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   1 // sketch_05_01_prescale
   2
   3 #include <Prescaler.h>
   4
   5 void setup()
   6 {
   7   pinMode(13, OUTPUT);
   8   setClockPrescaler(CLOCK_PRESCALER_256);
   9 }
  10
  11 void loop()
  12 {
  13   digitalWrite(13, HIGH);
  14   trueDelay(1000);
  15   digitalWrite(13, LOW);
  16   trueDelay(5000);
  17 }