Resonances From Aether Days
A Pictorial and Technical Analysis from WWII to the Internet Age
From the birth of radio to the late 1980s, much of real life unfolded through shortwave communication. World War II demonstrated—beyond a shadow of a doubt—that effective communications equipment was a vital prerequisite for military success. In the postwar years, shortwave became the backbone on which many of the world's most critical services depended every day.
All the radio equipment—through whose cathodes, grids, plates, and transistors so much of human history has flowed—is an exceptional subject of study and enjoyment for those of us who are passionate about vintage electronics. In this book, which begins in the aftermath of World War II, you’ll find a rich collection of information: descriptions, tips, technical notes, photos, and schematics that will be valuable for anyone interested in restoring—or simply learning about—these extraordinary witnesses to one of the most remarkable eras in technological history.
My hope is that these pages will help preserve this vast treasure of knowledge, innovation, and history—a heritage that far transcends the purely technical.
An illustrated chronicle of Teknology for collectors and restorers
Oscilloscopes have made a major contribution to the advancement of human knowledge, not only in electronics, but in all sciences, whenever a physical quantity can be converted into a timerelated electrical signal.
This book traces the history of a crucial instrument through many Tektronix products. This is the company that invented and patented most of the functions found in all oscilloscopes today. Tek is and will always be synonymous with the oscilloscope.
In nearly 600 pages, with hundreds of gorgeous photos, diagrams, anecdotes, and technical data, you'll travel through the history of Tektronix in a superb collector's edition with a technical point of view. The author is not afraid to get his hands dirty restoring his own Tek equipment. The journey starts in the early 1950s. It ends in the '90s, after exploring the ins and outs of the most interesting models in the 300, 400, 500, 5000, 7000, and 11000 series, from tubes to advanced hybrid technologies.
Downloads
NEW: Free Supplement (136 pages, 401 MB)
The SparkFun Weather Shield uses the Si7021 humidity / temperature sensor, the MPL3115A2 barometric pressure sensor, and the ALS-PT19 light sensor. The shield utilizes the MPL3115A2 and Si7021 Arduino libraries.
The SparkFun Weather Shield comes with two unpopulated RJ11 connector spaces and a 6-pin GPS connector. Finally, each Weather Shield can operate from 3.3 V up to 16 V and has built-in voltage regulators and signal translators.
Check out the GitHub page, Schematics, and Eagle Files for more information.
Jan Didden created Linear Audio in 2010 and published 14 Volumes between 2010 and 2017. Each 200-page Volume contains on average 10 articles by expert authors in the field of audio, acoustics, and instrumentation. Whether you are interested in tube amplifiers, solid-state equipment, loudspeaker design, capacitor and resistor distortion or distortion measurement, you are certain to find helpful advice and interesting discussions. From beginner to advanced level, for the audio professional or the serious hobbyist, this ExpertCollection will advance your understanding and offer new perspectives on common issues. Bonus material included with this collection is a 5-part YouTube series on negative feedback as applied to audio by renowned author Jan Didden, and nine additional landmark audio articles and presentations. If you are seriously interested in audio, acoustics, and instrumentation, you can’t afford to miss this! The published material is indexed and fully searchable and will provide an almost limitless resource for many years to come. You can read about Linear Audio’s authors, and the Table of Contents of each Volume, at linearaudio.net.
Mastering the I²C Bus takes you on an exploratory journey of the I²C Bus and its applications. Besides the Bus protocol, plenty of attention is given to the practical applications and designing a stable system. The most common I²C compatible chip classes are covered in detail.
Two experimentation boards are available that allow for rapid prototype development. These boards are completed by a USB to I²C probe and a software framework to control I²C devices from your computer. All samples programs can be downloaded from the 'Attachments/Downloads' section on this page.
Projects built on Board 1:
USB to I²C Interface, PCA 9534 Protected Input, PCA 9534 Protected Output, PCA 9553 PWM LED Controller, 24xxx EEPROM Module, LM75 Temperature Sensor, PCA8563 Real-time Clock with Battery Backup, LCD and Keyboard Module, Bus Power Supply.
Projects built on Board 2:
Protected Input, Protected Output, LM75 Temperature Sensor, PCF8574 I/O Board, SAA1064 LED Display, PCA9544 Bus Expander, MCP40D17 Potentiometer, PCF8591 AD/DA, ADC121 A/D Converter, MCP4725 D/A Converter, 24xxx EEPROM Module.
This 233-page e-book is packed with Arduino ideas, explanations, tips, diagrams, programs, PCB layouts, and more – enough to provide days of informative, inspiring, and stimulating reading pleasure!
The PDF document includes a table of contents with links to the individual projects, allowing you to easily navigate to the sections you’re most interested in. This way, you can quickly and effortlessly switch between projects and find exactly what you’re looking for.
The JOY-iT DMSO2D72 is your ideal companion for the workshop and outdoor use. It combines a 2-channel oscilloscope, a signal generator for any wave type as well as a multimeter with 6 different measurement types in one device and serves all functions you expect from individual devices.
JOY-iT has placed particular emphasis on simple, clear and practical handling in order to make work as pleasant as possible for the user. For this the DMSOD72 is equipped with a 'one-button' auto measuring function and a 'one-button' page out. In addition, 2 signals can be compared directly on the 2.8' 65K colour LCD display. The power supply is provided by two 18650 lithium batteries, which are included in the scope of supply and allow a continuous operation of one day as well as a standby time of up to 8 weeks. Furthermore, operation via the USB-C interface is also possible, during which the batteries are charged simultaneously.
In order to protect the device perfectly in 'outdoor use', the DMSO2D72 was equipped with a silicone sheath, which offers protection against shocks, dirt and heat. The extensive and very user-friendly software is available in English, German and French and can be switched easily on the device.
You will also be impressed by the PC software, which provides you with a multitude of functions with very high ease of use.
General Specifications
Display type
2.8' 64K color TFT-LCD
Display resolution
320 x 240
Display settings
Adjustable background brightness, backlight duration, auto power off time
Protective case
Silicon cover, good impact resistance, outstanding heat resistance, easy to disassemble
Special features
Mobile use through battery operation, 3-in-1 device (oscilloscope, signal generator, multimeter), 3 languages (German, English, French)
Assembly / Stand function
45° suspension bracket
Interface
USB Type C for power/data
Rechargeable battery
2x 16850 Lithium
Charging current
5 V / 2 A
Battery life
In use: A full dayIn standby: Up to 8 weeks
PC software
Windows 7 and higher
Operating temperature
0-50°C
Dimensions
199 x 98 x 40 mm
Weight
624 g
Oscilloscope
Channels
2 + DMM + AWG
Bandwidth
70 MHz
Sampling Rate
250 MSa/s Single channel125 MSa/s Dual channel
Vertical resolution
10 mV - 10 V
Automatic measurement of
Frequency and amplitude
Manual cursor measurement
Voltage and time
Output impedance (DC)
25 pF ±3 pF; 1 MΩ ±2%
Maximum input voltage
150 V RMS
Signal Generator
Sampling rate
250 MSa/s
Vertical resolution
12 bits
Waveforms
Sine, square, triangle, trapezoid, and many more
Sine
1 Hz - 25 MHz
Square
1 Hz - 10 MHz
Triangle
1 Hz - 1 MHz
Trapezoid
1 Hz - 5 MHz
Frequency resolution
1 Hz
Output impedance
50 Ω
Digital Multimeter
6 Multimeter measuring modes
Voltage, current, resistance, capacity, diode, on-off
Max. resolution
4000 Counts
Ranges
Voltage
0 µV - 600 V DC0 mV - 600 V AC, 40-400 Hz
Current
0 µA - 10 A
Resistance
0 mΩ - 40 MΩ
Capacity
0 pF - 100 µF
Diode
0-2 V
On-off
<50 Ω
Included
JOY-iT 3-in-1 Handheld DMSO2D72
2 rechargeable batteries (18650, 2600 mAh)
Passive 80 MHz Probe + accessories
2x BNC to crocodile clip coaxial cable
2x DMM test lead
USB to USB-C cable
USB power supply (5 V, 2 A)
Downloads
Datasheet
Manual
PC Software 1.1.10
Flash Manual (28-07-2021)
Flash Software
Latest firmware version (13-01-2022)
The QA403 is QuantAsylum's fourth-generation audio analyzer. The QA403 extends the functionality of the QA402 with improved noise and distortion performance, in addition to a flatter response at band edges. The compact size of the QA403 means you can take it just about anywhere.
Features
24-bit ADC/DAC
Up to 192 kSPS
Fully isolated from PC
Differential Input/Output
USB powered
Built-in Attenuator
Fast Bootup and Driverless
The QA403 is a driverless USB device, meaning it’s ready as soon as you plug it in. The software is free and it is quick and easy to move the hardware from one machine to the next. So, if you need to head to the factory to troubleshoot a problem or take the QA403 home for a work-from-home day, you can do it without hassle.
No-Cal Design
The QA403 comes with a factory calibration in its flash memory, ensuring consistent unit-to-unit performance. On your manufacturing line you can install another QA403 and be confident what you read on one unit will be very similar to the next unit. It is not expected that re-calibration will be required at regular intervals.
Measurements
Making basic measurements is quick and easy. In a few clicks you will understand the frequency response, THD(+N), gain, SNR and more of your device-under test.
Dynamic Range
The QA403 offers 8 gain ranges on the input (0 to +42 dBV in 6 steps), and 4 gain ranges on the output (-12 to +18 dBV in 10 dB steps). This ensures consistent performance over very wide ranges of input and output levels. The maximum AC input to the QA403 is +32 dBV = 40 Vrms. The maximum DC is ±40 V, and the maximum ACPEAK + DC = ±56 V.
Easy Programmability
The QA403 supports a REST interface, making it easy to automate measurements in just about any language you might anticipate. From Python to C++ to Visual Basic—if you know how to load a web page in your favorite language, you can control the QA403 remotely. Measurements are fast and responsive, usually with dozens of commands being processed per second.
Isolated and USB Powered
The QA403 is isolated from the PC, meaning you are measuring your DUT and not chasing some phantom ground loop. The QA403 is USB powered, like nearly all our instruments. If you are setting up remotely, throw a powered hub in your bag and your entire test setup can be running with a minimum of cables.
Goodbye Soundcard, Hello QA403
Tired of trying to make a soundcard work? The calibration nightmare? The lack of gain stages? The limited drive? Are you tired of dealing with the fixed input ranges? The worry that you might destroy it with too much DC or AC? Tired of the ground loops? That’s why QuantAsylum built the QA403.
Specifications
Dimensions
177 x 44 x 97 mm (W x H x D)
Weight
435 g
Case Material
Powder-coating Aluminum (2 mm thick front panel, 1.6 mm thick top/bottom)
Downloads
Datasheet
Manual
GitHub
Program, build, and master over 50 projects with MicroPython and the RP2040 microprocessor The Raspberry Pi Pico is a high-performance microcontroller module designed especially for physical computing. Microcontrollers differ from single-board computers, like the Raspberry Pi 4, in not having an operating system. The Raspberry Pi Pico can be programmed to run a single task very efficiently within real-time control and monitoring applications requiring speed. The ‘Pico’ as we call it, is based on the fast, efficient, and low-cost dual-core ARM Cortex-M0+ RP2040 microcontroller chip running at up to 133 MHz and sporting 264 KB of SRAM, and 2 MB of Flash memory. Besides its large memory, the Pico has even more attractive features including a vast number of GPIO pins, and popular interface modules like ADC, SPI, I²C, UART, and PWM. To cap it all, the chip offers fast and accurate timing modules, a hardware debug interface, and an internal temperature sensor. The Raspberry Pi Pico is easily programmed using popular high-level languages such as MicroPython and or C/C++. This book is an introduction to using the Raspberry Pi Pico microcontroller in conjunction with the MicroPython programming language. The Thonny development environment (IDE) is used in all the projects described. There are over 50 working and tested projects in the book, covering the following topics: Installing the MicroPython on Raspberry Pi Pico using a Raspberry Pi or a PC Timer interrupts and external interrupts Analogue-to-digital converter (ADC) projects Using the internal temperature sensor and external temperature sensor chips Datalogging projects PWM, UART, I²C, and SPI projects Using Wi-Fi and apps to communicate with smartphones Using Bluetooth and apps to communicate with smartphones Digital-to-analogue converter (DAC) projects All projects given in the book have been fully tested and are working. Only basic programming and electronics experience is required to follow the projects. Brief descriptions, block diagrams, detailed circuit diagrams, and full MicroPython program listings are given for all projects described. Readers can find the program listings on the Elektor web page created to support the book.
Specifications
A4 (210 x 297 mm) squared-grid spiral-bound notebook with watermark breadboards
158 pages, card covers.
The book also includes
Microcontroller programming cheat sheet
Common circuits and calculations
Pinouts
Resistor color codes
ASCII table
Learn how to use the ESP32 Microcontroller and MicroPython programming in your future projects!
The project book, written by well-known Elektor author Dogan Ibrahim, holds many software- and hardware-based projects especially developed for the MakePython ESP32 Development Kit. The kit comes with several LEDs, sensors, and actuators. The kit will help you acquire the basic knowledge to create IoT projects.
The book’s fully evaluated projects feature all the supplied components. Each project includes a block diagram, a circuit diagram, a full program listing, and a complete program description.
Included in the kit
1x MakePython ESP32 development board with color LCD
1x Ultrasonic ranging module
1x Temperature and humidity sensor
1x Buzzer module
1x DS18B20 module
1x Infrared module
1x Potentiometer
1x WS2812 module
1x Sound sensor
1x Vibration sensor
1x Photosensitive resistance module
1x Pulse sensor
1x Servo motor
1x USB cable
2x Button
2x Breadboard
45x Jumper wire
10x Resistor 330R
10x LED (Red)
10x LED (Green)
1x Project book (206 pages)
46 Projects in the Book
LED Projects
Blinking LED
Flashing SOS
Blinking LED – using a timer
Alternately flashing LEDs
Button control
Changing the LED flashing rate using pushbutton interrupts
Chasing-LEDs
Binary-counting LEDs
Christmas lights (random-flashing 8 LEDs)
Electronic dice
Lucky day of the week
Pulsewidth Modulation (PWM) Projects
Generate a 1000-Hz PWM waveform with 50% duty cycle
LED brightness control
Measuring the frequency and duty cycle of a PWM waveform
Melody maker
Simple electronic organ
Servo motor control
Servo motor DS18B20 thermometer
Analog To Digital Converter (ADC) Projects
Voltmeter
Plotting the analog input voltage
ESP32 internal temperature sensor
Ohmmeter
Photosensitive resistance module
Digital To Analog Converter (DAC) Projects
Generating fixed voltages
Generating a sawtooth-wave signal
Generating a triangular-wave signal
Arbitrary periodic waveform
Generating a sinewave signal
Generating accurate sinewave signal using timer interrupts
Using The OLED Display
Seconds counter
Event counter
DS18B20 OLED based digital thermometer
ON-OFF temperature controller
Measuring the temperature and humidity
Ultrasonic distance measurement
Height of a person (stadiometer)
Heart rate (pulse) measurement
Other Sensors Supplied with the Kit
Theft alarm
Sound-activated light
Infrared obstacle avoidance with buzzer
WS2812 RGB LED ring
Timestamping temperature and humidity readings
Network Programming
Wi-Fi scanner
Remote control from the Internet browser (using a smartphone or PC) – Web Server
Storing temperature and humidity data in the Cloud
Low-Power Operation
Using a timer to wake up the processor
The book "Node-RED and Raspberry Pi Pico W" describes the Node-RED programming environment in great detail with exciting applications on 527 pages. Only at Elektor, the book gets solid hardware support in the form of the popular SunFounder Kepler Kit with over 450 components including a Raspberry Pico W board. With this bundle, most of the experiments and programming exercises contained in the book can be carried out successfully.
This bundle contains:
Book: Node-Red and the Raspberry Pi Pico W (normal price: €50)
SunFounder Kepler Kit voor Raspberry Pi Pico W (normal price: €70)
Book: Node-RED and Raspberry Pi Pico W
From basics to flows for sensors, automation, motors, MQTT, and cloud services
This book is a learning guide and a reference. Use it to learn Node-RED, Raspberry Pi Pico W, and MicroPython, and add these state-of-the-art tools to your technology toolkit. It will introduce you to virtual machines, Docker, and MySQL in support of IoT projects based on Node-RED and the Raspberry Pi Pico W.
This book combines several elements into a platform that powers the development of modern Internet of Things applications. These elements are a flow-based server, a WiFi-enabled microcontroller, a high-level programming language, and a deployment technology. Combining these elements gives you the tools you need to create automation systems at any scale. From home automation to industrial automation, this book will help you get started.
Node-RED is an open-source flow-based development tool that makes it easy to wire together devices, APIs, and online services. Drag and drop nodes to create a flowchart that turns on your lights at sunset or sends you an email when a sensor detects movement. Raspberry Pi Pico W is a version of the Raspberry Pi Pico with added 802.11n Wi-Fi capability. It is an ideal device for physical computing tasks and an excellent match to the Node-RED.
Quick book facts
Project-based learning approach.
Assumes no prior knowledge of flow-based programming tools.
Learn to use essential infrastructure tools in your projects, such as virtual machines, Docker, MySQL and useful web APIs such as Google Sheets and OpenWeatherMap.
Dozens of mini-projects supported by photographs, wiring schematics, and source code. Get these from the book GitHub repository.
Step-by-step instructions on everything.
All experiments are based on the Raspberry Pi Pico W. A Wi-Fi network is required for all projects.
Downloads
GitHub
SunFounder Kepler Kit voor Raspberry Pi Pico W
Your gateway to IoT and microcontroller programming
With 450+ components and 117 online projects, this comprehensive kit ignites your creativity. The tutorials by Paul McWhorter make learning enjoyable for beginners and advanced users. This kit supports MicroPython, C/C++, and Piper Make, offering diverse programming options.
Explore sensors, actuators, LEDs, and LCDs for endless project possibilities. From home automation to robotics, this kit empowers your tech journey.
Features
IoT Starter Kit for Beginners: This kit offers a rich IoT learning experience for beginners. With 450+ components, 117 projects, and expert-led video lessons, this kit makes learning microcontroller programming and IoT engaging and accessible.
Expert-Guided Video Lessons: The kit includes 27 video tutorials by the renowned educator, Paul McWhorter. His engaging style simplifies complex concepts, ensuring an effective learning experience in microcontroller programming.
Wide Range of Hardware: The kit includes a diverse array of components like sensors, actuators, LEDs, LCDs, and more, enabling you to experiment and create a variety of projects with the Raspberry Pi Pico W.
Supports Multiple Languages: The kit offers versatility with support for three programming languages - MicroPython, C/C++, and Piper Make, providing a diverse programming learning experience.
Dedicated Support: Benefit from our ongoing assistance, including a community forum and timely technical help for a seamless learning experience.
Included
Raspberry Pi Pico W
Breadboard
Jumper Wires
Resistor
Transistor
Capacitor
Diode
Li-po Charger Module
74HC595
TA6586 – Motor Driver Chip
LED
RGB LED
LED Bar Graph
7-segment Display
4-Digit 7-Segment Display
LED Dot Matrix
I²C LCD1602
WS2812 RGB 8 LEDs Strip
Buzzer
DC Motor
Servo
DC Water Pump
Relay
Button
Micro Switch
Slide Switch
Potentiometer
Infrared Receiver
Joystick Module
4x4 Keypad
MPR121 Module
MFRC522 Module
Photoresistor
Thermistor
Tilt Switch
Reed Switch
PIR Motion Sensor Module
Water Level Sensor Module
Ultrasonic Module
DHT11 Humiture Sensor
MPU6050 Module
Documentation
Online Tutorial