ㅡ Intro to Physical Computing

• Sep. 03. 2024

• Lab: Components

• Lab: Electronics and using a Multimeter

• Sep. 10. 2024

• Sep. 17. 2024

• Lab: Tone Output Using An Arduino

---Play Tones

---Play music (pitches.h)

---Making a musical instrument 

• Sep. 17. 2024

• Oct. 01. 2024

• How many Amp we need for servo motors
• How to decide whether to divide each sensor value by 3 parts with heart rates(Low/Mid/High)

/*
 Heart beat plotting!
 By: Nathan Seidle @ SparkFun Electronics
 Date: October 20th, 2016
 https://github.com/sparkfun/MAX30105_Breakout Shows the user's heart beat on Arduino's serial plotter Instructions:
 1) Load code onto Redboard
 2) Attach sensor to your finger with a rubber band (see below)
 3) Open Tools->'Serial Plotter'
 4) Make sure the drop down is set to 115200 baud
 5) Checkout the blips!
 6) Feel the pulse on your neck and watch it mimic the blips It is best to attach the sensor to your finger 
using a rubber band or other tightening
 device. Humans are generally bad at applying constant pressure to a thing. When you
 press your finger against the sensor it varies enough to cause the blood in your
 finger to flow differently which causes the sensor readings to go wonky. Hardware Connections (Breakoutboard to Arduino):
 -5V = 5V (3.3V is allowed)
 -GND = GND
 -SDA = A4 (or SDA)
 -SCL = A5 (or SCL)
 -INT = Not connected The MAX30105 Breakout can handle 5V or 3.3V I2C logic. We recommend powering the board with 5V
 but it will also run at 3.3V.
*/#include <Wire.h>
#include "MAX30105.h"MAX30105 particleSensor;void setup()
{
 Serial.begin(115200);
 Serial.println("Initializing..."); // Initialize sensor
 if (!particleSensor.begin(Wire, I2C_SPEED_FAST)) //Use default I2C port, 400kHz speed
 {
 Serial.println("MAX30105 was not found. Please check wiring/power. ");
 while (1);
 } //Setup to sense a nice looking saw tooth on the plotter
 byte ledBrightness = 0x1F; //Options: 0=Off to 255=50mA
 byte sampleAverage = 8; //Options: 1, 2, 4, 8, 16, 32
 byte ledMode = 3; //Options: 1 = Red only, 2 = Red + IR, 3 = Red + IR + Green
 int sampleRate = 100; //Options: 50, 100, 200, 400, 800, 1000, 1600, 3200
 int pulseWidth = 411; //Options: 69, 118, 215, 411
 int adcRange = 4096; //Options: 2048, 4096, 8192, 16384 particleSensor.setup(ledBrightness, sampleAverage, 
ledMode, sampleRate, pulseWidth, adcRange); //Configure sensor with these settings //Arduino plotter auto-scales annoyingly. 
To get around this, pre-populate
 //the plotter with 500 of an average reading from the sensor //Take an average of IR readings at power up
 const byte avgAmount = 64;
 long baseValue = 0;
 for (byte x = 0 ; x < avgAmount ; x++)
 {
 baseValue += particleSensor.getIR(); //Read the IR value
 }
 baseValue /= avgAmount; //Pre-populate the plotter so that the Y scale is close to IR values
 for (int x = 0 ; x < 500 ; x++)
 Serial.println(baseValue);
}void loop()
{
 Serial.println(particleSensor.getIR()); //Send raw data to plotter
}

• Oct. 15-22. 2024

Theme Selection (Unexpected Fear)

Material Selection (Heart Rate Sensor, Servo Motors)

Stage Sketch (Servo Motor Angles, Candy Baskets, Input)

• Hiding places for servo motors and breadboards
• Positioning for the subject's hands
• Sensor location
• Candy dispensing area

1. Set Design Sketch and Modeling

• Before building the set, we started with simple hand sketches and 3D modeling to establish the scale of the set. 
• Our goal was to rescale the large space of a subway station into a more manageable set size while finding the most effective layout that could contain all necessary components. 
• By using a 1:1 scale model, we aimed to minimize potential sizing errors during the actual set construction.

• Referring to the model, we used foam board to construct the main structure of the set. 
• After creating the images needed for each surface, we printed them and attached them to the foam board. 
• To capture the essence of a subway station, we used actual images of subway elements. 
• By layering features like pillars and ceiling protrusions, we aimed to give the set a sense of depth and space.

• To visually link the output of each sensor to the subway environment, we used a 3D printer to create objects commonly found in subway stations, such as benches, trash bins, and ticket vending machines.

• We needed a sensor house large enough for people to put their hands in. 
• We cut string with a straw-like texture and attached it to the outer surface of a wireframe house. 
• Inside the house, we added slippery-textured toys to create a sense of discomfort when people reached inside.

• After creating the circuit, we attached it underneath the set. 
• The heartbeat sensor was placed on top of the set, and the servo motors were installed below. 
• After installation, we tested whether the servo motors worked properly in response to the sensor input.

• We attached the 3D-printed subway elements to the motors. 
• Below the motors, we built and installed a candy dispenser in the form of a box. 
• When the servo motor rotated 90 degrees, it revealed an opening where people could take candy from the dispenser.

• We attached the heartbeat sensor to the top of the set. 
• Since people might have difficulty finding the exact sensor location when placing their hands inside the sensor house, we thought it would be helpful to make a guide. 
• Using clay, we molded a guide to help people place their fingers in the correct position.

• Finally, we installed all the fabricated elements onto the subway set. 
• To enhance the atmosphere, we added details like ghosts and talismans to the background. 
• We also made the ghost’s eyes move manually to add a more creepy effect.

1. Heart rate sensor(MAX30105) testing
2. Decoupling 3 Servo motor
3. Combine 3 servo motors as an output and a sensor as an input
4. Scaling the sensor range and adding State variables and functions for interaction
1. State variables: Stabilization period, Per-person quotas
5. User testing and adjusting input range of Low, Mid and High.

• Use the average value of the heart rate in the first 2 seconds after sensing the person's heart rate.
• Each person can have only one candy

• Each servo motor: 220µF (decoupling x3)
• Entire power supply line: around 1000~1200(470µF x3)

• Communication between devices requires a method and agreed-upon language
  
• Serial communication is one of the most common forms of communication between computers

• Data transmission and reception rate
  
• Voltage levels representing 1 and 0
  
• Meaning of voltage levels (whether high voltage represents 1 or 0)

• Common ground connection
  
• Transmit line (for sending data)
  
• Receive line (for receiving data)

• Example: At 9600 baud rate, 1200 bytes can be transmitted per second
  
• Data is transmitted by changing voltage levels bit by bit
  
• Generally transmitted from Most Significant Bit (MSB) first

• UART: Universal Asynchronous Receiver-Transmitter handles serial communication
  
• USB: Primary communication method in modern computers
  
• CDC: Communications Device Class that supports serial communication over USB

• Processors have serial buffers to store received data
  
• Only one program can control a serial port at a time
  
• Data is processed in FIFO (First-In, First-Out) order

• Both devices must use the same communication protocol
  
• Agreement needed on the meaning and order of transmitted bytes

• Oct. 29. 2024

Lab: Two-Way (Duplex) Serial Communication Using An Arduino and the p5.webserial Library

Sending Multiple Serial Data using Punctuation

• Nov. 12. 2024

• Dec. 9. 2024

<Interaction between People and Computers and the Space In-Between>

• Interaction

1. Sensory Overload

• Confronted with a noisy, overwhelming setting
• Faced with two technological entities with unclear requirements
• Experiencing immediate confusion and sensory stress

1. Interaction Dynamics

• Presented with visual guidance instructions for each device
• Tasked with attempting to soothe the "baby MacBook"
• Forced to navigate complex interaction protocols

Psychological Experience

• Confusion: Participants will feel profound bewilderment
• Uncertainty: Lack of clear understanding about each entity's specific conditions
• Problem-Solving Motivation: Driven to find a resolution to their perplexing situation

Key Objectives

1. Prevent the baby MacBook from crying
2. Keep the baby within the mother's line of sight
3. Ensure the mother MacBook feels secure and relaxed
4. Maintain a delicate balance of care and observation

 Visual Language

•   1. class                           

•                                           Sep. 05. 2024

• Assignments : Choose a design you like and analyze its system, hierarchy, typography, color system and use of negative space.

 Intro to Comp Media

• Worksheet assignment

function setup() {                  
createCanvas(400,400);
}function draw() {
background(400);
}

 // Code that describes the starting position of a shape that will move
let x = 50;
let y = 50;function setup() {
createCanvas(400, 400);
}
function draw() {
background(220);
 // Code that changes the position of the shape over time
x++;
 y++; // Prevent the rectangle from moving off the canvas
 if (x > width) {
 x = -50; // go back to left when it gets out of screen }
 if (y > height) {
 y = -50; // go up when it gets out of screen }
 }// Code to draw the shape
rect(x, y, 50, 50); // Code that describes mouse interaction
 if (mouseX > x && mouseX < x + 50 && mouseY > y && mouseY < y + 50) {
 x = mouseX - 25;
}
}

// Canvas drawing
function setup() {
createCanvas(800, 600);
 }// background
function draw() {
background(3,255,255); // blue background
 
 // red line
 stroke(255,0,0); // red color
 strokeWeight(45); // line weignt
 line(0,0, 800, 600); // line position
 
 
 //draw the ellipse with no stroke
 noStroke()
fill(0,200,2) //ellipse color
ellipse(400,300,380,290)
 
 //draw the square with no stroke
 noStroke()
 fill(0,0,128) //square color
 square(540,240,50)
}

• Drawing my portraitdrawing mechanism

• Worksheet assignment

• Create an animated sketch!

• W4 assignment

• worksheet

1. Create 10 columns that toggle on and off when you click on them. You click on the column and the column turns red and stays red. You click on the column again and it turns white and stays white. Challenge: Make this work for a grid of cells.

• Assignment

• Team Jenn Sky Plan

 Hypercinema

•                                           Sep. 23. 2024

Final GIF!

• 
  
• 
  
•         Feel free to reach out anytime.

email: wc2771@nyu.edu
• phone: 646-295-7695
• site: wonjchoi.cargo.site