About the use of a photocell

Following good information on the use of photocells with arduino:

Analog Voltage Reading Method

The easiest way 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 a microcontroller such as an Arduino (shown) [keep reading]

Notebook fan on arduino

Just to remember: Connecting notebook fan to arduino (RPM counting)
http://playground.arduino.cc/Main/ReadingRPM

They are coming soon!

:D

Data Storage: Data Logging

Hi guys, one of the very advantages of arduino prototyping board for wildlife research is the possibilities to measure and store data. Here follow a tutorial on data logging using SD card shield with arduino, lets see it!

!BioHacking

In the basement of a suburban two-story house on a quiet road just outside Pittsburgh, six mostly self-taught scientists tinker with an assortment of computer parts and electric equipment. They plan one day on becoming cyborgs [keep reading]

Arduino Video Tutorial 01: Get to know your Tools with Arduino CEO Massi...

LDR (ligh sensor) and blink with arduino and minibloq

Follow the code; (Segue o código):

#include "stdlib.h"
#include "IRremote.h"
#include "pitches.h"
#include "Minibloq.h"

void setup()
{
      initBoard();
      float s0 = 0;
      while(true)
      {
                s0 = AnalogRead(sensor0);
               DigitalWrite(D13_LED, true);
               delay((s0*5));
               DigitalWrite(D8, false);
               delay(((1/s0)*500));
               DigitalWrite(D8, true);
               delay(((1/s0)*500));
               DigitalWrite(D13_LED, false);
               delay((s0*5));
      }
}
void loop()
{
}