Danny Rozin Fall 2020

Welcome to my class! This is our class home where I’ll be updating resources and notes from our class meetings. This is also where your class blogs will live so we can see each other’s class work.

Class Times

Wednesdays, 9:00 AM – 11:30 AM NYC time (GMT-4, until Nov. 1, then GMT-5),
Thursdays, 8:30 AM – 11:00 AM NYC time (GMT-4, until Nov. 1, then GMT-5)

Contacting Me

Book office hours with me on my calendar. I will schedule regular office hour appointment slots which you can book automatically once the semester starts. You’ll need to sign in with your NYU login to see it.

Feel free to email me at danny.rozin@nyu.edu if you have any questions or things you want to talk about.

How Class Will Be Run

The most valuable thing we can do when we are in person or online in a class meeting together is to discuss and practice the subject that you’re learning. Any “lecture material” is on this site in video or written form, and assigned for the weeks where we will discuss it. I will expect that you’ve done the readings or watched the videos and tried the lab exercises assigned in advance of each class, and are coming to the class meetings with questions. Class meetings will be mainly discussions and shared demonstrations or experiments, not lectures. Use class time to get me or your classmates to clarify things you didn’t understand from the assigned material.

It’s okay if you couldn’t get a lab exercise or a project to work. When that happens, try to debug it, explain what you did in your blog, and come to class prepared to talk about the details and ask specific questions. Pay attention to your classmates’ work and their questions; quite often, they’ll be asking the same thing as you.

When class meetings are conducted online, I might record the Zoom meetings, if it is useful to the class and if all students consent. We will pause the recording when the discussion needs more privacy, and I will share the recording links only with our class, and set them to expire after the semester. If a question comes up in class or in online office hour meetings that is broadly useful, I may ask you if we can record the answer for others. Your comfort and consent are important, however, so please let me know if you have concerns.

Class Tools

Since this class will be meeting remotely via Zoom this semester, there are a few other tools I’ll be using that you might want to get familiar with:

NYU Google App suite – you’ll need to know these for most of NYU interaction. You have access to the whole suite through your NYU account. Search for NYU Drive. We’ll use mail, calendar, docs, sheets, drive, and slides.

Zoom – Check out Zoom tutorials and resources by NYU.

Class Blogs

Wednesday class:

Thursday class:

Feedback page for Wednesday final projects

Feedback page for Thursday final projects

Class 13 workshop

We will meet in groups of 4 during class time to share our progress and get help and feedback. You only need to show up for your allotted time and can use the rest of the class time to work on your project :

Wednesday class:

9:00-9:40 Winslow, Alan, Hu, Bei, Branco, Gabriele (Gabi), Bae, Keunjung (Kate)
9:40-10:20  Fajardo, Natalie, Parisi, Nicholas (Nick),  Okuda Ceraulo (Pauline), Cadoux, Philip
10:20-11:00 Melman, Rebecca, Heckle, Samantha (Sam), Zhu, Sihong (Sean), Chen, Stephanie
11:00 – 11:40  Hou, Tiange,  Hu, Xinrong (Shannon), Kampf, Zachary (Zack),  Meng, Zi Xun

Thursday class:

8:30-9:10  Xu, Binyan (Michelle) , Choi, Chloe, Steinbrecher, Dalit, Baik, Eunseo (Victoria)
9:10- 9:50 Yang, Hyunwoong (Hyun), Yu, Junoh, Wozniak, Lucas,  Saraf, Rajshree
9:50-10:30  Seri Levi, Shira,  Lee, Sumi, Hyder, Syed Wasifuddin (Wasif), Kong, Xiaowei (Vivien)
10:30- 11:10  Wang, Yiran (Rachel),  Zhou, Zhiyu (Michael), Chen, Zikang (Jack),  Primo Liraz (Lilo)

Project 3

Feedback page for Wednesday projects

Feedback page for Thursday projects

Week 11 – Loads

AC Loads:

Any AC load can be controlled with Arduino using a relay, including motors, fans, lights, computers,

power switch tail https://www.adafruit.com/products/268 safest and most convenient

Relay https://www.sparkfun.com/products/10924 you need to wire your high voltage through it so be super careful (Relay Tutorial)

AC motors

Attributes: Cheap, strong, medium speed, hard to control speed, hard to reverse.


Geared AC motors

Attributes: cheap, slow, very strong, hard to control speed, hard to reverse.


DC Motors

Attributes: Cheap , strong, very fast , you can control speed but not angle, reversible


DC fans, DC blowers

DC pumps

Geared DC motors

Attributes:  Very strong, slow , you can control speed but not angle, reversible https://www.servocity.com/html/micro_gearmotorblocks.html

DC motors with encoder

Attributes: Like DC motors but give you to feedback via optical encoder


DC motors from Cars

Car retractable antena motor

Car wipers motor

Car windows motor

Car door lock actuator

Stepper motor

Attributes: medium speed, control speed, position, reversible


Geared stepper motor

Attributes: slow, strong, control speed, position, reversible


Automotive gauge stepper motor (cluster)

Attributes: very light, weak, cheap , Can work directly from Arduino with no transistors or anything.

on amazon

video of inside


Attributes: slow, strong, control speed, position, reversible, 180 degrees , super easy to control


More servos – https://www.servocity.com/html/servos___accessories.html

Continuous rotation 360 degree servo

Attributes: slow, strong, control speed, reversible, super easy to control


Linear actuators

Attributes: Linear, limited stroke, expensive, control like DC motor, some have potentiometer feedback

Stepper motor linear actuator


Attributes: Super fast, super short stroke, momentary


Solenoid valves

Solenoid locks

Mechanical linkages:

Hubs – https://www.servocity.com/html/hubs__couplers___adaptors.html

couplers – https://www.servocity.com/html/set_screw_shaft_couplers.html#.VkJ3Tq6rSEI

gears – https://www.servocity.com/html/pinion_gears.html

chains / sprockets – https://www.servocity.com/html/sprockets___chain.html

Belts / pulleys  –timing belts, O Ring pulleys, cable pulleys

Power supplies:


computer power supplies, how to use computer power supplies

How to tell the capabilities of computer power supply


Wire gauge chart per amp 

Wire gauge chart diameter

multiconductor wire

Project 2

Feedback page for Wednesday projects

Feedback page for Thursday projects

Week 9 – more communications

Some more Asynchronous serial:

Asynchronous = UART

Multiple UART Arduinos

Adding Software Serial to Arduino

For long distance or many nodes – RS485

MIDI, Control sound and synthesizers from Arduino:

DMX, Control lighting and other theatrical and home automation:


Synchronous serial:

compare synchronous and asynchronous

Compare I2C and SPI


SPI schematic


SPI Potentiometer lab



I2C infrared temperature sensor lab

Shifting :


Row – Column schematic

Another Multiplexer (not serial, analog)


Class 7

diagram showing the path of a serial byte from Arduino to P5

Shawn’s p5.serialcontrol app


P5 and Arduino sketches for sending 1 byte binary from Arduino to P5

P5 and Arduino sketches for sending 1 value in ascii from Arduino to P5


P5 and Arduino sketches for sending 1 byte binary from P5 to Arduino

P5 and Arduino sketches for sending 1 value in ascii from P5 to Arduino


P5 and Arduino sketches for sending multiple values in ascii from  Arduino to P5

P5 and Arduino sketches for sending multiple values in ascii from P5 to Arduino
P5 and Arduino sketches for sending multiple values in ascii from P5 to Arduino with parseInt()


P5 and Arduino sketches for sending 3 values in ascii from Arduino to P5 with handshake

P5 and Arduino sketches for sending 3 values in ascii from Arduino to P5 with handshake with serial port selector menu

Project 1

Feedback page for Wednesday projects

Feedback page for Thursday projects

Class 3

Second class

Physical interaction discussion in groups, after reading the Bret and Victor pieces:

  • Is there a conflict between invisible interaction and a physical interaction ?(Physical objects are seldom invisible…).

  • Physical interaction designers try to make sure people with physical disabilities are included. Are there other differences between people that may cause them to be excluded or disadvantaged from a particular design?

  • Is it important for an interface to tell the story of the technology that enables it ? or maybe just enabling it’s functionality os enough?

water metaphor sometimes helps explain the three components of electricity
water metaphor sometimes helps explain the three components of electricity

Hight of water reservoir = Potential = volts = v
Narrowness of pipe = Resistance = ohms = R
The resulting flow of water= Current = Amps = I

Fritzing github (free?), or buy
Arduino Nano 33 IOT page and download Fritzing part

How to Use a Breadboard and Build a LED Circuit
Breadboard connections
Arduino Nano 33 IoT board with USB connector facing the top
Arduino Nano 33 IOT pinout

Homework pairs-
Could be fun and helpful to do the labs with someone, also if you haven’t done a “creative switch” you can do one together. I Don’t want to post your emails here so I will email them to you so you can find each other and coordinate. If this is too hard to coordinate because of time differences and such then feel free to work individually:


• Winslow, Alan and Hu, Bei
• Branco, Gabriele and Bae, Keunjung
• Fajardo, Natalie and  Parisi, Nicholas
• Okuda Ceraulo and  Cadoux, Philip
• Melman, Rebecca and Heckle, Samantha
• Zhu, Sihong and Chen, Stephanie
• Hou, Tiange and Hu, Xinrong
• Kampf, Zachary and Meng, Zi Xun


  • Xu, Binyan and Choi, Chloe
  • Steinbrecher, Dalit and Baik, Eunseo
  • Yang, Hyunwoong and Yu, Junoh
  • Wozniak, Lucas and Saraf, Rajshree
  • Seri Levi, Shira and Lee, Sumi
  • Hyder, Syed Wasifuddin and Kong
  • Wang, Yiran (Rachel) and Zhou, Zhiyu
  • Chen, Zikang and Primo Liraz

First class

slides about interaction

my work

Fantasy Device – As a class, we’ll make a list of fantasy devices; things that don’t exist, but that we wish did. For today, we’ll ignore technical feasibility and concentrate on how you’d operate these devices if they did exist. You’ll be divided into groups of 3. Pick a fantasy device from the list. Design a control interface for this device and demonstrate it in­ class.

It is sometimes useful to think in terms of WH questions and try to answer them in your design:


Lets take an example, A popular fantasy device in movies and books is a time machine. In movies and TV, the production has to imagine what these devices look like and how they are controlled:

“Back to the future” movie:

Time Machine control panel
Time Machine control panel
Time Machine in "Back to the future" movie
Time Machine in “Back to the future” movie

So thinking about the WH questions:

WHAT is it ? – A car.
WHO gets to go ? – anyone in the car.
WHERE does it take you ? Set in the control panel.
WHEN does it activate ? When the car reaches 80 MPS.

Stewey from “Family Guy” time machine:

Stewey's time machine
Stewey’s time machine
Stewey's time machine cabinet
Stewey’s time machine cabinet
Stewey's time machine control panel
Stewey’s time machine control panel

Here the designers decided the machine is a cabinet, but they also added a disc that goes with Stewey and is used to get back:

WHAT? – A cabinet and a disc
WHO gets to go? Anyone in the cabinet or on the disc.
WHEN does it activate ? Not sure, but there is a big red button…
WHERE does it take you? There is a control panel, note that the control seems to be relative, so you can go forwards and backwards, not absolute like in “Back to the future”

“Spongebob Squarepants” time machine:

video of Spongebob Squarepants episode

Here the machine is the freezer from the Crusty Crab, note that the whole freezer travels through time and it is ripped from it’s surroundings

WHAT is it ? A freezer.
WHO gets to go ? Whoever is in the freezer.
WHERE does it go? Hard to say, looks like two levers and no display.
WHEN does it activate? Hard to say, but it has some buttons.

Wednesday Google slides for us to create our designs

Thursday Google slides for us to create our designs