Browsing articles from "March, 2010"

Working with LEDs and Resistors

Mar 13, 2010
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The objective of this text is to help you to understand how Resistors work and use it in it’s most simple use, as a current limiter. If you want to know more about resistors and leds, check Here and Here.

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Speeding Up a DC Engine with Magnets

Mar 13, 2010
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Electromagnetism is fun!

Building an Breathalyzer with MQ-3 and Arduino

Mar 7, 2010
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During the First Meeting of Electronic Arts in Florianópolis, we built a Breathalyzer using the Alcohol Gas Sensor MQ-3 and a Arduino Board to use in the last day of the meeting, in which we gave a party. You can see a quick video two posts below. Last days I received many emails asking for the code or how to make one, so I decided to build the sensor again, take pictures/videos and make a tutorial showing how you can make one, so here it is.

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