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5 May 2011

Arduino to Twitter over USB [via]

I created a tutorial to guide you through the process of integrating Twitter with your Arduino without an ethernet shield. All you need is an internet-enabled computer. I hope some of you find it helpful. Feel free to offer comments or suggestions.

Arduino to Twitter over USB – [Link]

4 May 2011

The project is designed to control an heating system in order to keep the temperature in a room above a certain value, which can be set from Internet or a Personal Computer by LAN, because ours is not a simple thermostat but a complex unit managed by Arduino, which can connect to a local network with ethernet interface.  The thermostat allows many functions, including the publication  temperature measured at regular intervals (set by firmware), as well as the state of the boiler (on or off). The datas are published on the website http://www.pachube.com, which provides a database which stores user data, also makes available a series of gadgets to be able to view this data directly into web pages.

Web thermostat with Arduino – [Link]

4 May 2011

Mike’s app melds Apple iOS stuff with an Arduino: [via]

I wrote an iOS app find my Arduino over Bonjour and talk to it. It’s call Ciao, and the App Store approved it last Thursday.

Ciao makes it easy to talk to your Arduino from your iOS device. Load one of the example sketches onto your Arduino, and Ciao will automatically find it over Bonjour. You can use Ciao to control your Arduino or get live information from your Arduino.

iOS Arduino control app – [Link]

3 May 2011

labIII, the Laboratory for Experimental Computer Science at the Academy of Media Arts Cologne, posted this tutorial on how to generate sine waves with an Arduino using the Direct Digital Synthesis method. They explain:

Here we describe how to generate sine waves with an Arduino board in a very accurate way. Almost no additional hardware is required. The frequency range reaches form zero to 16 KHz with a resolution of a millionth part of one Hertz! Distortions can be kept less than one percent on frequencies up to 3 KHz. This technique is not only useful for music and sound generation another range of application is test equipment or measurement instrumentation. Also in telecommunication the DDS Method is useful for instance in frequency or phase modulation (FSK PSK).

Arduino sinewave generator – [Link]

3 May 2011

Paul Asselin says:

I wanted to know how much time I was spending under the shower each day, especially in these environmentally conscious times. The benefits of that are that I can perhaps save some money on the water bills and also study the effect of temperature on my showering time.

So Paul designed this Arduino shower timer analyzer. He considered using a water flow meter, but opted instead for using an RFID reader and a Real Time Clock (RTC). He waives his RFID card before the reader upon entering the shower which starts the timer. When he leaves the RFID reader again detects the card and stops the time. The duration is then uploaded to the Thingspeak website’s API section via an ethernet shield. [via]

This was Paul’s entry into the Thingspeak contest.

Arduino shower time analyzer – [Link]

1 May 2011

dangerousprototypes.com writes: [via]

Nanode is a low cost Arduino-like sensor node board intended for web connectivity applications. It allows you to develop web based sensor and control systems – giving you web access to six analogue sensor lines and six digital I/O lines. The schematic and other details can be found on the project’s Thingiverse page. The code can be found here.

This is an open source project conceived, designed, manufactured and coded by London Hackspace members.

Nanode: networked Arduino node – [Link]

29 Apr 2011

adafruit.com writes: [via]

Converting an Arduino to 3.3V – All official Arduinos run on 5 volts, which for a long time was the ‘standard’ voltage for hobbyist electronics and microcontrollers. But now the coolest new sensors, displays and chips are 3.3V and are not 5V compatible. For example, XBee radios, and SD cards and acellerometers all run on 3.3V logic and power. If you tried to connect to them with 5V you could damage the internals of the accessory. We use chips like the CD4050 to do level conversion but if you are using a lot of 3.3V devices, maybe you’re just better off upgrading the entire Arduino to run from 3.3V! To do that, we will replace the regulator so that the DC barrel jack for a 3.3v type, and then reconfigure the 5V usb power line so it goes through the regulator as well.

Converting an Arduino to 3.3V – [Link]

29 Apr 2011

Getting Started with Arduino (in Praise of Adafruit) @ Continuations. Albert writes – [via]

I am currently reading James Gleick’s “The Information,” which I highly recommend (more on that in a separate post). In it is a wonderful chapter on Babbage and Lady Ada Lovelace, which makes it clear how amazing her insights into what we would call programming were by placing them in their historical context. What does any of this have to do with Arduino? Well, I ordered our Arduino kit from the wonderfully named Adafruit in New York which was founded and is run by Limor Fried.

I can wholeheartedly recommend the entire experience. Ordering off the site is easy and fulfillment was incredibly speedy. The basic Arduino Experimentation Kit contains everything you need to get going and do so without any need for soldering. It comes with a simple plexiglass platform on which you mount the Arduino board with a couple of screws and next to it a breadboard which has an adhesive backing. All of this is accomplished in minutes. The instructions that come along are clear and easy to follow. The cut-out wiring diagrams are in color and fit the bread board perfectly.

Getting Started with Arduino – [Link]

17 Apr 2011

Mike Chambers writes:

Here is how it works. I have an Arduino Duemilanove with ATMega328 which has two photo-resistors connected (with a 10k pull down resistor). I set up two laser pointers to shine a laser directly onto the photo-resistor (which is enclosed within a dark box). The Arduino monitors the values returned from the light sensor, and watches for any changes that indicate that the laser bean has been broken. When both laser beams are broken, the Arduino calculates the amount of time between when each sensor was tripped. It then sends that value to the Adobe AIR based client, which is connected to the Arduino via USB / Serial port and a serial port proxy (in the case, TinkerProxy).

Arduino based speed detector with a Flash! – [Link]

15 Apr 2011

Tokyo Hackerspace has developed a Geiger shield for Arduino, designed to work with the RDTN/Pachube radiation detector project. Akiba writes: [via]

This is an Arduino-based geiger counter shield that makes it easy to upload data to the internet and also interchange tubes. Since it’s open source and Arduino-based, its also easy to hack this to other interesting applications.

Tokyo Hackerspace Geiger Shield for Arduino – [Link]





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