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 […]

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 […]

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 […]

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 […]

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 […]

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 […]

In my locality, frequent load shading is a very common problem during the summer evening. I am really tired of this problem. I always wanted to have a mini UPS system which can power up my WiFi-Router/Modem for internet purposes and also charge my Smartphone. […]