Category Archives: Comtemporary Art Project

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This week our interactive bin project is starting to visually and technically coming to fruition. The boxes have now been painted plus we have soldered all the LED wires  on the outside of the box that will house them, to longer wires to fit into the breadboard we have acquired.  We tested the LED’s with resistors that were slightly too high. This resulted in the LED’s dulling. After a bit of calculation we bought 180ohm resistors which fixed the problem. Here is a photoshop visualization of the final product in action. Gallery Scridb filter

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A Sense of Motion

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This week our Interactive 8Bit bin contemporary art project has started taking shape. The front panel that holds the perspex pixels has been CNC machined to perfection! We also re-appropriated an Airwick IR motion sensor to detect when rubbish is being placed in the bin. We changed our programming to accept the sensor into digital pin 2 and play a random LED sequence once the sensor has been activated. Another member of the group put together a a max patch that also plays random 8 bit (Chip Tune) sounds when the sensor is activated. It takes in a number of samples created using a plugin called Bitspeek within an Audio editing application. We also managed to get a fantastic speaker for a good price  Airwick IR Motion Sensor Test   Mighty Dwarf Speaker and Max Patch Test   An Example of the max patch   Photos Scridb filter

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Getting Practical

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This week we have been getting on with the build of our contemporary art project. We decided the best course of action would be to build the bin ourselves using recycled materials. We built the bin to the same scale as the matching 8Bit LED display so that they resemble large pixels. This week we also built the cardboard boxes that will house the LED’s. They will also have a diffusing material inside to spread the light evenly across the perspex cover. The perspex has has been sand blasted to also help diffuse the light from being a circular shape. We have programmed the Arduino Mega to generate a random number and display a particular light sequence depending on the random number. Another member of the class has taken PIR sensor from an air freshener. This sensor is exactly what we need as the LDR would mean we need a lid on the bin. We really would prefer not to do this as that would add another step to the person disposing the rubbish into a bin. If they can simply drop it in a box it may not deter them from doing it. This is about getting people to place their rubbish in a bin and not over the edge of the living bridge! During the Easter break we plan to come together to get the sensor set up to the sequences of the LED lights. We have ordered 30 LEDs from china and should be here within a week. When we start coming to the fruition of the build we will begin the promotion of the 8Bit Bin. Eimear has already began drawing up design of our 8Bit logo. Scridb filter

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Upsizing

Arduino Mega

Due to time constraints and resources our group began researching other methods of controlling a large number of LEDs. After trawling the internet I discovered the existence of the Arduino Mega. The Mega has 54 I/O pins which should be enough to run a 5×5 grid of LEDs and Earcons. Today in class Mikael pointed us in the direction of Nicholas Ward. Within an hour of us emailing Nicholas he arrived with the Arduino Mega. Scridb filter

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Multiplexed!

After taking a look into the technical aspects of our build we realized that the Arduino only has 13 outputs and we need 32. To over come this we have been researching a method known as multiplexing and charlieplexing. This approach allows us to regulate the 5 volts that the Arduino allocates to each pin on a clock to a number of LED’s using a shift register. Basically each LED is attached to one pin of the shift register and it is counting up to 8 bits and lighting each one incrementally. So fast that the eye can’t see the LED turn on and off. This is a very simplified explanation of multiplexing. Below is a video that goes into greater detail. below is an example of our attempt of using this method to light 8 LEDs from 3 Pins on the Arduino. We succeeded in doing this but it was very tedious and complicated with more the set up of electrical components over the programming aspect. With time constraints in mind we have decided to look into the Arduino mega.   Experiment Scridb filter

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8-Bit Classic

One of the large projects the iMedia class is undertaking is the contemporary art in the public realm waste project. The task is to change the publics attitude towards littering around campus. This could be an art installation or an interactive installation. Am example we looked at was BinIT.  This project consisted of a set of bins in Limerick train station. They had the ability to move and produce sounds independently. They would follow people who had littered around the station reminding them to place their rubbish inside the bin. They area around campus we chose was the living bridge. We discovered after interviewing one of the cleaning staff that it is a major trouble spot. He explained that the litter isn’t exactly visible as people passing by have a habit of throwing it over the bridges edge. After getting this insight we decided to visit the bridge ad document the bridge itself e.g. shape, length, foot traffic and amount of bins etc. We noticed there is not one bin on the bridge. Not even at the seating areas. With this information we chose to design a bin that attracted passers by to it. Maybe something with a visual rewards system that entices them to return or at least spread the word. The document above discusses our idea of our LED 8-bit Bin. We envision a bin with a small 8-bit LED matrix that attracts users. The 8 bit design will hopefully evoke a response from the target age group (18+) especially using matching chip tune earcons.  There 8-bit corresponding hanging display will have larger icons with a screensaver when the bin is not in use. Now to figure the build! Scridb filter

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