Technical Progress: FLORA Board to Arduino Leornado

After few round of testing on Adafruit FLORA board, I still faced problem connecting the circuit and coding the keyboard control.

Therefore, Yee Siang recommend me to explore Arduino Leornado Board, an Arduino board that has built-in keyboard integration. I can connect the circuit like most of the Arduino board, no extra library needed. I agreed with the suggestion too. Since I am considering investing one Arduino board that allow easy flash integration, this is a stable choice.

I ordered one Arduino Leornado online from a local seller and give it a try so that I can meet the deadline of Alpha test on week 8 (after the New Year holiday).

Once I received the board, it took me few days to understand the board by testing out some of the codes shared online.

Example:
Keyboard Message - Arduino Leornado
Keyboard Modifiers - Arduino Leornado

My main challenge is to get Arduino Leornado to pass sensor info to computer and turn them into keyboard input. The two links above helps me to grab the concept, then adapt them into pressure sensor analog data condition.

Along the way of testing, I tested the input with 2 or more pressure points to see how I can allow more variety of user control.

But due to different sensor point has a different "minimum number" and "maximum number" at it's before and after pressure. Some times when I plug the input pin at the wrong place, it will trigger a infinite keyboard press on my computer, and it got my workstation hang for many times.

After few times of such "disaster", I learnt my lesson and carefully label all of the wiring so that no more "computer hang" incident will ever happened again.

Technical Progress: Velostat Pressure Sensor - Multiple Input

The first trial of DIY pressure sensor successfully detect the analog output from the changes of voltage when input weight is added onto the sensor. To create the pressure sensor, the pressure pad is separated into 2 part, the top part connected to the 5 volt pin on the Arduino board and the bottom part connected to the Ground pin. If there's contact between the top part and the bottom part, it'll be a complete circuit. No voltage loss.

For pressure sensor, it means there's voltage changes when force is added upon the sensor. A layer or 2 of velostat is added to avoid direct contact of the top and bottom of the pressure sensor. Once the velostat layer is pressed, it will trigger analog voltage changes. This set of pressure sensor will need to connect with a resistor of atleast 1K ohm.

To work on multiple velostat detection like my reference Joyslipper 2, I need to find example online that has same circuit connection with multiple analog output and resistors connections on the bread board.

At last, I found this circuit diagram that connects three potentiometers together, fits my requirement pretty well.

It took me quite a while to find this. But it's really helpful. I used this circuit to work on my latest slippers connection.

Technical Progress: Explore Arduino Adafruit Flora Board

Making velostat pressure sensor wasn't too difficult. As long as I got the top and bottom layer concept clear, it's quite easy to produce many of them.

Now, the challenge is how to connect the velostat pressure sensor with computer for input control.

I remember my classmate did a hand glove that allow user to generate input through the hashtag gesture. I decided to ask my friend about the Arduino logic and how I can turn the analog data from the pressure sensor into controlling flash-based interaction. 

From there, I was introduced Adafruit FLORA board. 

One good thing about Adafruit is that, they provide very resourceful learning system for their customer to expand the capabilities of their boards. FLORA board adapt Arduino codes, provided that developer has to download Adafruit library in order to demonstrate its features in Arduino environment. Keyboard library is available in Adafruit FLORA board. In this case, I can turn every pressure input into a keyboard control to activate my flash based content. 

Besides that, my main Joyslipper reference in the previous post is also using Adafruit FLORA board. I think this is the best start for the coding experiment. 

Instead of Using Arduino Application to code, I will have to download Adafruit version of Arduino Application.

With Adafruit version of Arduino, there are library specially dedicated for the Neopixel shoes, using velostat pressure sensor to control LED lights.

Digitize Storyboard

Although I haven't fully confirmed the visual idea I am suppose to create, I carry on transfer my storyboard sketches into digital look. During the visual transferring stage, I realized that if I am going to use vector graphic to make the complete video, it's going to be very time consuming. 

Since I haven't come into a clear conclusion of my visual idea, I thought of combining vector and realistic video footages to solve the technical issue of time consuming visual production. The other concern I have is the difficulty of creating the right angle for the vector world. As my project aim to create a visual illusion art work that engage user's attention, the visual has to be believable. Shooting real video footages and turn them into monochromatic mode could allow me to produce believable angle in a shorter time frame. But the challenge for this solution will be, to scout for location to film the video, the equipment required, to get approval for shooting video at the public place and etc.

While having these thoughts in my mind, I still need to test out the visual experience for my storyboard. So below are the first draft of the storyboard. 

Scene 1

Scene 2

Scene 3

Scene 4

From Scene 1 to Scene 4, I manage to make the graphic all in vector format. The challenge will be to get the perspective right. And the next step is to consider how these scenes are going to look like during the animation stage. Some graphic elements need to be able to flexibly adjusted for animation purposes.

Scene 5

Scene 6

Scene 7

From Scene 5 to Scene 7, I faced the challenge to create woods environment from such wide variety of angles. Therefore I decided to choose some of the high res photos from the internet to use as my footage sample.

Scene 8

Since 8 suddenly turn back to a very vector style visual. Personally I wasn't very happy with the result. But due to my struggle of time management issue during this Christmas festive season, I compromised for the sake of meeting my minimum production timeline.