Arduino projects, boosting their connectivity and automation level.
With detailed code snippets and illustrations, this guide is perfect for beginners and experienced Arduino enthusiasts alike. Whether you‘re a hobbyist looking to expand your skills or a professional seeking to implement Modbus TCP/IP communication in your projects, this book provides all the knowledge you need to harness the full potential of Modbus with Arduino.
Projects covered in the book:
TCP/IP communication between two Arduino Uno boards
Modbus TCP/IP communication within the Node-RED environment
Combining Arduino, Node-RED, and Blynk IoT cloud
Interfacing Modbus TCP/IP with WinCC SCADA to control sensors
Using MQTT protocol with Ethernet/ESP8266
Connecting to ThingSpeak IoT cloud using Ethernet/ESP8266
Analogue Electronics and Microcontrollers Projects
Hobbyist electronics can be a fun way to learn new skills that can be helpful to your career. Those who understand the basics of electronics can design their own circuits and projects. However, before you run, you need to learn to walk.
It all starts with analogue electronics. You should be familiar with the simple components and circuits and understand their basic behaviors and the issues you may encounter. The best way to do this is through real experiments. Theory alone is not enough. This book offers a large number of practical entry-level circuits, with which everyone can gain the basic experience.
Through the widespread introduction of microcontrollers, a new chapter in electronics has begun. Microcontrollers are now performing more and more tasks that were originally solved using discrete components and conventional ICs. Starting out has become easier and easier thanks to platforms including Bascom, Arduino, micro:bit. The book introduces numerous manageable microcontroller applications. It’s now a case of less soldering and more programming.
Practical Multitasking Fundamentals
Programming embedded systems is difficult because of resource constraints and limited debugging facilities. Why develop your own Real-Time Operating System (RTOS) as well as your application when the proven FreeRTOS software is freely available? Why not start with a validated foundation?
Every software developer knows that you must divide a difficult problem into smaller ones to conquer it. Using separate preemptive tasks and FreeRTOS communication mechanisms, a clean separation of functions is achieved within the entire application. This results in safe and maintainable designs.
Practicing engineers and students alike can use this book and the ESP32 Arduino environment to wade into FreeRTOS concepts at a comfortable pace. The well-organized text enables you to master each concept before starting the next chapter. Practical breadboard experiments and schematics are included to bring the lessons home. Experience is the best teacher.
Each chapter includes exercises to test your knowledge. The coverage of the FreeRTOS Application Programming Interface (API) is complete for the ESP32 Arduino environment. You can apply what you learn to other FreeRTOS environments, including Espressif’s ESP-IDF. The source code is available from GitHub. All of these resources put you in the driver’s seat when it is time to develop your next uber-cool ESP32 project.
What you will learn:
How preemptive scheduling works within FreeRTOS
The Arduino startup “loopTask”
Message queues
FreeRTOS timers and the IDLE task
The semaphore, mutex, and their differences
The mailbox and its application
Real-time task priorities and its effect
Interrupt interaction and use with FreeRTOS
Queue sets
Notifying tasks with events
Event groups
Critical sections
Task local storage
The gatekeeper task
Program and build Arduino-based ham station utilities, tools, and instruments
In addition to a detailed introduction to the exciting world of the Arduino microcontroller and its many variants, this book introduces you to the shields, modules, and components you can connect to the Arduino. Many of these components are discussed in detail and used in the projects included in this book to help you understand how these components can be incorporated into your own Arduino projects. Emphasis has been placed on designing and creating a wide range of amateur radio-related projects that can easily be built in just a few days.
This book is written for ham radio operators and Arduino enthusiasts of all skill levels, and includes discussions about the tools, construction methods, and troubleshooting techniques used in creating amateur radio-related Arduino projects. The book teaches you how to create feature-rich Arduino-based projects, with the goal of helping you to advance beyond this book, and design and build your own ham radio Arduino projects.
In addition, this book describes in detail the design, construction, programming, and operation of the following projects:
CW Beacon and Foxhunt Keyer
Mini Weather Station
RF Probe with LED Bar Graph
DTMF Tone Encoder
DTMF Tone Decoder
Waveform Generator
Auto Power On/Off
Bluetooth CW Keyer
Station Power Monitor
AC Current Monitor
This book assumes a basic knowledge of electronics and circuit construction. Basic knowledge of how to program the Arduino using its IDE will also be beneficial.
