Difference between revisions of "8 Lets measure the light in the room with LDR"
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[[File:Arduino Interface LDR.JPG|680px]] | [[File:Arduino Interface LDR.JPG|680px]] | ||
+ | ====Code==== | ||
+ | <syntaxhighlight> | ||
+ | /* | ||
+ | Lets measure the light in the room with LDR | ||
+ | Turns on an LED on , then off , repeatedly according to the Light. | ||
+ | */ | ||
+ | |||
+ | // Pin 13 has an LED connected on most Arduino boards. | ||
+ | // LDR is connected to analog input A0 as shown in Diagram. | ||
+ | // give it a name: | ||
+ | int led = 13; | ||
+ | // the setup routine runs once when you press reset: | ||
+ | void setup() { | ||
+ | // initialize the digital pin as an output. | ||
+ | pinMode(led, OUTPUT); | ||
+ | } | ||
+ | // the loop routine runs over and over again forever: | ||
+ | void loop() { | ||
+ | digitalWrite(led, HIGH); // turn the LED on (HIGH is the voltage level) | ||
+ | delay(1000); // wait for a second | ||
+ | digitalWrite(led, LOW); // turn the LED off by making the voltage LOW | ||
+ | delay(1000); // wait for a second | ||
+ | } | ||
+ | </syntaxhighlight> |
Latest revision as of 16:53, 15 September 2014
Code
/* Lets measure the light in the room with LDR Turns on an LED on , then off , repeatedly according to the Light. */ // Pin 13 has an LED connected on most Arduino boards. // LDR is connected to analog input A0 as shown in Diagram. // give it a name: int led = 13; // the setup routine runs once when you press reset: void setup() { // initialize the digital pin as an output. pinMode(led, OUTPUT); } // the loop routine runs over and over again forever: void loop() { digitalWrite(led, HIGH); // turn the LED on (HIGH is the voltage level) delay(1000); // wait for a second digitalWrite(led, LOW); // turn the LED off by making the voltage LOW delay(1000); // wait for a second }