Author Archive

Assignment 6: Swinging Baby

Posted in 6 Form & Motion on October 12, 2009 by zhixunhe

My idea comes from an advertisement of McDonald. The scene in the ad is that a baby on the swing smiles when he sees the sign of McDonald out of the window and cries when the sign disappear from his view. I apply a similar idea in my design.

I’ve made a simple swing using the steel wire from the meal box of Little Asia. A servo motor is provided to make the swing work. A little paper baby is placed on the swing. His eyes will blink when the swing is near the candy, which means he is happy.


Assignment 5: Treasure Hunt

Posted in 5. Treasure Hunt on October 6, 2009 by zhixunhe

1) Flex Sensor 4.5’’ $12.95

2) Flexible Stretch Sensors $8.95

3) Electroluminescent Wire $11.99
CrazyPC Blue EL Neon Wire Kit

4) Alcohol Gas Sensor MQ-3 $4.50

5) Solenoid  $1.5


6)  Linear actuator $9.95

Miga NanoMuscle

7) Fiber optic cable        $0.68

Single Mode Simplex Cable

8) Tiny Potentiometer    $0.98

1K Ohm Mini Trim Potentiometer

9) Conductive fabric      $17.06
3M 9712 XYZ-Axis Electrically Conductive Tape

10) Thermochromic Paint      $22.99

Thermochromic Temperature Color changing paint

11) Nitinol Actuator Wire $10.35

12)Conductive Paint $7.50

13) Neodymium Magnet $8.72

14) Cooper Foil $1.09

15) Tilt Sensor $14.95

16) Peltier Junction $15.95

The most interesting device I found is the sensitive fingertips. It can be used by children and their piano teachers to visualize the difference between “p” piano(soft) and “f” forte(hard). People can see the strength of their fingertips on the screen when playing piano with the gloves.

Assignment 4

Posted in 4. Analog Input-Output on September 28, 2009 by zhixunhe

For part 1, I programmed two leds to increase their brightness from off to the brightest and gradually decease to off. For part 2 and part 3,  I just made the standard circuits.

For part 4, I used a photoresistor as the sensor and keep track of the lowest value and highest value it receives.  The video I uploaded blurred and did not show clear display. So I wrote down the experiment results: the lowest value was 14 and the highest value was 45.

Part 1 “Pulse”:

Arduino Sketch: Pulse

Part 2 “Color Mixer” :

Arduino Sketch: ColorMixer

Part 3 “Pulsing Color Mixer”:

Arduino Sketch: Pulsing Color Mixer

Part 4 “Finding Sensor Limits”:

Arduino Sketch: Finding Sensor Limits

Assignment 3

Posted in 3. Digital Input-Output on September 24, 2009 by zhixunhe

Part 2: Blink

Arduino Sketch: Zhixun_Assignment3_Part2

Part 3: Binary

Arduino Sketch: Zhixun_Assignment3_Part3

Part 4: Marsh-up

Arduino Sketch: Zhixun_Assignment3_Part4

Assignment 2: Digital Clock with Dial and Switch

Posted in 2. Buttonless Clock on September 8, 2009 by zhixunhe

My proposal for the buttonless clock is a simple clock with a switch and a dial. The switch is on the back of the clock box and the dial is on the top. The switch has two directions. By changing the direction of the switch, the user can switch between display mode and setting mode. Once clock has been changed to setting mode, the dial will open and the user can use his finger to add minutes and hours for the clock.
For example, if the user rotates the dial clockwisely, time on the digital clock will increase. If the user rotates it anticlockwisely, time will decrease. After the user finishes the time setting, he could switch the clock back to display mode.

My idea for the design comes from a famous analog clock called 555. Our family used to use it for more than 10 years. When the clock stops, you use your finger to dial it to give it mechanical power so that it could start running. The feeling was that you are the controler of your time because you are physically connected to the clock. For this digital clock, as your finger is playing with the dial, you can see the time keeps changing as if you were the master of time.