Studio Contrechoc

design & textile & technology entries

Monthly Archives: October 2010

Chatting Pepper pot

This small project is having fun with wireless using the most common things like a pot with colorful peppers. The idea started when I added a single LED into this pepper pot, the LED having the same size as the peppers, but just lighting up! It is a wonderful detail in this nice pot.

I wanted to do more with this idea and started soldering 9 LED’s to a bare bones ATMEGA328.

Also you can see the transceiver RF12 attached.

The transceiver waits for the right words and lights up the LED’s in a certain order. But then when receiving the word it starts sending pepper menu’s around! Or poems about recepies… great for in restaurants. Later on during diner the pepper pot will ask if the customer has enjoyed the diner….

So the idea of objects chatting, reacting and asking questions is explored, this behaviour of common objects will be quite normal in the future.

On this page:
I have shown a few of my latest wireless phantasies.
In this post some technicalities are documented.


Happy when Clapping Cap

This cap is specially made for artists! It gets happy when there is a lot of applauding and cheering going on, when not, the cap gets sad!

On this page:
I have shown a few of my latest wireless phantasies.
In this post some technicalities are documented.

Inside the cap there are a few electronic compartments, an ATMEGA328 as a center, accompanied by a RF12 transceiver, an ATTINY2313 for the steering of the LED’s in front and a Velleman Kit for capturing sound and giving this signal through to the ATMEGA.

The ATMEGA registers the number of times there is cheering, and saves this in its EEPROM. The next time the power is turned on, it remembers where the happiness indicator was!

The Velleman kit is using a voltage of 9V, which is a nuisance because the rest is running on 3V only. So this kit must be replaced by a more economically powered circuit.


Hybrid GPS jacket

If you add GPS to your jacket the jacket is definitively changed. It has a real side and a virtual side. So a jacket with two symmetrically identical sides is not possible anymore. The reason why I made a jacket from two existing jackets. This idea will be continued in dresses which will be made from two very different dresses, just by cutting them in two halves and sewing them together again!

On this page:
I have shown a few of my latest wireless phantasies.
In this post some technicalities are documented.

The electronics is added in five sided modules designed for the Connected Garments projects. These five sided shaped I have used in furniture which I made for an installation and also in other projects:

The chair, made from 5 sided shapes was for a theater project in Lille, France, the cardboard shapes (alternating squares and pentagons) for an installation in Olomouc, Tscheque Republic, and the Penrose tiling for an installation in Dunkerque, France.

This module is used for protection of the electronics and as a design shape. There will be three modules on the hybrid jacket, because a third will be added on the blue side.

At the moment in an existing pocket on the blue side we have double digits running on an ATTINY 2313. These digits can be added easily to cloth because the LED digits can be put through the cloth inside the IC holder. At the back of the IC holder there is the ATTINY2313.

The digits can run on abstract mode and on number mode.

The five LED number displays are steered by another ATTINY2313 which sends it signals to the five displays using UART.

There will be a review of the interaction between the digits and the GPS side. These two sides will probably be connected using two transceivers. The idea of parts of clothing communicating between them has interested me a long time. It paradoxically gives the clothing more individuality when there are parts forming a whole.

GPS banana

Ever thought about what a GPS could mean for a banana???? Well I did!

On this page:
I have shown a few of my latest wireless phantasies.
In this post some technicalities are documented.

This post is about the banana remembering its travels around the world which are recorded by GPS, before being eaten in a town somewhere in the Netherlands…

Start with a banana: the best I found is a banana to fry in a frying pan. (Delicious to add to your diner too!).

Cut out the opening for the display carefully and remove the inside. Then add the ATmega328, the GPS module, the transceiver module and the ATTINY2313 driving the Liquid Crystal display.

I have the ATTINY 2313 driving the liquid crystal display using UART, the TX of the ATmega328 connected to the RX of the ATTINY, the PortB of the ATTINY driving the display.

So we need only one wire besides the Voltage and the Ground to the ATTINY. The GPS is also talking serial to the ATMEGA, but this is done using softserial.

The transceiver RF12  is connected using

PB5 to RF12
PB4 to RF12
PB3 to RF12
PB2 to RF12
PD2 to RF12

It is a bit of detailed programming to get the number from the string the GPS module sends:

This is the output:


but you have to have a number for latitude and longitude to be able to see in which town you are. Typically for C you have to analyze the string, get the CHAR value and put this in the right digit of the LONG. A bit of a nuisance if coming from higher programming languages, but if you have seen the concept, it is easily done.

The output of the banana transceiver could be:

5156.25 688.31 … hola i am in Enschede
raised in Guadaloupe, and well educated
having seen the seven seas, survived many a storm
crossed the equator, love in all ports 🙂
to be eaten in Enschede, how sad :-(((

In the second version I added two RGB LED’s steered by an ATTINY 2313 using UART from the central ATmega328.

see the video on the above mentioned page 🙂 or youtube, see lin at start of document.