keyestudio
www.keyestudio.cc
57
Sample program
After the connection, let's begin the program compiling. The program is similar to the one of
PWM. For change detail, please refer to the sample program below.
//////////////////////////////////////////////////////////
int potpin=0;// initialize analog pin 0, connected with photovaristor
int ledpin=11;// initialize digital pin 11, output regulating the brightness of LED
int val=0;// initialize variable va
void setup()
{
pinMode(ledpin,OUTPUT);// set digital pin 11 as “output”
Serial.begin(9600);// set baud rate at “9600”
}
void loop()
{
val=analogRead(potpin);// read the analog value of the sensor and assign it to val
Serial.println(val);// display the value of val
analogWrite(ledpin,val);// turn on the LED and set up brightness
(
maximum output value 255
)
delay(10);// wait for 0.01
}
//////////////////////////////////////////////////////////
Result
After downloading the program, you can change the light strength around the photovaristor and
see corresponding brightness change of the LED. Photovaristors has various applications in our
everyday life. You can make other interesting interactive projects base on this one.
*******************************************************************************
Project 13: Flame sensor
Introduction
Flame sensor (Infrared receiving triode) is specially used on robots to find the fire source. This
sensor is of high sensitivity to flame. Below is a photo of it.
Summary of Contents for ARDUINO maker learning kit
Page 1: ...keyestudio www keyestudio cc ARDUINO maker learning kit...
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Page 74: ...keyestudio www keyestudio cc 72 Schematic diagram...
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