Author Archives: liux335

Week 8 – Stepper – Xiaoyu

Part 1

DC Motor:
Two wire (power & ground), continuous rotation motors
Using pulse width modulation (PWM) to control the speed of DC

Stepper Motor:
Use multiple electromagnets around gear to divide a full rotation into equal steps.
Requires extra controller.

Servo Motor: Generally assembled by a DC motor, a gearing set, a control circuit and a position-sensor (so position can be controller precisely).
Usually three wires (power, ground, signal)
Using pulse width modulation (PWM) to control the signals of servomotors.


Part 2

Use knob to control the speed of a stepper motor.

Core components
1* potentiometer
1* step motor
Wires & jumpwires
Arduino board

How it works
Use knob to control the speed of a stepper motor.

Can’t see the movement of stepper, though I can feel it changes.



Week 11 – Xiaoyu & Weilin

We have tested several materials and components.


Input: Velostat (Pressure sensor) + conductive tape

Output: audios represented different moods

Chairs also have work hours. They are happy to assist you during work hours but they can also get crappy sometimes. They also preserve the right to refuse anyone when they are on a break.


Project Planning

Group member: Weilin, Xiaoyu

Autonomous Objects: We are making a series of experimental prototypes that explore the ubiquitous but novel relationship between humans and objects. By reimagining the messages behind everyday objects, the project enables everyday objects to communicate and negotiate with us in their (possibly) preferable way.

Possible examples:

1. Printer: A printer who needs a break occasionally.
2. Hand Dryer: A hand dryer who messes with you.
3. Clock: A clock from China who only wants to live in the Beijing Time.

Interaction/systems diagram

(will be different depending on different objects)
Possible interactions seen from the link:

Timeline with milestones

Week 11: Idea development, research
Week 12: First prototype
Week 13: Play test
Week 14: Second prototype
Week 15: Refine
Week 16: Documentation, presentation

Materials list

Antique electrical devices

(will be different depending on different objects)

Precedents or references

When Objects Dream, ECAL


Objects Thinking Too Much @ICC

Objective Realities

On the Secret Life of Things

week 7 – xiaoyu

I want to control the light in different rooms.
Use IR sensor to control the brightness of LED, and turn on/off of LED

Core components

1* IR sensor
1* remote control
2* LED
2 * 220 ohms resistors
Wires & jumpwires
Arduino board


How it works

Button 1 : switch on/off of blue LED
Button 2 : switch on/off of yellow LED
Button + : increase brightness (++ 50)
Button – : decrease brightness (- – 50)
Two LEDs have different on/off state, but have the same brightness.


Two LEDs can’t be adjusted separately
The remote control is inaccurate


pcom/IR sensor

week 5 sensors Xiaoyu

Goal of project/interaction

Create a circuit that the LED will light up only when the ultrasonic sensor detect something close and photocell sensor is covered.

Core components

1 * ultrasonic sensor
1 * photocell sensor
1 * LED
1 * 10k ohms resistors
1 * 220 ohms resistors
Wires & jumpwires
Arduino board

How it works

Get close to the ultrasonic sensor
Cover the photocell
LED light up






Combination Lock – Xiaoyu

Goal of project/interaction

Utilize 4 small buttons to create a combination locker
Use 1 big button to submit & reset
Green and red led to show whether the passcode is right or not
Yellow led to show each correct press

The lock passcode: 4213

Core components

4 * small buttons
1 * big button
3 * LED (red, yellow, green)
5 * 10k ohms resistors
3 * 220 ohms resistors
Wires & jumpwires
Arduino board

How it works

Press the button sequentially once a time with no repeat
If it is in right sequence, yellow led will blink
Press the yellow big button to submit (and it will reset at the same time)
Green led means unlocked (right), red led means locked (wrong)


If you don’t start with 4, and then you pressed 4, then press the buttons in a right sequence, the locker can still be unlocked.





Transistors – week 3

Group Member: Alya, Liliana, Min, Xiaoyu, Ron

We choose transistors as our topic because transistors are fundamental in every modern circuit and can be used as either switches or amplifiers. But the principles and operations of transistors are too complicated to understand for people without engineering background. We have learned what is behind a transistor and how different transistors function. We found the metaphor that transistor can be described as the “valve.” What we are trying to do through the zine is to deliver the concept and functions in a more comprehensible way. We hope the layout is readable for screens and printed version.


tele-present water, 2011 by David Bowen – Xiaoyu Liu

Gunnar Knechtel Photography

Most of David Bowen’s projects focus on the recurrence of natural elements. Tele-present water is gathering real-time data from a remote unknown location somewhere in Pacific Ocean and transmitting valid data (intensity and frequency of the water wave) to this installation. As described on the website “This work physically replicates a remote experience and makes observation of the activity of an isolated object, otherwise lost at sea, possible through direct communication.”

My interest has been aroused while taking a different perspective. I found it sarcastic of the form choice. He is using the mechanical grid structure to represent a natural phenomenon and deliver loneliness and helplessness to its audience. Why a obviously unnatural structure rather than a replicant of natural water waves? Why in a museum with all the unnatural surrounddings? Is it a parody to the mechanized world?