Friday, February 27, 2015

Arduino 2.27.15

Arduino Progress

First Try (Simple Exploration)

The easiest way I've managed to measure a resistive sensor is to connect one end to power and the other to a pull-down resistor to ground. Then the point between the fixed pulldown resistor and the variable photocell resistor is connected to the analog input of the microcontroller.

Vo = Vcc ( R / (R + Photocell) )
This basically works by making the voltage proportional to the inverse of the photocell resistance which is, in turn, inversely proportional to light levels. The resistance of the photocell decreases, the total resistance of the photocell and the pulldown resistor decreases from over 600KΩ to 10KΩ. That means that the current flowing through both resistors increases which in turn causes the voltage across the fixed 10KΩ resistor to increase. This is the simplest method I have tried to date.

The code v1.5

Light Intensity Photosensitive Sensor Resistor Module

http://www.ebay.com/itm/like/321516078989?lpid=82&chn=ps

This may be the next step to take. Here is a diagram of the breadboard layout that implements a third party photosensitive sensor module.

-S

Friday, February 6, 2015

2015.04.05 work flow

Thursday, February 5, 2015

FIREFLY _Project 1

“Firefly” dramatically reveals how wind moves around and through it. The hinged, polycarbonate panels swing with the unseen patterns of the wind. Each panel has a small embedded magnet that connects with an electrical reed switch. By day, the work appears like rippling waves of glass. By night, the back and forth swinging of the panels trigger the flickering of tiny led lights. The illumination of this entire sculpture requires less energy than a 75-watt light bulb. The artwork also serves as a gantry for a series of power-generating, vertical axis wind turbines that power the lights as well as feeding electricity back into the building. A collaboration with KMD Architecture and commissioned by the San Francisco Arts Commission for the Public Utilities Commission. Completed in 2012.

Video Link:

http://nedkahn.com/portfolio/firefly-video/

CJ R&D Center kinetic facade _PROJECT 2

Testing the next evolution in commercial building skins the CJ Cheiljedang Research and Development Center’s unique responsive facade controls solar gain over a significant range of exposure. Yazdani Studio of Cannon Design was tasked to create a marquee office and research center in Seoul, South Korea. Their solution was to create three tear drop shaped towers radiating from a glass atrium shrouded in a kinetic shade.

The accordion folded window shading wraps all three towers to provide a level of protection from solar glare. In key areas the shading folds to maximize solar control using a custom designed retractable mechanism. Based on the simple umbrella and developed on the 3ds Max software platform the perforated steel strips installed on scissor actuators can open or close automatically to ensure proper natural light levels while reducing overheating. Each unit is set between floors in groups of three ribbons, allowing the windows to be fully covered or fully exposed. When open the façade provides shade protection from the overhead summer daytime sun.

Video Link:

http://vimeo.com/19900510

Similar Project to above....

kiefer technic showroom _PROJECT 3

Ernst Giselbrecht + Partner

Ernst Giselbrecht + Partner present the Kiefer Technic Showroom, an office building and exhibition space with a dynamic facade that changes to outdoor conditions, optimizing internal climate, while allowing users to personalize their own spaces with user controls.

The shell construction of the facade consists of solid brick walls, reinforced concrete ceilings and floors, and steel encased concrete columns. The facade consist of aluminums posts and transoms with protruding bridges for maintenance, with an EIFS-facade in white plaster. The sun screen operates on electronic shutters of perforated aluminum panels.

Video Link:

https://www.youtube.com/watch?v=rAn4ldWjw2w

Facade Mechanics Information

Facade Mechanics

Real World Examples

Examples of Operable facade mechanics and details.

In order from top to bottom, Step motor attached to cable, Linear Actuator Arms, Hydroponic pump on pivot arm, Step motor with cable cord, common motor used in operable louver facades.

Notable System

Shown is a previous M.Arch project using operable panel project using the same technique as the Kiefer technic showroom (https://www.youtube.com/watch?v=rAn4ldWjw2w). Kiefer uses a motor and cord system attached to wheels within the inset groove of the vertical bracing. Cords attached to the motor reel up the wheels attached to the corners of the facade much like a fishing rod.

Physical Model Mechanics

Ardiuno board can be used to do simple tasks as to turn off and on LED light or as complicates to control whole house HVAC, indoor/outdoor temps, and ceiling fan speeds. Current projects documents on the Ardiuno website range from wifi controlled RC cars to iphone operated missile lauch buttons. Implementation of Ardiuno boards in architectural physical models is becoming more popular as the demand for operable pieces rise. Ardiuno is a very feasible route for physicals models to meet the expectations of portraying an operable facade.

Arduino Explanation and Uses

https://www.youtube.com/watch?v=UoBUXOOdLXY

Types of Ardiuno Boards

http://arduino.cc/en/Main/Products

Relevant Arduino Board Product Information

http://arduino.cc/en/Main/ArduinoBoardUno

http://www.atmel.com/Images/doc8161.pdf

Tutorials

http://arduino.cc/en/Tutorial/HomePage

Cad Download

arduino.cc/documents/Arduino%20Uno.dxf

Arduino Resources