A solar charge controller regulates the voltage and current coming from your solar panels which is placed between a solar panel and a battery .It is used to maintain the proper charging voltage on the batteries. As the input voltage from the solar panel rises, the charge controller regulates the charge to the batteries preventing any over charging.
Arduino Solar Charge Controller (PWM) - [Link]
Syst3mX @ instructables writes:
One day I was sitting behind my desk at work and I got that weird need to build something, after looking around for a bit I got my eye on an LED matrix and that sparked an idea in my head : “I WANNA MAKE A TAMAGOTCHI”.
So for those of you that don’t know what the heck is a Tamagotchi here is a little snip-it from wikipedia :
“The Tamagotchi (たまごっち Tamagocchi?) is a handheld digital pet, created in Japan by Akihiro Yokoi of WiZ and Aki Maita of Bandai. It was first sold by Bandai in 1996 in Japan.”
So my take on this classic toy is to make it in to a desktop gadget with an LED matrix for a display, and an Arduino for brains to make it more accessible to people. With that said join me as we design,build and program the World’s first (As far as I know) desktop Tamagotchi.
Make a Desktop Tamagotchi - [Link]
rahulkar @ instructables.com writes:
This is a complete DIY project which requires a handful of components such as the ATtiny 85, LM35, MAX7219 and a couple of resistors and capacitors running off a regulated 5 V supply.
Temperature Measurement Range : 0 to 150′C / 32 to 300’F
Controller: ATtiny 85
Display type – 4 digit multiplexed 7 segment display (Common Cathode type)
Programming Language: Arduino
The setup can display both in Celsius and Fahrenheit. By default the temperature is shown in Celsius but can be toggled to display in Fahrenheit using the push button.
7 Segment Digital Thermometer using ATtiny 85 - [Link]
jollifactory @ instructables writes:
Here, we show how a 7 Bi-color 8×8 LED Matrix Scrolling Text Display is built, in which messages and commands can be sent to it via Bluetooth using an Android Smart Phone. Logically, any devices capable of sending text messages via Bluetooth may be adapted to work with the display.
To build this project, basic electronics component soldering skills and some knowledge on using the Arduino or Arduino based micro-controllers are required.
The reason for building a 7 LED Matrices long display is that it is quite adequate for ease of reading scrolling text and also because the largest tinted acrylic sheet easily available in Hobby or Art shops is 18 inches by 12 inches, which is just the right length for making the enclosure for the display as each LED matrix is around 60mm x 60mm in size.
7 Bi-color LED Matrix Scrolling Text Display - [Link]
This project turns the Arduino UNO into a computer running the BASIC programming. languagedan14 @ instructable.com writes:
Hi all, this is my first instructable documenting the creation of my project, the Arduino UNO BASIC shield which turns the Arduino UNO into a computer running the BASIC programming language.
As microcontrollers are essentially low performance computers on a chip (they have a processor, RAM and ROM) they can be used to create small computer systems. The aim of this project was to use AVR microcontrollers to create a computer capable of running the BASIC programming language.
Arduino BASIC Shield - [Link]
02JanDal @ instructables.com writes:
So, what exactly is this about?
Imagine: You are working on a project. You want to program in the Arduino language because of the simplicy. But you don’t want to use a 28 pin monster. Or you need peripherals like CAN or similar what the normal Arduino supported MCUs don’t have. So, what to do? Where are two alternatives:
1. Just don’t use the Arduino language and use things like bits and ports what you can’t understand.
2. Or continue reading this!
So, this instructable is going to show how to use the core files available from avr-developers.com. I’m also going to show you how to program the different MCUs and how to connect them to do so. At the end I’m going to give some ideas on what you can to with your new knowledge earned from this.
Arduino on all sorts of Atmels - [Link]
xlisus @ instructables.com writes:
Choose the hue of light that makes you feel more comfortable.
Simple bluetooth remote control from which you can modify lighting from your mobile device or tablet.
- You have two separate RGB channels where you can get different colors per channel.
- Control adjustable intensity.
- Do it yourself .
- Thanks to the arduino platform in minutes you ‘ll Omniblug armed and ready for use.
Discover all the features provided. Is very easy install this small device.
Android Bluetooth Control Led RGB - [Link]
This article is another step forward in learning more about Arduino. In our previous article, I have written in detail about blinking an LED using Arduino. We have demonstrated 5 simple led based projects using arduino, which will help you to learn its basic concepts.
Simple LED Projects using Arduino - [Link]
Raj @ embedded-lab.com
In this blog post, I am providing you step by step instructions to build a very simple temperature and relative humidity meter for indoor use. All you need to build this project are an Arduino Uno or compatible board, a DHT11 sensor, and a MAX7219 based 8-digit serial 7-segment LED display. The temperature is displayed in degree Celsius and relative humidity in percentage.
Step-by-step guide for making a very simple temperature and humidity meter - [Link]
jojo @ circuitstoday.com writes:
When we learn a new programming language in computer science (say C, PHP or Java), we begin the learning curve with the classic “Hello World” program. We learn some essential keywords used in the programming language, then we learn the structure of the language and finally we begin to play with the language by making it display the two words “hello world” in our computer screen. So that’s how we begin to learn a programming language used to build computer applications. Our world of embedded systems is a little different. We create software to control hardware. In our world, we begin our learning curve by saying “hello world” using an LED. Our way of “hello world” is blinking an LED using the micro controller under study.
Blink LED with Arduino – say Hello World - [Link]