My moodlamp project

This is a project I have for quite a long time, since before I knew how to use microcontrollers. Now I may study chromotherapy to apply the lamp for this techniques. For now I have it on my room, that I use to relax and it works!

What do you think?

Working with LEDs and Resistors

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

Electromagnetism is fun!

Building an Breathalyzer with MQ-3 and Arduino

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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Campus Party Brazil

Hi everyone, I am blogging live from the CampusParty Brazil 2k10 in São Paulo – Brazil, it’s something like a Lan Party but full of presentations, concerts and of course downloading… We have here a 10GB BandWidth internet, and there’s a TV screen showing the bandwidth consumption, and we haven’t used more then 3GB at the same time. (I’m trying my best to beat the record). Another thing that I found cool is that someone started a DC++ Servers, and there’s around 400 people connected to it sharing stuff fullspeed, soon my 500Gb Lacie Drive, that I brought with me empty will be full.

In case you are somewhere around the world and would like to download stuff from us, connect to the DC++ Hub cp2010.no-ip.org and download at a great speed.

Today morning there was some people doing Arduino projects, DIY stuff, Open Sorce presentations and much more. You can check LiveStreaming from the Campus Party Here.

Yesterday Kevin Mitnick was here giving a presentation about the art of deception, what a presentation, really good! If you would like to watch it, I am uploading it too, it’s worth it!

Also I am uploading my pictures to my Flickr acc.

Take care all, I will check my downloads now!

I Meeting of Electronic Arts

It happened last week, starting on Monday 11th January and finishing on Friday the 15th, the I Meeting of Electronic Arts, where people from many differet places of Brazil came to see what was going on. Our first idea was a meeting (de)constructive, build, hack, modify, learn, teach, freedom of knowledge. Several workshops were presented, Basic Electronics, Processing, PureData, and others (the videos of the presentations will be distributed when people finish editing).

On Tuesday night we made a walking trip crossing the dunes till we find Joaquina’s beach. After swiming in the cold waters, we walked back on a thick rain, amazing, it was long ago since the last time I walked on the rain wanting it!

We learned/teched a lot in this event, one thing that we’ve noticed is that creative minds work much better after midnight. There was no point planning anything for the morning because no one could wake up before 11h.

On Thursday night a party was organized, where we put in for a test some projects developed during the event, for example a Breathalyzer using a Alcohol Gas Sensor MQ-3 sensor, LEDs and an Arduino. By the way, never seen so many arduinos in one place, in different sizes and colors, beautiful!

You can check some pictures from my Flickr:

Here is also a Video from the Breathalyzer (I will make a post on how you can make one after the Campus Party next week)

Some more videos can be found on my Vimeo.

The Longest Way 1.0 by Christoph Rehage

Christoph Rehage had an idea of going by foot from Beijin to Germany. He took some shots on his way and afther the trip, made a video. I saw this today and got amazed, so I decided to share with you guys.

also I want to you all to have a Happy New Year and a great 2k10!!!

10 Cool things to do in OSX Terminal

The thing that made me buy mac is that it has a OS based on Unix, and programs like Photoshop and Microsoft Office (not a big OpenOffice fan yet). Like a good nerd, I can’t live without my beloved terminal, which makes my life easier. In this post I will show some commands so you can have fun on mac’s terminal. Hope you like it, and if you have any other ideas, please comment on the post!

1. Twitter Update

Nothing more geek than updating your twitter from terminal. Just change the user e pass from the code. Way cool.
curl -u user:pass -d status="Tweeting from the shell" http://twitter.com/statuses/update.xml

2. Sing songs

Release your creativity, sing along.
sudo osascript -e 'say "Dum dum dum dum dum dum dum he he he ho ho ho fa lah lah lah lah lah lah fa lah full hoo hoo hoo" using "Cellos"'

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Rare Earth Magnets

This is a totally random movie I shot this morning after receiving some Magnets from DealExtreme. Tomorrow I will measure the force of this magnets with a “Gaussimeter”, then let you guys know.

Google: 13 years in 2 min

Great movie!