Random Number Generator
Download the Entropy library by Walter Anderson (GPL3) and copy the "Entropy" folder into the "libraries" folder eg C:\Program Files (x86)\Arduino\libraries
Then the code below should compile and make an LED on PB0 flash pseudo-randomly.
randomSeed() sets the initial state of the pseudo random number generator. Try changing it to randomSeed(1) and it will do the same blink pattern each time!#include <Entropy.h>
void setup() {
Entropy.initialize();
int seed_value = Entropy.random();
randomSeed(seed_value);
pinMode(PB0, OUTPUT); //LED on Model B
}
void loop() {
int rand = random(1,3);
if (rand == 1) {
digitalWrite(0, HIGH);
} else {
digitalWrite(0, LOW);
}
delay(100);
}