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Arduino Day - Weekly RecapMarch 27, 2015

So tomorrow is Arduino Day, ten years already! To celebrate this event we bring you some Arduino hacks that will surely help you through this day to have the best time possible.

Arduino Digital Magnetic Compass

You should know by now there's a lot of Arduino Day events scheduled for tomorrow. Maybe you're not really sure how to get to one. This first project is ideal for you: a digital magnetic compass developed with Arduino that will guide you around.

M. Vasilakis build his own circuit, based on Arduino, using a HMC5883L sensor board and an ATmega328p.

The HMC5883L is a triple-axis digital magnetometer designed to detect magnetic force. It communicates through I2C and it's important to keep it on a flat surface and parallel to the ground.

Arduino Digital Magnetic Compass

It uses an old Nokia 5110 display to plot the data and a couple of push buttons to select the type of visualization and to turn on the display LEDs.

Posted on Instructables.

Watch it on YouTube.

Be a good host: Automatic Tea Maker

Maybe you are helping to organize an Arduino Day event and you want to make a good impression. This project is perfect for such an occasion: an automatic tea maker.

Automatic Tea Maker

The enclosure and the parts that clip on the cup and do the tea dipping are all 3D printed . It is powered via USB cable and controlled with an Arduino Mini and a servo.

It includes a potentiometer to select the time you need for your tea and a 16x2 LCD to visualize it (it also gives you advice on the most appropriate kind of tea for a selected time). It has a start button and a speaker to warn you when your tea is ready.

Find out more here.

Pet Feeder

Are you going to be out all day tomorrow? If you have a pet you surely know the consequences it may have. Don't worry, the Croccolino Pet Feeder is the solution.

Arduino Pet Feeder

This project is a little bit more complicated than the usual but it has everything you need. It is built around an Arduino Yun and it allows you to select up to 8 scheduled feeds a day and the quantity for each feed. It shows the water and food levels in a Nokia 5110 display and you can adjust the time and scheduling with a panel of buttons.You can even record your voice to call your pet to eat with an amplified speaker and it has an integrated web server.

The list of materials, apart from the plywood to make the enclosure, is huge: an Arduino Yun, a microSD card, two weight cells, a SD 1820 audio module, etc.

Check out the complete project, it's really worth the effort.

You can read more Arduino hacks here.

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