Category: F2025 – Mang

Physical Computing’s Greatest Hits (and misses)

I think my main takeaway from this reading would be that we could have interactions but what’s more important is for those interactions to be meaningful.I liked how he pointed out that waving your hand over a sensor “has little meaning by itself.” As creative coders, I think that’s such an important reminder. It’s easy to get caught up in cool tech and forget the why behind our interactions. If the action doesn’t hold some significance, it ends up feeling more like a CS demo than an expressive piece (no shade, I’m a CS major myself).

The part about video mirrors also really resonated. I totally agree. They’re super visually engaging (who doesn’t love staring at themselves?), but there’s not much to do. It reminded me of our early class discussions about high vs low interaction. Just because something responds doesn’t mean it creates depth. And also I think mirrors are often more reactive than interactive.

I loved the section about interactive pets, especially since I’m not really into real animals. The idea of a cuddly robot pet that behaves like a dog but doesn’t shed or poop? Count me in.

Making Interactive Art: Set the Stage, Then Shut Up and Listen

I found this reading really refreshing because it reframes the role of the artist in interactive work in a way that feels freeing. The title, Set the Stage, Then Shut Up and Listen, is blunt, but it hits hard. It’s such a shift from the traditional idea of art being about your expression, your vision, and instead saying, “Hey, I’ve built the framework,  now let them do something with it.” That resonated with me and also reminded me of the advice Professor Mang gave us when presenting our mditerm projects, letting our audience interact with our projects, without any additional instructions or explanations. While it can get frustrating if the audience doesn’t interact the way we expected, I think that’s where we actually find room for improvements in our work. Also, if they don’t interact in the way we expected them to, maybe it’s because we didn’t design with them in mind.

I agree with the idea that interactive work is the beginning of a conversation rather than the whole message. It means not trying to force people into a specific reaction, but creating space for them to explore and find their own meaning. That kind of openness can be scary, but it’s also really exciting.

I also really liked the part about using space and affordances thoughtfully. Like, if something has a handle, we naturally want to grab it. That kind of design isn’t just about aesthetics, it’s about instinct and behavior. As someone making interactive things, I think the key takeaway for me is the shift in mindset, moving away from a rigid, outcome-driven approach where I expect the audience to engage in a specific way, and instead embracing curiosity about how they actually interact. It’s less about forcing a response and more about observing what they do, learning from it, and letting that shape the work.

You know those days when you’re going about your day, composed, unfazed, maybe a little affected by how things are going,  a compliment here lifts your mood a bit, an awkward text there dims it slightly. Nothing dramatic. That’s me, most of the time. Collected. Measured. But then someone says something, or does something, and boom, something inside flips. And I get  triggered (Only a good squash session can fix that).

That’s the idea behind this project, the emotional snap, that flips from calm to intensity. The potentiometer controls a blue LED, which I chose because blue is often associated with calmness (or at least that’s the association I have). The idea is: when things are calm, you’re still feeling things, but softly. You turn the dial, and the blue LED glows brighter or dimmer depending on how strongly you’re feeling. It’s gradual, and ever-changing, just like most of our emotional states.

But then there’s the toggle switch. 

When flipped UP, it triggers a red LED, one that doesn’t fade in or out. It’s either ON or OFF. That red LED represents those intense moments of anger, panic etc. The contrast here is what makes the circuit special. On one hand, you have the blue LED, whose brightness gently flows with the potentiometer, like your emotional depth shifting over time. On the other, the red LED is binary, triggered by the switch, like someone pushing a very specific emotional button.

So this project is a metaphor for the way we, as humans, respond to the world around us.

The code for it:

int potPin = A0;      
int switchPin = 2;     
int redLED = 9;      
int blueLED = 10;    

void setup() {
  pinMode(redLED, OUTPUT);
  pinMode(blueLED, OUTPUT);
  pinMode(switchPin, INPUT);   
  Serial.begin(9600);
}

void loop() {
  int potValue = analogRead(potPin);
  int brightness = map(potValue, 0, 1023, 0, 255);
  int switchPosition = digitalRead(switchPin);
  if (switchPosition == HIGH) {
    //Red LED ON 
    digitalWrite(redLED, HIGH);
    analogWrite(blueLED, 0);
  } else {
    // Blue LED with analog control
    digitalWrite(redLED, LOW);
    analogWrite(blueLED, brightness);
  }
}

The schematic design:

Video Demo:

IMG_0611

 

 

For Tigoe’s “Physical Computing” piece, one of the quotes that stood out to me was the idea that pretty much everything physical computing-related has already been done before, and if it hasn’t, many aspects of your idea are inevitably going to be unoriginal, and that is okay. The main message I got from this piece was that there are endless ways of remixing things using the same concepts you see– your specific combination of physical computing-ideas is going to make your idea.

Out of the motifs he listed, I thought the tilty stands/tables were the most amusing to me. The first reason why is because it reminded me of the game Super Monkey Ball, a game I loved as a kid; the second reason is because I’ve been wanting to integrate my old skateboard into our final project since the first class, and a skateboard is basically a “tilty table” you stand on. I hope to learn more physical computing skills to eventually create an interactive experience using my skateboard.

For Tigoe’s second piece, “Set the Stage, Then Shut Up and Listen”, the title immediately reminded me of the mindset I had to approach my midterm presentation with– if my game is good, I have no need to explain anything myself. Sure enough, that was roughly the mentality Tigoe was preaching here.

I’ve heard staying quiet and watching the experience can be very frustrating for many people, but my personal belief is that the frustration is an indicator of poor user experience design. My experience with watching has always been so much fun as I get to confirm my hypothesis with how the user interacts with the game.

For example, I wanted to create a situation where players would communicate “let me handle the red ball and you get the blue ball” in my midterm game’s co-op mode. The game would only start with one ball but a second one would spawn after the ball’s second bounce, which would hopefully prompt the players to coordinate whose responsibility the new ball was. When it came to the first ever playtest in-class, I was overjoyed when Yongje and Khatira said “let me handle the red ball and you get the blue ball” pretty much word-for-word.

However, I also recognize that not every system is foolproof as there are prerequisites I had not considered for understanding the game. Many people struggled to figure out what fingers to use to press WASD or the arrow keys so they would use one finger from each hand to press WASD separately and get really confused why the controls were so clunky. Obviously, WASD is a very gamer-coded instinct so anyone who inherently doesn’t play games would not understand to put their middle finger on “W” and ring and index fingers beside on the “A” and “D” keys respectively. That begs the question of whether explaining finger placement was necessary or whether there was an unforeseen restriction on who could enjoy my project.

 

Physical Computing’s Greatest Hits (and misses)

Sometimes I feel like the authors of our readings can read my mind. Usually, my first thought when thinking of a project idea is that I don’t want to do something that’s already done, but the author starts by saying not to think that way. I guess he is right, and that no work is ever truly ‘original’, but always takes inspiration from somewhere or something.

One of the applications of physical computing that really struck me was the Dance Dance Revolution. I realized that I never really thought much about the mechanics of it, but it’s crazy to think that just having a few switches on the floor managed to create this dynamic that took over the world. I also don’t think that I’ve ever encountered the theremin instrument, but it seems very interesting that even though it’s a physical object affected by your actions, you can’t actually think about the actions, but must actually think about the music.

The author’s section on Dolls and Pets also got me thinking about how that concept has evolved compared to the year 2008. The image in the reading shows normal dolls physically connected to a device, but nowadays we have toys with the screens built in, so that the doll/pet seems even more life-like. An example of this is the Eilik Interactive Robot Pet, which went viral on social media a while ago (I actually really want one, but they’re so expensive).

Making Interactive Art: Set the Stage, Then Shut Up and Listen

I agree with everything the author says throughout this reading, however, I do think that it’s easier said than done. He mentions, “Some will be emotionally moved, some will not get it, others won’t care.” This dynamic is why I believe that artists tend to offer interpretation notes about their artwork to their audience. I think it’s quite painful to see people not understand or not care about an interactive work you poured hours of your time into. Therefore, to save themselves from this struggle, artists tend to offer the script beforehand. On a similar note, this is also the approach I took with the first half of this class. Every time I showed someone my work, I would be quick to explain the concept behind it before they even began to explore, making sure that they didn’t do anything “wrong”. But after reading the insightful comparison done by the author between planning interactive artworks and a director working with actors, I think I’ve really understood that an interactive artwork is only completed by the audience’s curiosity. I’m excited to apply this new approach to my own interactive artworks, where the audience is nudged to discover the statement of the artwork by themselves.

For my project, I designed an Arduino switch using open-end wires that respond to the camera’s power state. I taped the wires to a digital camera so that when the camera is turned on, the wires disconnect and the LED light turns off, and when the camera is turned off, the wires reconnect and the light turns on. This created a simple but clever system where the camera itself acts as a physical trigger for the circuit. I really enjoyed experimenting with the setup, testing how small adjustments in the wire placement affected the light’s response. Since I’m passionate about photography, I wanted to combine my interest in cameras with my curiosity about electronics, and this project gave me a fun way to explore both creative and technical sides at the same time.

IMG_8468 (1) The video representation

For my creative switch project, I decided to use my elbows as the mechanism to turn the lights on and off. I attached copper tape to each elbow, with the ends of the tape connected to the circuit. When my elbows touched, the copper tapes made contact, completing the circuit and turning the light on. Surprisingly, I found that maintaining a steady contact between my elbows was more difficult than I expected. You can actually see in my video that my arms are shaking slightly, as it was challenging to keep them perfectly still while keeping the circuit closed.

 

 

 

For my project, I was inspired from the gym leg adductor machine where you have to close your legs against weight to work on your inner thigh muscle. I created the circuit just like in class but I added the 2 strips of copper tape on my inner thigh so that they when the legs were closed, the electricity would flow through. I also added crocodile clips just to extend the length of the circuit.

IMG_2157

I drew a rough schematic on how I wanted the system to work.

 

There is something profoundly magical about receiving affection: a hand that reaches out, a presence that wraps you in warmth, a small gesture that makes the world feel less heavy. Love, in its quietest form, has the power to make us feel seen, valued, and alive. Through my project, I wanted to explore that invisible current the emotional electricity that flows between two people who care for each other.

The interactive piece symbolizes the way love and connection illuminate us. When you touch the hand of someone you love, or even move close enough to feel their presence, your heart lights up  not just metaphorically, but literally within the work. The glowing heart represents how affection has the power to activate something deep within us, a light that reminds us we are not alone.

Demo Video:

 

Future Improvement:

If I had more time, I would have expanded the project to include sound and more expressive lighting to create a deeper emotional experience. I would have added soft heartbeats, ambient sounds, or even gentle whispers that respond to movement and proximity. As two people approach each other, the soundscape could evolve, symbolizing how connection changes both our inner feelings and the atmosphere around us.

I also would have made the heart light more dynamic by allowing it to change color and rhythm based on the kind of relationship or emotion being expressed. Warm tones could represent comfort and love, cooler shades could suggest distance or nostalgia, and rhythmic pulses could express moments of excitement and joy. These additions would transform the project into a poetic language of sound and light, a more immersive way to express how love and presence illuminate our lives.

 Step-On Switch:  An Unusual Arduino Foot-Activated Circuit

Video:

Overview:

For my first Arduino assignment, I created an unusual switch that does not require the use of hands. My switch is activated by pressing it with the foot, completing the circuit to light up two LEDs (red and blue). The idea was to create a physical interface that feels natural, intuitive, and accessible, something that could fit into everyday gestures like stepping, rather than pressing buttons with fingers.

Inspiration:

I was inspired to use the feet after thinking about how often we interact with objects using our hands, keyboards, phones, remotes,  and how limiting that can be. I wanted to explore another part of the body to interact with technology in a more grounded and physical way.
The foot felt like an interesting choice because stepping on something has a clear and satisfying feedback, it’s an action that already feels like a switch. Plus, it connected to the idea of accessibility, making a device that could be triggered without hand movement.

Building Process

Since this was my first time ever using Arduino, I learned a lot through trial and error and by asking questions in the IM Lab. I gathered all the materials from the lab, mainly cardboard scraps, metal sheets, and wires.

Here’s how I built it:

1. Base:
   I used a folded piece of scrap cardboard to create a “step pad.” The bottom layer held the metal conductor (two rectangular aluminum sheets), while the top layer acted as a flexible pressure surface.
2. Wiring and Circuit:
   I made my own extended wires since the ones in the kit were too short. Professor Mang showed me how to cut and separate the wires together safely. I then taped the two wires onto the cardboard so that when the top layer was pressed, the exposed wire ends touched the metal conductor, closing the circuit and turning on the LEDs.
3. Circuit Connection:
   The switch was connected to an Arduino Uno and a breadboard. I programmed it so that when the circuit closed (when someone stepped on it), both red and blue LEDs would light up.
4. Interface Design:
   To make it more intuitive and visually clear, I designed a quick cover on Canva that said “STEP ON ME,” giving the switch a fun and inviting personality. It also made the prototype feel more like a finished (polished) interactive product.

Overall Reflection:

I really enjoyed how hands-on this project was, literally using my feet instead of my hands. It helped me see how electronics can interact with the body in playful, unexpected ways. I liked that the result felt tactile and responsive, and it gave a sense of satisfaction when the LEDs lit up under my foot.

What I could improve next time:

• I would make the structure more durable using thicker cardboard or a sturdier base, since repeated stepping eventually weakened it.
• I wish I had more time to maybe figure out how to add all four different colored LED lights to make it look more visually appealing
• The wiring could be cleaner and more hidden, maybe integrated into the design itself for a more polished look.
• 

Schematic:

This schematic illustrates how my foot-activated switch completes the circuit to power the red and blue LEDs. The 5V output from the Arduino flows through the LEDs and a 330Ω resistor to limit current. The circuit remains open until the metal conductor plates make contact, this happens when I press the cardboard switch with my foot. Once pressed, the metal pieces touch, closing the circuit and allowing current to flow, which lights up both LEDs. This simple setup demonstrates the bones of how my arduino circuit work and was the plan I followed to make building this project much easier.

Conclusion

This project taught me the basics of Arduino, digital input/output, and how creative thinking can shape how we interact with technology. Building a switch with my foot instead of my hand made me realize that interfaces don’t always need to follow convention, they can be playful, personal, and unexpected.

I’ve always been fascinated by pressure sensors – the way a simple press or change in force can trigger something to happen. You see them everywhere: in home alarm systems, automatic doors, and even in those dramatic scenes from Mission Impossible, where a character steps on the wrong tile and sets off a trap. That kind of precision and sensitivity has always intrigued me. So, when I realized I could actually build one myself, I thought, why not?

The concept seemed simple enough at first: a pressure-activated switch that lights up an LED when you press on it. But I didn’t want to make something tiny that would trigger with a fingertip,  I wanted it to react only to real weight or force. My vision was to create a larger pressure pad, something that felt closer to those movie sensors that go off when someone steps on them. I figured, “How hard could it be?” Spoiler: harder than I thought.

In the beginning, I tried to build everything at once , the sensor pad made from cardboard and aluminum foil layers, and the circuit on the breadboard. The problem was, when it didn’t work, I had no idea why it wasn’t working. Was it a loose connection? Or had I messed up the circuit itself? I went back and forth for a while, trying to fix both at the same time, which honestly just made it more confusing.

To make things worse, I started out using thin copper wire, thinking it would be neat and professional-looking. But those wires didn’t hold contact well at all, every time I moved the board a little, the connection would break. After a few frustrating tries, I switched to jumper wires, which made testing much easier. Around that point, I decided to simplify the problem by building a smaller version first. I wanted to prove the circuit worked before investing time into rebuilding the big pressure pad again.

I realized the key was to finish and test the circuit first basically, to complete the LED and resistor setup with two extra test wires, make sure it lit up when the wires touched, and then integrate those wires into the foil pad. Once I took that approach, the small version worked flawlessly, and then the larger version came together perfectly afterward. 

​​I first used a green LED just to test the circuit, but later I wanted the project to feel more meaningful. I chose red instead not just because it looked like an alarm color, but because it represents the anxiety and tension that come with pressure. It’s a small change, but it gave the whole project a deeper meaning.

Here’s the video demonstration of both the small and large versions of my pressure sensor project.

IMG_0571 IMG_0580