June 27, 2010

BreadBoard friendly Wii Nunchuk adapter

Planning to make some experiments with Arduino and a Wii Nunchuk (plenty of info in the web! just googling "Arduino Wii Nunchuck"), I needed a solution to interface easily with a Nunchuck without having to cut the cord or buying any specific extension cable or an adapter.

The interface of the Wii Remote where a Nunchuk is to be connected seems familiar:

It is similar to a Firewire (the following picture shows a standard Firewire plug, not a mini one):

and, in effect, the Firewire connector plugs-in very well :

That means the plug on the Nunchuck is almost similar to a Firewire plug:

Here's a closer view:

Since I had a broken old Firewire card lying around, I wanted to use the connector on that card:

So I desoldered it, and removed the metal shield case:

Gently folding the pins, it is possible to give them a form compatible with the BreadBoard holes. Moreover, this connector has some extra plastic pins that don't allow to insert it in the Nunchuk cable:

So I had to remove them:

Here is the connector. To perfectly fit the Nunchuk it is necessary to gently trim the width of the portion shown in the following figure:

It fits really well in the Nunchuk plug!

And it fits well on a BreadBoard, too!

Now it's easy to experiment...

June 26, 2010

Cheap RFID Reader

I got one cheap RFID reader from the bay (probably some old automotive surplus). This RFID reader is exactly the one discussed in this post on the Arduino Forum. Not too much info on it: some description and photo with possible modding.

It seems very interesting. Here is a picture mapping the internal architecture:

After configuring it, up to now I am able to let it recognize valid fobs and light the LED. Now I'd like to realize a security lock (pilot an electric bolt). I'd also like to connect it to Arduino to extract key fob info from it (as discussed in the forum, it generates the recognized unique fob code and also an internal-generated unique code).

UPDATED: it's not only on the bay. I eventually ended up discovering it's made in Germany (here) and it's very cheap.

June 6, 2010

Standing ovation for ARDUINO!

One very great tool to make experiments with!

Really astonishing! You can read the full history and characteristics HERE.

UPDATED: It finally happened I got one! An Arduino Duemilanove (2009 in italian).