fromCONCENTRATE » digital

DOING progress…

John_0 — Wed, 02 Jun 2010 13:24:46 +0000

here is a quick summing up of my progress in developing this ‘augmented inadequacy’ device for my DOING assignment:

Progress…

1. Arduino —> Programmable Display

I used this LCD display:
http://www.coolcomponents.co.uk/catalog/product_info.php?cPath=45_71&products_id=151

And this tutorial helped a lot: http://www.arduinoprojects.com/node/13

Problems:

* need to make secure connection to LCD

* need to control contrast of LCD

Code already called the LiquidCrystal library at setup and interfaced seven of the arduino digital pins to the LCD:

// include the library code:
#include
// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(2, 3, 4, 9, 10, 11, 12);

I put the wire controlling the LCDs contrast (pin 3 on the datasheet excerpt below) into the arduino digital pin 5:

// contrast variable to digital pin 5
const int contrastPin = 5;

And then established the best contrast level for this 16×2 LCD using PWM (which runs from 0-255) via analogWrite – 118 seemed a good value:

//PWM value
analogWrite(contrastPin, 118);
//info http://arduino.cc/en/Tutorial/PWM

* need to work with Arduino Nano

* http://www.arduino.cc/en/Main/ArduinoBoardNano
* http://www.ladyada.net/learn/lcd/charlcd.html
* http://www.maplin.co.uk/Module.aspx?ModuleNo=1500

2. Programme —> allow switching of display

(Demo with tilt sensor shows principle)

3. Transmit / Receive Infra-Red Signal

bought these IR components:

http://www.maplin.co.uk/Module.aspx?ModuleNo=10379#features

sought advice here:

http://tthheessiiss.wordpress.com/2009/08/05/dirt-cheap-wireless/
http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1235097384

got stuck!

tried this instead:
http://www.instructables.com/id/How-to-make-an-arduino-IR-link/

but also does not seem to work :-(

4. (received vibration motor – have not yet integrated into programme)

5. Cut out a simple housing on the laser cutter to demo the concept and give an example of layout:

IR transmitter and receiver mounted above and below electronic display. (I added a button to the bottom right which would allow the device to be triggered ‘manually’ by the wearer themselves.)*

*added later – in retrospect, the last minute addition of a ‘manual’ button, allowing the wearer to trigger the device themselves is totally unnecessary and undermines the concept of the device.

Invented in 1994 and very popular in Japan for ages, QR codes* are increasingly being adopted in the UK by cultural institutions and corporate entities alike, signposting participants/consumers to additional ‘digital content’ accessed there and then on their mobile phone (typically a website or application providing further information).

QR codes were originally a tool devised for global logistics – the primary function of these markers is to reduce unique artifacts in ‘real space’ to mere place-holders for a meta-data doppleganger within a digital database.

I happen to think that QR Codes might be a rather useful thing, by the way, but I’m also interested in how such signs might be subverted or hi-jacked to tell alternative stories.

I thought that it might be interesting to use these codes (which are free of licence) and try to create an interesting poetic and conceptual feed-back loop for unsuspecting users:

Scanning the QR code below…

…takes you to a single page website (demo here.)

I made stickers ov the code…

…with the intention that these will be stuck over existing corporate and cultural portals wherever they may be found.

The stickers intefere with user-requests for more information and offer a re-direction service to the immediate ‘now’.

The reassuring ‘you are here’ red dot – typically a feature of tourist maps – is recontextualised as a kind of confounded statement; “but you are here?” “you don’t need anything else” “this is enough.”

I hope that the stickers can create some interesting temporary disruptions into otherwise smooth transitions away from our present moment.

You can download the template for those here: QRtemplatefinal.pdf

(use Matt White Waterproof Labels in laser printer.)

*QR CODES: Davey Smith wrote various posts about them/I’ve mentioned some uses of QR codes previously over here /and if you’re not at all sure what I’m talking about take a look at the the wikipedia entry /or take a look at a can of Pepsi!

Analog to Digital

John_0 — Wed, 09 Dec 2009 13:42:33 +0000

Cheap potentiometer only does part of a turn – need ‘continuous’ turn to realise piece.
Went shopping for continuous potentiometer – consumer approach – but was informed that such components don’t tend to be stocked – insufficient demand.

Assumption – scarcity means that ‘continuous potentiometer’ requires ’special’ technical facility.

Jamie – probably just something in there stopping it going all the way round…

Take apart – discovery – OBVIOUS! – ‘afraid to look under the hood’

Now – Arduino needs to communicate with MAX over SERIAL port – Short answer – NOT WORKING!

Joey provides workaround in shape ov OpenFrameworks application (have the feeling I’ll be using O.F. a lot more…)