A little mathematics for “Passenger”

Regarding the perspective view in the spacial environment, there exist some differences between the separated arches.

Here is the demonstration:

(Assuming the standard eye level height is 1.6m, a bit low but bear with me for the example plz)



Here is the calculation:

BC presents the transparent acrylic tube for building up the main frame(which is 1m each), AD presents a iron wire which goes through the tube for shaping the arch.




Here is the real pic working in process: (of course to shape the tube, I have to use the hot air gun to heat it)

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08 2014

3D preview for “Passenger”



Sketching in PS and modelling in 3ds Max to give a preview of “Passenger”

Here is the main frame part:


Here is the whole installation including the camera and connected TV:

spacial SKETCH


08 2014

Spatial Measurement Experiment

After determined the Space 4&5 will be the exhibition place. Certain real site measurement and test is undertaken.


And El wire spatial effect test:



08 2014

Basic interactive prototype test

To collect movement made by audience, PIR motion sensor is made use of as the input.  Transmitting from Arduino, it send out a certain sequences to trigger camera taking photos by IR LED. Collecting real-time images from the audience, long exposure photos will be automatically taken and displayed onto TV.–That’s the main and basic interactive technical part of this project.





PIR motion sensor-Arduino-IR emitter-Camera- TV display:

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Here is a video demonstration. (Thanks to Ping)





08 2014

IR remote controlled camera

Using the PIR sensor as the input as well as the motor module, IR LED and a LED light as output to trigger camera taking photos automatically.

Emitting specific sequences to communicate with the DSLR cameras is a better way to conduct long exposure photography motivated by motion sensor synchronously.

Here is the video demonstrating this part of function.


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Referred this tutorial and made several modification about coding.


This content is published under the Attribution-Noncommercial-Share Alike 3.0 Unported license.



08 2014

Test about EL wire luminous environment

Bathroom test for the EL wire luminous environment (it turned out to be a perfect place to test):

using iron wire to make up a bone structure for EL wire, accidentally making a rose-shape thing as shown below.





Considering the long exposure photography might be part of documenting the project, here is a example of how it was taken when the luminous object moves:



By the way, for the motor part, I am able to control the speed and angle when the motor moves and adapt it into “pendulum” movement.



08 2014

Debugging of external power supply

When I use the servo motor (from the original starter arduino kit) with the PIR sensor, it works well (in both way of  powering from USB and external power supply).

However, when I changed the motor with a stronger one (MG995), it seems something wrong within it: the motor doesn’t spin much and the “L” LED light blinked constantly. So I guess probably the power input doesn’t supply the enough amount to supply this stronger motor. And when I switched the adapter to a higher voltage, the situation remained the same.

I tried to use the multimeter to measure if the adapter could supply a correct power.

And yes, it did.

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Next, I tried to demonstrate if my circuit works well, so i connect the power into pins directly (using 5v external power supply machine).

And yes, the motor did a good job with PIR sensor!

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In this case, I suspected the problem might be in the input port.

And probably right. No matter how much i tried to input(with 5-20V) through the port(circled in green), the real voltage runs through the circuit is only 4.3V. That’s why my motor couldn’t spin much.

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Is it because the board have to protect itself within 5V to operate?  But 4.3V is way too low, even lower than powered by USB. And in that case, how could it support to operate a stronger motor(normally 6V)?

FYI, here is a short video shown how it works in my expectation by powering directly in pins!






08 2014