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Dusan [email protected] Because of the ADS-B receivers input inpedance is usually 50 ohm I have build and tested two pure 50 ohm coaxial collinear antenna configurations and compared it with two similar mismatched coaxial collinear antenna configurations.  ADS-B receiver used in these tests is Kinetic SBS […]

Dusan [email protected] The original antenna obtained with the ADS-B receiver AirNav( RadarBoxPRO is so great product that it is hard to build a better home made omnidirectional antenna with a higher gain than the original one. During my almost one year period of experiments with […]

 by Roger Clark | In my previous post, I reviewed some “5V 1W” solar panels, with a view to using them to power some IoT devices, and in this post I’ll show my experiments and conclusions about using the panel to charge the battery. LiPo cells have […]

What’s a Lipo battery? Lipo Battery, its full name is lithium polymer battery, people also called Li-po battery, or more correctly lithium-ion polymer battery (abbreviated as LiPo, LIP, Li-poly and others). Lipo is a rechargeable battery of lithium-ion technology using a polymer electrolyte instead of a […]

This tutorial shows how to build a simple weather station using ESP8266 NodeMCU board (ESP12-E module) and BME280 barometric pressure, temperature & humidity sensor.The NodeMCU reads temperature & humidity & pressure values from the BME280 sensor and prints them (respectively in °C & RH% & […]

alpha  Todo electrónico necesita en su equipo de laboratorio una fuente de alimentación (FA). Es típico al principio que dicha fuente sea un proyecto DIY de una fuente de tipo lineal. Hoy os contaré de una FA conmutada económica y porqué creo que una fuente de laboratorio […]

This tutorial shows how to build a simple weather station using ESP8266 NodeMCU board (ESP12-E module) and BME280 barometric pressure, temperature & humidity sensor.The NodeMCU microcontroller (ESP8266EX) reads temperature & humidity & pressure values from the BME280 sensor and prints them (respectively in °C & […]

This post shows how to build a weather station using ESP8266 NodeMCU development board (ESP12-E module) and BME280 barometric pressure, temperature & humidity sensor.The NodeMCU reads temperature & humidity & pressure values from the BME280 sensor and prints them (respectively in °C & RH% & […]

This tutorial shows how to make a digital real time clock using ESP8266 NodeMCU board (ESP-12E) and DS3231 RTC module where time & date can be set with two push buttons connected to the NodeMCU and they are printed (with RTC chip temperature) on ST7789 […]

Hella Kharlamova Description: It is a Lithium battery capacity tester.It is used to test the voltage, discharge capacity and discharge energy of a 18650 lithium battery. Features: – Dual working power supply- 18650 battery special tester- Support display discharge capacity- Support display discharge energy- Support parameter memory function Specifications: Work […]

Dire Wolf is a software “soundcard” AX.25 packet modem/TNC and APRS encoder/decoder. It can be used stand-alone to observe APRS traffic, as a tracker, digipeater, APRStt gateway, or Internet Gateway (IGate). Documentation for Dire Wolf Click on the document name to view in your web […]

This tutorial shows how to interface ESP8266 NodeMCU (ESP-12E) board with ILI9341 TFT display.The ILI9341 TFT module contains a display controller with the same name: ILI9341. It’s a color display that uses SPI interface protocol and requires 4 or 5 control pins, it’s low cost […]

Post author: techstudycell Description: In this IoT based project, we will learn how to make a Home Automation project using NodeMCU and Blynk App. The circuit is very simple, we just need a Nodemcu board and a relay module to control home appliances securely from […]

This tutorial shows how to interface ESP8266 NodeMCU (ESP-12E) board with ST7789 TFT display.The ST7789 TFT module contains a display controller with the same name: ST7789. It’s a color display that uses SPI interface protocol and requires 3, 4 or 5 control pins, it’s low […]

This post shows how interface ESP8266 NodeMCU development board (ESP12-E module) with Nokia 5110 (3310) graphical LCD screen.The name Nokia 5110 (3310) comes from Nokia 5110 (or Nokia 3310) mobile phone. The Nokia 5110 LCD has a controller named PCD8544, it is similar to the […]

This topic shows how to interface the SSD1306 OLED display with ESP8266 NodeMCU development board (ESP-12E). The display used in this project has a resolution of 128×64 Pixel and works in I2C mode, that means the NodeMCU communicates with the display using I2C communication protocol. The […]

Faster processor, more RAM and 4K video output By Avram Piltch  Editor’s Choice(Image: © Shutterstock) OUR VERDICT Starting at just $35 for the 2GB model, the Raspberry Pi 4 is the world’s best single-board computer, a must-have for tech enthusiasts of all ages. FOR Much faster […]

Autor:Bernardo Herrera Pérez El balun (contracción de las palabras inglesas BALanced to UNbalanced transformer), conocido popularmente como “cachimba” o “adaptador de impedancias”, es un dispositivo muy importante a la hora de acoplar una antena a un televisor (TV), ya sea mediante un cable coaxial o […]

 by Gus   In this tutorial, I will be going through the steps on how to set up a Raspberry Pi Print Server. The process of getting the software installed is pretty simple, but configuring it and getting a Windows network to find the print server is […]

By Tarantula3 The very first program you write when you start learning a new programming language is: “Hello World!”. The program itself does nothing more than printing a “Hello World” text on the screen. So, how do we get our Arduino to display the “Hello World!”? […]

This article shows how to use the SSD1306 0.96 inch I2C OLED display with the Arduino. We’ll show you some features of the OLED display, how to connect it to the Arduino board, and how to write text, draw shapes and display bitmap images. Lastly, […]

ARDUINO By Saddam Wireless notice board is very selective term for this project, as it has a very wide scope rather than just being a simple notice board. First we should understand the purpose of this project, in this system we can display a message or […]

By Saddam  In our previous article, we have learned about “How to interface GPS module with Computer and How to make a GPS updated Clock”. In this project we are going one step ahead with GPS and going to track a vehicle using GPS and GSM. This Vehicle Tracking System can also […]

ARDUINO By Saddam  Mobile phone is a revolutionary invention of the century. It was primarily designed for making and receiving calls & text messages, but it has become the whole world after the Smart phone comes into the picture. In this project we are building […]

ARDUINO By Saddam GPS is a very useful device which is used in many electronics projects and applications like vehicle tracking system, GPS Clock, Accident Detection Alert System, traffic navigation and surveillance system etc. But question is how to use the GPS and read the data from GPS? We can easily get […]

ARDUINO By Saddam There are many GPS satellites around the Earth which are used to provide the exact location of any place. Along with the location coordinates (Latitude and Longitude), it also provide other data like time, date, altitude, direction tracking angle etc. We have […]

With the CBCinstalling an HDTV transmitter in the area, I decided to look at OTA (off-the-air) HDTV as an alternative to Starchoice HDTV. With the transmitter site no more than 25 kms from my house, rabbit ears or a folded dipole probably would work ok, […]

By TijlDeLandtsheer Introduction: AirPi – Air Quality Sensor Have you ever wondered why you’re getting a headache? And if this is due to a bad air quality? With this device you’re able to check if this is the case. This device measures the CO2-value, TVOC-value, temperature […]

By PJ Evans. When Samuel Morse created his communication system in the mid-1800s, it revolutionised wireless communication. The original idea was that simple electronic pulses could be sent further and more reliably than voice, and so the Morse alphabet was used to describe each letter […]

There are a wide variety of temperature sensors compatible with Arduino, ESP32, ESP8266 and other development boards. So, it can be difficult to to pick up the most suitable sensor for your project. In this article, we’ll compare 6 widely used temperature sensors: DHT11, DHT22, […]

Download PDFYouTube Introduction Surveillance cameras are everywhere these days, or so it seems. You’ll find them everywhere –  protecting businesses and property, guarding residences or keeping an eye on children and their babysitters. The availability of low-cost camera modules makes a surveillance camera an excellent […]

BySaddam  Vehicle Tracking System becomes very important now days, especially in case of stolen vehicles. If you have GPS system installed in your vehicle, you can track you Vehicle Location, and its helps police to track the Stolen Vehicles. Previously we have built similar project in which Location […]

 by Emmet  Jun 21, 2019  Updated Dec 10, 2019   In this Raspberry Pi NFS tutorial, we will be showing you how you can share files from your Raspberry Pi using the Network File System (NFS) protocol. The Network File System (NFS) protocol was initially developed by Sun Microsystems back in 1983. […]

 by Emmet  Nov 23, 2019  Updated Dec 01, 2019 In this tutorial, we will be walking you through the steps of setting up a DNS server on your Raspberry Pi. A DNS server is what handles translating a domain name such as pimylifeup.com to its end destination. It’s what helps transform […]

By Open Green Energy Featured Published Nov 28th, 2016 Introduction: DIY Portable Mini Refrigerator By Open Green Energy I always love to drink chilled Coke. But when I go for a outing, no more any chance to get the chilled Coke.So I seriously wanted to have a […]

By sabas1080  Introduction: E-paper Display With Arduino/ESP8266 About: Fundador de The Inventor’s House Hackerspace, Movimiento Maker y Hardware Libre, DIY, Workaholic Hola inventores hoy voy a mostrarles como utilizar una pantalla de tinta electrónica con un Arduino o un ESP8266 via serial de una manera muy […]

A vector network analyzer (VNA) is an instrument that can be used to measure antenna or coax parameters such as SWR, impedance and loss. It can also be used to characterize and tune filters. It is a very useful tool to have if you are […]

By RegisHsu About: My Chinese name is 許英豪. My background is Electronic and software engineering. I have over 30 years design experience on the SmartPhone, Tablet and Digital camera. I love DIY!  2019-10-10 update:The new compiler will cause the floating number calculation problem. I have modified […]

Make your own printed circuit board at home to reduce problems that arise from loose connections on a breadboard. If you are into electronics, PCBs are some of the most common things you will see. These boards make our lives easier by eliminating all those […]

By voltlog in CircuitsElectronics Introduction: Getting Started With E-Paper Display Modules About: Electronics enthusiast, vlogger on youtube. More About voltlog » In this video I’m gonna show you how to load a custom image on the e-paper display. Let’s see how easy it is to get started working with […]

Have you ever wanted to have sensors scattered all around your house and garden reporting their temperature regularly to a central server? Then, this IoT project might be the solid launching point for you! This project uses ESP8266 NodeMCU as the control device that easily […]

A fantastic feature of any WiFi-enabled microcontroller like ESP8266 NodeMCU is the ability to update its firmware wirelessly. This is known as Over-The-Air (OTA) programming. What is OTA programming in ESP8266? The OTA programming allows updating/uploading a new program to ESP8266 using Wi-Fi instead of requiring […]

Want to add little graphic pizzazz to your ESP8266 IoT projects? Or maybe you want to display IP address of your ESP8266 without resorting to serial output. These super-cool OLED (Organic Light-Emitting Diode) displays might be the perfect fit! They’re super-light, almost paper-thin, theoretically flexible, […]

Every once in a while you’ll come across an idea where keeping time a prime concern. For example, imagine a relay that has to be activated at a certain time or a data logger that has to store values at precise intervals. The first thing […]

ByAbhishek Bakolia Jun 05, 20190 RTC or Real Time Clock is the most commonly used module in Electronics and embedded devices to keep track of time. But the problem with RTC is that the microchips in computers are not that much accurate and they can only provide […]

ByRishabh Jain Aug 13, 2019 Raspberry Pi is the pocket sized computer having almost all the feature of a normal computer including USB port, LAN port, audio/video output, HDMI port etc. It also has inbuilt Bluetooth and Wi-Fi connectivity which makes it perfect candidate to build various […]

Over the past few years, the ESP8266 has been a growing star among IoT or WiFi-related projects. It’s an extremely cost-effective WiFi module that – with a little extra effort – can be programmed to build a standalone web server. How cool is that! What is […]

Its summer, you’re sweating heavily and all you really want to know is why the weatherman predicted this morning that today’s relative temperature would max out to 20°C while it feels more like 25°C. Enter the DHT11, DHT22/AM2302 Digital Temperature & Humidity Sensor from AOSONG – the […]

Don’t let the smartphone weather apps or commercial weather stations(that feeds you with data from stations based miles away) ruin your outdoor plans. With this IoT project you can be your own weatherman! This project uses ESP8266 NodeMCU as the control device that easily connects […]

The Internet of Things (IoT) has been a trending field in the world of technology. It has changed the way we work. Physical objects and the digital world are connected now more than ever. Keeping this in mind, Espressif Systems (A Shanghai-based Semiconductor Company) has released an […]

ssmtp is a nice and simple solution for sending emails from the command line etc. Installing Now edit the SSMTP configuration file It needs to include this: Save and exit Sending an email Sending A File Install mpack To send a file

Written by Rahul, Updated on September 11, 2019 Linux Commands, Mail Servicesmail, mutt, sendmail, ssmtp, telnet We all know the importance of emails these days for information transfer. There are many free emails service providers which we used for use like Gmail, Yahoo, RediffMail etc, which provides a web interface for sending […]

Installing MMDVM on an STM32F4 NUCLEO board and assembling an interface shield. In this series of posts we take a look at building a Digital Mobile Radio (DMR) repeater for amateur radio use on the 70cm band (UHF). This will be constructed using two surplus […]

In Ailunce and DMR by K0PIRFebruary 7, 2019 Talk and listen to Hams around the world at home using a small handheld radio! I just got started in DMR and have found it pretty easy and inexpensive. With an Internet connection and the Ailunce HD1 combined with the MMDVM […]

Podcast: Descargar (149.4MB) Cuando creamos proyectos IoT con Arduino, tenemos varias maneras de monitorizar los datos que captamos a través de los sensores. La más básica y que requiere tener el dispositivo conectado a un ordenador es a través del monitor serie. Si tenemos algún display como un […]

By Open Green Energy [ Play Video ] Welcome to my solar charge controller tutorials series.I have posted two version of my PWM charge controller.If you are new to this please refer my earlier tutorial for understanding the basics of charge controller. 1. Version-1 2. Version-2 You can find […]

Arduino Weather Station Project Part 10: Send Data to the Cloud In the final part of this project we configure the controller as a web client. We transmit the station data to a cloud server every 60 seconds. The cloud server it connects to processes […]

Weather Station Web Server Client (Part 10) In the last part of this project we configure the weather station controller as a web client. We send the data from the sensors connected to the controller to a web server via the Internet. The web server […]

Weather Station Web Server (Part 9) The software sketch shown below turns the weather station into a basic web server. This allows you to connect to the station using a web browser of your choice. Using the static IP address assigned to EtherTen board we […]

Getting Data from the Weather Station Now that we have assembled the weather station the next part of the project is to look at different ways to get data from the controller. Listed below is the data that is available and what units they are […]

Assemble the Weather Shelter (Part 7) The weather shelter was put together using a collection of plastic plumbing parts that are available from your local hardware store or depot. Some of the parts can also be recycled from building sites. We used a 100mm plastic […]

Hooking Up the Arduino Controller Box (Part 6) We decided to mount the Arduino board (Freetronics EtherTen) and shield inside a IP66 rated plastic box. We could have mounted the Arduino inside the weather shield but it would have been a tight fit. This controller […]

Hooking Up the Davis Anemometer (Part 5) Once we have confirmed all the other sensors are working okay we now hookup the last sensor which is the Davis anemometer. This device has two sensors. The wind direction is measured using a potentiometer that changes it’s […]

Hooking Up the Hydreon RG-11 Rain Sensor (Part 4) Observation: The Hydreon sensor is not as accurate as a tipping bucket rain gauge. It tends to read high in comparison. However this sensor will detect rain before a tipping bucket gauge. Once we have confirmed […]

Hooking Up the Bosch BME280 Temperature, Humidity and Pressure Sensor (Part 3) Once we have connected up the DS18B20 and tested it with the sketch we can hookup the BME280 sensor. We are connecting up the sensor using I2C communications. We are using a 5V […]

Hooking Up the DS18B20 Temperature Sensor (Part 2) The first sensor we connect up is the Dallas DS18B20 temperature sensor. We need to use a waterproof version as the sensor will be mounted outside the weather station shelter but protected by the wind temperature cover. […]

Overview (part 1) In this project we are putting together a Weather Station using a variety of sensors. The platform being used is an Arduino board (Freetronics EtherTen) with built in Ethernet. This will provide communications to the sensor along with a power source provided […]

By Open Green Energy [ Play Video ] One year ago, I began building my own solar system to provide power for my village house. Initially, I made a LM317 based charge controller and an Energy meter for monitoring the system. Finally, I made a PWM […]

The Raspberry Pi is a small single board computer which runs a Debian Linux package called Raspbien compiled for its ARM processor. The board includes two USB ports, HDMI video and sound, Ethernet, GPIO, and an SD card slot for the operating system. It has […]

Luis del Valle Hernández Si digo Raspberry Pi ¿sabes de lo que estoy hablando? Raspberry Pi es un miniordenador que se utiliza desde centro multimedia hasta de cerebro en robots. Pero ¿qué ha hecho famoso a este dispositivo? Uno de los factores clave de las […]

¿Como hacer el Cubo de Rubik 4×4? Seguro alguna vez te has preguntado cómo se resuelve un cubo 4×4. En este tutorial te lo vamos a explicar paso a paso pero, para ello, es necesario que hayas aprendido primero a hacer el cubo de rubik 3×3. Si […]

The Raspberry Pi 4 is a massive leap forward for the low-cost computer, marking a number of firsts in the evolution of the best-selling board. Designed to let people experiment with building software and hardware, the Raspberry Pi has always been defined by its users, […]

Updated: Aug 5 If you are planning to install an off-grid solar system with battery bank, you’ll need a Solar Charge Controller. It is a device which is placed between the Solar Panel and the Battery Bank to control the amount of electric energy produced by […]

By Open Green Energy [ Play Video ] Welcome to my solar charge controller tutorials series.I have posted two version of my PWM charge controller.If you are new to this please refer my earlier tutorial for understanding the basics of charge controller. 1. Version-1 2. Version-2 You can find […]

 by Emmet  Feb 11, 2019  Updated May 24, 2019  In this Raspberry Pi Fail2ban tutorial, we will be showing you how to set up and configure the Fail2ban software on your Raspberry Pi. Fail2ban is a crucial piece of software when it comes to improving the security of your […]

During the past year, I replaced a lot of batteries at home with a lot of batteries and replaced them with Li-ion batteries. Lantern radios, Led lantern, Hand broom etc … One of the radio lanterns was a 6v battery and the other one was a 1.5v […]

Gqrx SDR is available as binary package for the Raspberry Pi 3 running Raspbian Stretch and other ARM v6 running a Debian Stretch based OS. Please understand that Gqrx on ARM is still very experimental! It does not work as well as on a desktop […]

It has occurred to many that the board could be easily made for very little expense. However there is no official schematic for the interface board.  Maybe you are interested in messing with a Linux based repeater controller. Or are I need of a spare IRLP […]

The hardware and software that we need to run Windows 10 IoT Core on Raspberry Pi 3 Model B+.EasyFull instructions provided1 hour38,794 Things used in this project Hardware components Raspberry Pi 3 Model B+ × 1 Software apps and online services Microsoft Windows 10 IoT […]

Updated:June 21, 2019by Swagatam The post comprehensively explains nine best yet simple solar battery charger circuits using the IC LM338, transistors, mosfets, buck converter, etc which can be built and installed even by a layman for charging all types of batteries and operating other related equipment Overview Solar […]

In 2017, FT8 started to become the most popular of the various data modes. At the time of writing (Feb 2018), it appears to be the most popular for a number of reasons: It’s fairly simple to set up It’s significantly faster than the similar JT-65 It […]

¿Te gustaría saber como hacer el cubo de rubik 2×2? Normalmente lo vemos tan pequeño y con tan pocas piezas que pensamos que es muy sencillo (y realmente lo es); pero necesitas conocer algunos pasos para poder finalizarlo con éxito. Lo primero que tenemos que tener […]

So you’ve just finished building your Arduino project, and it’s happily running off the USB lead hanging out of your computer. And if it something like the Arduino Clock that looks at home on a desk, then everything is fine. But if it’s something you want to […]

Updated:June 8, 2019by Swagatam In this post we present a list of popular Arduino boards that are used by engineering students and professionals for their specific application needs. The types of Arduino boards discussed here are designed with a range of unique features and specifications to […]

If you are planning to install an off-grid solar system with battery bank, you’ll need a Solar Charge Controller. Charge controllers act as a gateway to your battery, and prevent the battery from being over/under charged by the solar panel. A solar charge controller regulates […]

Updated:January 13, 2019by Swagatam In this post we are going to construct a digital clock using RTC or Real Time Clock module. We will understand what “RTC” module is, how to interface with Arduino and what it does. By: Arduino Guru RTC module is a circuit, which […]

By lonesoulsurfer About: I’ve always liked pulling things apart – it’s the putting back together again that I have some issues with. Camping these days usually means bringing along things that need power. Usually I’d just use the cars 12v outlet but I find this a […]

The Raspberry Pi is a small single board computer which runs a Debian Linux package called Raspbien compiled for its ARM processor. The board includes two USB ports, HDMI video and sound, Ethernet, GPIO, and an SD card slot for the operating system. It has […]

Por XE1E  Enrique Rodríguez Ll. * Radiador de ½  onda Sección de acoplamiento de ¼ de onda Impedancia de 50 ohms Relación de ondas estacionarias  1.2:1 en VHF y 1.5:1 en UHF Polarización vertical Omnidireccional Ganancia unitaria Material necesario: 1.- 1.5 mts. de cable plano […]

Lithium, it’s the lightest metal on the periodic table, and the one most willing to donate its electrons (the most powerful reducing agent) — you really can’t find an element that’s more suitable for creating light weight, high energy density batteries. From portable electronics like […]

Lead-Acid Batteries Invented by French physicist Gaston Plante in 1859, the lead-acid battery is best known as the de facto rechargeable energy storage solution of choice for most cars, trucks, and other vehicles. It is also widely used in boats, submarines, uninterruptible power supplies (UPS), and […]

By JamesP383 3 More Images “So, you want to build an 8x8x8 RGB LED Cube” I’ve been playing around with electronics and Arduino’s for a while now, including building a high amp switch controller for my car and a six lane Pinewood Derby Judge for our […]

Cuando te adentras un poco en el mundo de los cubos de rubik, comienzas a ver la gran variedad de rompecabezas de los que se compone y… ¡vaya, existen muchos más a parte del clásico rubik 3×3! En este tutorial vamos a aprender a resolver el […]

Hundreds of solar cells (also called photovoltaic cells) make up a solar photovoltaic (PV) array. Solar cells are the components of solar arrays that convert radiant light from the sun into electricity that is then used to power electrical devices and heat and cool homes […]

By Mayoogh_Girish  By Mayoogh_GirishMayoogh GirishFollowMore by the author: Ever thought of controlling any electronic devices with your smart phone ?Controlling your robot or any other devices with your smartphone will be really cool. Here is is a simple and basic tutorial for interfacing Bluetooth with arduinoAdd TipAsk QuestionCommentDownload Step 1: Things You […]

The Earth receives an incredible supply of solar energy. The sun, an average star, is a fusion reactor that has been burning over 4 billion years. It provides enough energy in one minute to supply the world’s energy needs for one year. In one day, it […]

How to test solar panels to make sure they’re working properly. Procedure For Testing Solar Panels Properly testing your solar panels is a very important but often overlooked procedure. You wouldn’t believe how many people completely skip testing solar panels and forget to confirm their solar power […]

For when the sun doesn’t shine… A battery stores electrical energy in a reversible chemical reaction. The renewable energy (RE) source (PV, wind, or hydro) produces the energy, and the battery stores it for times of low or no RE production. Most batteries employed in […]

By Open Green Energy DownloadFavorite This Instructable is a continuation of my earlier weather station project. It was quite popular on the web, people around the globe made their own by following it and given valuable feedback for improvement. By taking consideration of the comments and Q&A section […]

El skewb es un cubo de rubik de fácil resolución y muy entretenido. Este tipo de rompecabezas gira en torno a los vértices y presenta giros de 120º. Al realizar un giro se mueve la mitad del cubo por lo que en un principio puede […]