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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 portable mini refrigerator, so that I can carry, wherever I…
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 the code already. 2017-03-26 update:Share the MG90 servo version – http://www.thingiverse.com/thing:2204279…
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 one of these e-paper display modules and an the Arduino…
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 the user to connect the ESP8266 to a computer via…
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 that comes in your mind is to use an RTC…
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 online servers like Webserver, Media server, Print Server, Plex server etc. So here we will…
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 a Web server and how it works? Web server 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 best way to prove the weatherman wrong! These sensors are…
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 to existing WiFi network & creates a Web Server. When…
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 adorable, bite-sized WiFi enabled microcontroller – ESP8266, at an unbelievable price!…
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 and receiving emails. But this is not enough, sometimes we…
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 mobile analogue (FM) transceivers for uplink and downlink, paired with…
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 hotspot (Jumbo Spot) it is possible to talk to Hams around the…
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 the data and stores it into a database. It also…
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 receives the data, validates it and then stores it into…
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 enter this as this url in the browser. In this…
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 presented in. The data that is collected is pretty raw….
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 pvc tube which is widely used by plumbers for the…
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 box gives us flexibility to add functionality and other features…
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 resistance depending on the direction. We connect this to an…
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 that the DS18B20 and BME280 sensors are working okay we…
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 supply for this sensor. It will be connected to pins…
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. We need to connect a 4k7 resistor between the power…
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 POE (Power Over Ethernet). As we work through the…
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 charge controller. In April-2014 I posted my PWM solar charge…
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 all the necessary ingredients to make a small, low power…
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, and they’ve certainly come up many uses for the Raspberry…
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 Solar panels going into the batteries. The main function is…
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 all of my projects on : https://www.opengreenenergy.com/ This instructable will cover…
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 Raspberry Pi. It is especially useful if you have 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 pen pile. One of the two Li-ion batteries was enough battery power…
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 computer and installation requires some basic Linux skills. Gqrx SDR…
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 board for interim node setups and testing. Per the FAQ,…
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 Core Story Introduction Raspberry Pi 3 Model B + is…
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 panels are not new to us and today it’s being employed…
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 works very well even with a lot of noise It’s…
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 use away from a computer like the Secret Knock Detector, or…
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 suit a desired application in the most effective way. The range of…
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 the voltage and current coming from the solar panel ….
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 keeps track of current time accurately. It does two functions,…
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 hassle, especially if you have to charge your phone at…
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 all the necessary ingredients to make a small, low power…
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 the smartphone in your pocket, to high performance electric cars…
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 pretty much any mid-range application you can think of that…
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 Scouts group. So I was intrigued and then hooked when…
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 and businesses. Solar cells contain materials with semiconducting properties in…
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 Need Hardware Bluetooth Module HC 05/06 Arduino LED 220Ω Resistor…
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 provides more energy than our current population would consume in…
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 output before installing them. By learning how to test solar…
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 renewable energy systems use the same electro-chemical reactions as the…
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 of my earlier project, I decided to make this new…
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. After some brainstorming and by using my past DIY experience,…