This is an Arduino monitor – tester by ctopconsult.com:
One LED for every single input or output
Can be used with Uno, Leonardo, Mega, Due, Mini, etc.
Also fits with my universal I/O board
Power taken from Arduino 5V and 3.3V outputs, and the Vin
Load on any pin is 10 kohm or more
LED intensity proportionally reflects the pin voltage or duty cycle
Arduino Monitor/Tester - [Link]
The Arduino’s greatest weakness is also it’s greatest triumph. That is, it is only a low power simple processor, which makes internet connectivity for such a simple device difficult. Often the network interface has a few orders of magnitude greater performance than the arduino atmel avr processor itself.
Arduino Yun is the answer to wifi connectivity for arduino. Ushering in a new era known as the internet of things, Yun is actually a complete 400mhz system on chip. There is irony in the fact that the powerful system on chip’s only duty is to serve the lowly AVR. Akin to “You Pass Butter”
Arduino Wifi With Hi Flying HF-LPT100 - [Link]
Colin over at CuPID Controls writes:
We want to put our remote sense and control modules out into the wild and read and aggregate them as it makes sense.
Our basic system layout is as below. We’ve got multiple wireless nodes that broadcast data periodically, and a controller/aggregator that will log this data, acknowledge receipt, and do something useful with it. Eventually, we may have intermediate powered nodes that serve to mesh the grid out, but for now, our nodes just send data to the controller.
We’re currently using these awesome little RF units, called Moteinos. They are an Arduino clone that can use the standard IDE with their bootloader. They’ve got the ever-so-popular ATMega328P chip that is familiar to anybody working with an Arduino Nano or Uno.
Adventures in Moteino: Remote temperature monitor - [Link]
by ohneschuh @ instructables.com:
Capacitive sensors are an elegant way to control an Arduino using the Capacitive Sensing Library. But the sensitivity and error tolerance depend strongly on the hardware (sensor) design. I found a design guideline here and tested different setups which mostly work well if the Arduino was powered by battery. But the sensor signal changes dramatically if I connect the Arduino to a power supply.
Actually I found a design for five (and more) sensors which works well powered with battery and power supply.
Capacitive Sensor Design - [Link]
Make your Arduino walk and chew gum at the same time.
Once you have mastered the basic blinking leds, simple sensors and sweeping servos, it’s time to move on to bigger and better projects. That usually involves combining bits and pieces of simpler sketches and trying to make them work together. The first thing you will discover is that some of those sketches that ran perfectly by themselves, just don’t play well with others.
The Arduino is a very simple processor with no operating system and can only run one program at a time. Unlike your personal computer or a Raspberry Pi, the Arduino has no way to load and run multiple programs.
That doesn’t mean that we can’t manage multiple tasks on an Arduino. We just need to use a different approach. Since there is no operating system to help us out, We have to take matters into our own hands.
Multi-tasking the Arduino - [Link]
Use a $4 microcontroller to launch web pages with the push of a button over serial I/O.. by Elliot Williams @ makezine.com:
A microcontroller is a self-contained, but very limited computer — halfway between a computer and a component.
The top reasons to integrate a microcontroller into your projects are connectivity and interactivity, and one easy way to get your microcontroller talking with the outside world is standard asynchronous serial I/O. Many devices can communicate this way, from wi-fi routers to GPS units to your desktop or laptop computer. Getting comfortable with serial I/O makes debugging your AVR programs much easier because the AVR can finally talk to you, opening up a huge opportunity for awesome.
Beyond the Arduino IDE: AVR USART Serial - [Link]
by Jeff Murchison @ murchlabs.com:
I finally finished the next version of my TinyLoadr AVR programming Shield – and it’s not a shield. It’s a standalone USB programmer, so you no longer have to have an extra Arduino laying around. The best part? It’s the same price as the shield was!
TinyLoadr AVR Programmer - [Link]
LED matrices are a popular mean of displaying text, graphics, and animated information at gas stations, convenient stores, and many other public places. Raj’s new project is about making a Bluetooth-enabled 8×64 LED matrix display, where you can send the text messages through a smartphone over a Bluetooth connection. He used Arduino as the main controller and an HC-06 Bluetooth adapter to receive data from the smartphone. He has shared all of his design files and Arduino firmware on his blog.
DIY LED Matrix Display with Bluetooth support - [Link]
Banguino brings the most popular hobby and DIY development platform in the world into a single chip DTX module and offers full backwards compatibility with the most used worldwide Arduino board – the model ‘Uno’.
Bonus features include an on-board power supply to generate +5V and +3.3V to the user’s external circuit, a microSD connector and additional 10 configurable digital I/O ports. There are also two software controllable LEDs on board as well as a USB-to-UART bridge. Banguino provides a highly integrated solution for building simple or complex circuits and benefiting from the large variety of already existing Arduino-compatible code.
Banguino – 8-bit Processing Module - [Link]
by deba168 @ instructables.com:
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 PWM charge controller.In April-2014 I posted my PWM solar charge controller designs on the web,it became very popular. Lots of people all over the world have built their own. So many students have made it for their college project by taking help from me.I got several mails every day from people with questions regarding hardware and software modification for different rated solar panel and battery. A very large percentage of the emails are regarding the modification of charge controller for a 12Volt solar system.
Arduino solar charge controller and energy monitor - [Link]