Archive for March, 2011

Arduino Candy Grabber, Web Controlled.

Thursday, March 31st, 2011

A step-by-step guide on controlling physical things (like grabbing candies with a mechanical arm) via Internet (please, try!).

In this instructable you will learn how to connect to your arduino and control it over the net, set up a video stream, and how to control stuff with your arduino all in realtime. I’ll try to show you on a concrete example how this could be done, but the code I used and wrote is going to be generic so you can use it for your projects. Note that I haven’t discovered anything new but rather used code that I found lying around the net, built from it and changed it fit my needs.

(…) So how should it work? The idea is that there is a Flash AIR app on my home computer that when a remote client connects to it starts the video broadcast. The communication between the client and the AIR app would be through a PHP socket because it can instantly push messages from one to the other. The socket will handle all the clients and the queuing. The Red5 server is used to handle the video broadcast, stream the video and send the arduino commands from the client that is first in the queue to the AIR app (although it could do so much more… we’ll talk about that in a later step). Finally TinkerProxy is used to send commands from the AIR app to the arduino that is connected to the same computer.

Thanks to Mario for the link!

via [Instructables], grab the thing [here]

Poster: Multiprocessor Arduino Robots (made by kids)

Tuesday, March 29th, 2011


Poster Complubot Soccer Light 2011

(c) 2011 Complubot

This is the poster made by Complubot to thank their sponsors for the support given so far. It illustrates the way the kids learn about computing, and how they build their multiprocessor robots. Click on the poster to download the PDF.


Spanish Interviews About Arduino

Tuesday, March 29th, 2011

In the last couple of weeks I have been interviewed a couple of times about the development of the Arduino project, the future of the platform, the importance of Open Source Hardware, and the implications of open licenses. If you understand Spanish you might be interested in listening to this podcast by Jorge Barrientos, or reading this article by Alan Lazalde.

You can also follow the podcast directly on our website:  Entrevista a David Cuartielles @ Medialab Prado 25-03-2011 by laguna


Samsa II, The Hexapod

Tuesday, March 29th, 2011

[pabloxid] shared an Hexapod project on the forum based on an Arduino MEGA 1280 and 18 Dynamixel AX-12 motors:

SAMSA is based on the Wiring board, with an ATmega128 microcontroller, and SAMSA II on the Arduino Mega, with an ATmega1280. Both are pretty similar, tough the ATmega1280 has 8 KB SRAM, twice the ATmega128. For SAMSA II the Arduino IDE was not used. The software was written directly in C++, using some libraries from both Arduino and Wiring.

SAMSA II has also two additional microcontrollers. One is an old Arduino Mini (ATmega168) located in the head, tasked with handling the sensors. The other is an ATmega8 and is integrated in the display. The firmware in the display was replaced with another one, freeing the main microcontroller from handling the display pixel by pixel, storing the frame buffer, etc.

The head’s microcontroller is responsible for sampling, filtering and processing sensor’s data. The data from the Sharp distance sensor and the lateral IR sensors are combined in a single “super smart distance sensor”. This microcontroller also decodes the data coming from the 38 KHz IR receiver, used for the Remote Control.

These two additional microcontrollers further reduce the load on the main microcontroller, allowing for more sophisticated behaviours.


Massimo Alla Fondazione Rumor, Vicenza.

Tuesday, March 29th, 2011

Massimo é stato invitato dalla [Fondazione Giacomo Rumor] – Centro Produttività Veneto – a spiegare  Arduino e l’innovazione distribuita dell’Open Hardware. L’incontro, di due ore, si terra a Vicenza giovedì 31 Marzo, alle ore 18:00, presso il Viest Hotel (Strada Pelosa 121 – Vicenza).

Vi aspettiamo numerosi!

Scarica l’invito [qui], [thread di Pitusso sul Forum per incrociare la Comunità]

K3 – Prototyping Show Announcement

Monday, March 28th, 2011

K3 PP1 End Of Course Show

During the last year Tony Olsson has been teaching the Physical Prototyping courses at K3 – The School of Arts and Communication, at Malmo University, Sweden. My former student and now colleague is making a terrific job in introducing the students to design concepts and how to materialize them. This year’s brief invited the course participants to research new ways of visualizing data in physical ways. If you happen to be close to Malmo, feel free to pass by the show this Wednesday afternoon. Here the invitation:

PP1 2011

Its that time of year again. The sun is shining, the flowers a slowly waking up and it is time for the annual Physical Prototyping 1 final show. This year the first year students at the Interaction Design course at k3 have been tackling the topic of Physical Data Visualization. On Wednesday 30/3 at 16.00-19.00 they open up the doors at Malmö Högskola and will bring you the latest in novel human computer interaction and data visualization.

So join the data flow to Östra Varvsgatan 11 (Karanen Bulding) and partake in this one day only exhibition.

where?: Östra Varvsgatan 11, C floor infront of the boat.

when?: Wednesday 30/2 at 16.00-19.00

RFID-based Dispencer Answers To The Question: Did I Already Take This Pill?

Friday, March 25th, 2011

[Mark Fickett] shares a nice solution to keep track of  pils and medecines his mother takes.

When taking her battery of medicines, my mother occasionally loses — or, lost — track of which ones she had already taken. This aims to keep track of what’s been taken (and how recently); and also to provide a night light, as long as it’s taking up an electrical outlet.


Arduino Computer Vision With Video Experimenter Shield

Thursday, March 24th, 2011

[Michael] posted some interesting uses of Nootropic’s latest shield, the Video Experimenter Shield, besed on a LM1881 video sync separator to detect the timing of the vertical and horizontal sync in a composite video signal. It’s one of the few examples of Arduino processing a live video signal, as previously seen with the Eye Shield (based on the same IC, but with no video out implemented). The image here is processed and sent out from the Arduino using a custom version of the TVoutLibrary. Wow.

The Video Experimenter shield can give your Arduino the gift of sight. In the Video Frame Capture project, I showed how to capture images from a composite video source and display them on a TV. We can take this concept further by processing the contents of the captured image to implement object tracking and edge detection.

The setup is the same as when capturing video frames: a video source like a camera is connected to the video input. The output select switch is set to “overlay”, and sync select jumper set to “video input”. Set the analog threshold potentiometer to the lowest setting.

Please have a look at the other examples, such as edge detection, and using the shield to Decoding Captioning Data inside the signal.

via [nootropicDesign], also [Video Experimenter Project Page]

Libelium Develops Sensor Networks To Help Japan Detect Radiation

Thursday, March 24th, 2011

Arduino distributor Libelium is developing a new sensor board including a Geiger tube to detect alpha, beta and gamma radiation. The board is going to be releades open source.

Once the first prototype is finished it will be sent and tested in the Hackerspace at Tokyo. This new sensor board will be compatible with both Waspmote and Arduino platforms. The idea is double, on the one hand, with the Arduino platform people will be be able to have easily running their own detector at home; on the other hand, with the Waspmote platform authorities and will be able to deploy autonomous sensor networks to send the radiation levels from dangerous areas using ZigBee and GPRS technologies.

If you are interested and want to collaborate with this project please contact David Gascón, Libelium CTO here.

via [WSNblog]

Gameboy ROM backups using an Arduino

Wednesday, March 23rd, 2011

[Alex] collects retro gaming consoles. One day while playing a SNES title, his save games got wiped when he powered off the system. It turned out that the battery inside the game cartridge got disconnected somehow, and it got him thinking. He decided he wanted to find a way to back up his save games from the cartridges for safe keeping.

While cart readers exist, he says that they are hard to find nowadays, so he decided to construct his own using an Arduino. SNES cartridges are relatively complex, so he opted to focus on Gameboy cartridges for the time being. Before attempting to back up save games, he first chose to learn how to communicate with the cartridges in general, by reading the ROM.

via [HackADay]