Making Things (Still) Light Up

Connecting up the breadboard to a microcontroller, in this case an Arduino, has opened up all sorts of possibilities! I’m still mostly tinkering with LEDs: making them light up, blink or neither. The simple on/off is an easy way to tell whether the circuit and code is successful.

First up: simple blinking. Based on morse code I made the LED blink out SOS. Short-short-short, long-long-long, short-short-short.

Blinking out SOS
Blinking out SOS

Next up, I was able to toggle between red and green LEDs by simply pressing a button. Taking this a bit further, I turned them into a little dance party.

Switching between green and red LEDs using the push button
Switching between green and red LEDs using the push button

(link to code)

An LED dance party - the button turns them both off
An LED dance party – the button turns them both off

(link to code)

Another challenge I tackled was the “on-off switching” in which pushing the button toggled (but sustained) the state of the LED. Initially I had trouble with this functioning reliably. The push button seemed to flip the switch to quickly, doubling over on itself. With a little digging, I figured out adding a delay() allowed the circuit to feed in the proper lastState information.

Unreliable input/ouput switch states
Unreliable input/ouput switch states
Successfully switching states with the press of a button
Successfully switching states with the press of a button

On Observation, The Technology of a Place

What is Technology?

As defined by the Oxford English Dictionary

the branch of knowledge dealing with the mechanical arts and applied sciences; and the application of such knowledge for practical purposes, especially in industry, manufacturing, etc.; the sphere of activity concerned with this; the mechanical arts and applied sciences collectively.

As defined by Wikipedia

technology is the collection of techniques, skills, methods, and processes used in the production of goods or services or in the accomplishment of objectives, such as scientific investigation.

Sitting in Washington Square Park, I hoped to identify a broad range of technology ranging from things that are conventionally recognized in today’s modern world (i.e. cameras and phones) but also considering latent technology that is materially embedded into the physical world (i.e. fountains, apparel, strollers).

The Fountain (and Children)

The most immediate evidence of technology in Washington Square Park is the fountain. Its splash, size and velocity make it unmissable – yet the actual technology itself that propels the water into the air and treats the water is concealed. What happens below the fountain? Where does the water come from and where does it go? What is used to treat the water, how often is the procedure done, and how does it change the chemistry of the water?

A note about the mass of children: are their identical shirts a technology? It allows their “herders” to identify them as a mass and spot them out in crowds. The uniform also gives the children a visual cue as to whom to follow. The shirts reduce the possibility of a child being separated from the group or being unable to find them in the event they are separated.

Umbrellas

The forecast for today is a high of 22°C, low of 16°C with a chance of rain. People are carrying unopened umbrellas. The piece of technology is held in anticipation until the current sunny weather changes. This umbrella has a curved handle which is comfortable when holding the umbrella open. However, when closed, the woman does not carry it by the handle. Instead she grasps the umbrella about a third of the way down the fabric portion with the handle wrapped around her arm. Perhaps when closed it is too long to carry from the actual handle or the swinging motion of carrying it by the handle is uncomfortable.

Coffee Cups

Many people are carrying disposal coffee cups. The cup, different than a mug in terms of how it is held, is still similarly insulates the hot beverage. A separate lid, attached to the top of the cup, prevents liquid spilling out but still allows for drinking. While walking, no one takes a sip. Some people multitask, operating a mobile phone in the opposite hand. Some coffee cups have sleeves, protecting their carrier’s hand from the heat.

Bags

So many bags! A plastic bag is carried in one hand, with the grasp holding two handles. There are backpacks, enabling people to be hands free. There are single-shoulder bags, which are also hands free. However, when people carry the bag in a way it was not designed, their physical engagement with it changes. One man with a back pack is only using a single strap and thus uses a hand to maintain its position on his shoulder. A woman pulls a suitcase. It has four wheels on the bottom and an upright handle. The drags the bag behind her, riding along on only two of the wheels.

Animals

A simple piece of rope connects the bird’s ankle to his owner’s wrist. This prevents the bird from flying away but could potentially injure the man if the bird were to take off quickly and with force.

Washington Square Park

Many of the technologies identified don’t have digital interfaces. They are objects or tools. Yet we know how to use them. The coffee cups, despite not having handles, are known how to be held. people use their whole hand, not just a few fingers. The backpacks have two wholes through which our arms fit and can be adjusted based on different sized torsos. Physically, these objects communicate their function and also how they are to be used.

BERG’s Little Printer

We’re interested in this idea of ‘the weather’, of the inherent conditions of something. You can think of things having a weather, just as places do, and you usually just have to work with it. If you’re a coder, you have to work with the weather of the Amazon S3 server…We opt to be part of the cultural landscape. We’re obsessed with these ideas of the near future, of the universe next door, by extrapolating peculiar edges

From “Little Printer: A portrait in the nude”, Domus

In an interview with Domus, Jack Schulz of BERG describes the five-year design process for bringing the Little Printer to fruition. Unfortunately the Little Printer is no longer available.

Matt Webb, also of BERG, wrote an early blog post about the idea in 2006. He imagined it as a “social letterbox”, in which other people could print things directly to you, rather than simly emailing or uploading to a shared folder.

All of this points to a very different product from the present-day desktop printer. It could be done today–printer manufactures could bundle social letterbox software with their devices, just as digital camera manufacturers bundle photo management applications. But I think that’d be missing the point: the social interactions change the physical device itself.

Making Things Light Up, Part 1

Having a single LED turn on was no problem: bring over power (5V) and ground from the Arduino, add a 220 Ω resistor, connect the LED to power and ground. Light!

Powering an LED
Powering an LED

Adding a push button complicated the circuit. Initially I had wired in the circuit in such a way that the default state for the LED was on, and pushing the button turned it off. Originally I thought perhaps this was a property of the switch itself. Digging into the switch, I realized that I had placed the LED in the same row as where I had located the resistor. However, when I moved the LED to the other row of the switch, it worked as expected.

Simple push button
Simple push button

Wiring multiple switches in series and parallel was fairly straightforward once I understood how the electrons flowed through the push button. For demonstrating a series circuit, I wired the output of each switch to the input of the following switch.

Three switches in series
Three switches in series

To complicate the series, I also added an LED at each switch, showing that the last LED (green) would only light up when the other red LEDs were also lit. Lesson learned: use a tripod when shooting video, one usable hand is not enough!

Switches in series with multiple LEDs
Switches in series with multiple LEDs

In parallel, I wired up an LED to each switch—whoops! I realized in hindsight that it was meant to be a single LED. However, the circuit still worked as expected. Had I just used one LED, I would have had to wire the output from each button to a new row that the LED was connected two—allowing either button to turn on the LED. Next time!

Parallel Circuit
Parallel Circuit

Part 2: making my own switch coming soon!

Making Things Light Up, Part 2 (Or, The LED Piggybank)

Basic wiring
Basic wiring

A switch can simply be considered as two pieces of conductive material being separated and then brought together. In order to make a homemade switch, I turned to my pocket: coins are conductive!

Using a quarter and tinfoil, I rigged up a light-up “piggybank”. When a coin is dropped through the slot, it bridges the gap between two separate pieces of tinfoil, thus closing the circuit and illuminating the LED.

Close-up showing separated tinfoil portions and overlapping quarter
Close-up showing separated tinfoil portions and overlapping quarter

Before assembling the final enclosed “design”—what would Dieter Rams say!?—I tested the circuit by attaching one wire to a quarter and then another to a piece of tinfoil. When I lifted the quarter, the LED turned off and likewise, when I dropped the quarter on the tinfoil the LED illuminated. It was enough to prove that a quarter and some tinfoil would do the trick!

Early prototype with exposed quarter and tinfoil
Early prototype with exposed quarter and tinfoil

Still, hiding the tinfoil beneath some cardboard feels a bit like putting lipstick on a pig!