Friday, June 20, 2008

Buy The Strongest Magnet

Juliana Rosales - Nature_data


Uruguayan artist Juliana Rosales has a Oboro space to develop their project nature_data, botanical facility where they examined the behavior of native plants in an urban environment. Through a system of sensors (Arduino + Max / MSP + PureData), the system generates data that provide the tiniest modulation of growth or regression of the plants. This information is retrieved by the artist, which results in chart form, images, sounds, videos, allowing lead to see and hear the movements of nature from a different angle. Juliana
to discover a land where nature exploration with artificial skirt, allowing the same way to stress the fragility of nature and experience its ability to withstand shock.
Here, Rosales draws our attention to the subtleties of behavior other plants typical of the region, such as: the wintergreen ( thé des bois), three sheets Creek ( ariséme ) of Mitella, Dogwood ( cornouiller ) and colonies fern, also experimenting with designs and rhythms that are hidden there.
[translation from French. Marcela Zena]

link: http://www.oboro.net/pdf/press/0708/exhibi_event/comm_rosales_fr.pdf

Friday, March 28, 2008

Difference Between Intermediate And Senior Pads

Arduino PWM Technology

In some previous articles I wrote about PWM modulation. This is used between other things to control the speed of DC motors (DC) and adjust the brightness on the LEDs.
Arduino (Decimilia and derivatives) uses Atmel ATMEGA168 microcontroller, this Microcontroller has 6 PWM outputs (pins 3,5,6,9,10 and 11). AnalogWrite function (pin, value) to control each of the PWM outputs. The frequency of the PWM is fixed 490Hz control and what that function is the activity cycle of the PWM .
A value value = 0v produce a printout 0v, while a value value = 255 produce a constant 5v output. Values \u200b\u200bproduce intermediate values \u200b\u200b media output voltage proportional Vmediosalida = (value/255) * 5V.
For example, to control an LED, a frequency of 100Hz reaches for the human vision system does not perceive the flicker of the same, so the 490Hz using Arduino are more than sufficient.