blink or duty cycle without using delay, with use of modulus operator

Using Arduino Programming Questions
1

To whom it may concern: An example how to use the modulus operator for making something go periodically on/off, with duty cycle and frequency of your choice. Not for critical timing functions, but for slow stuff I think it's good.

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);

}

void loop() {
  // put your main code here, to run repeatedly:
  Serial.println(millis()%60000<10000); // you chose duty cycle and period; example 10s HIGH and 50s LOW during the 60s period
  delay(1000);
}
2

have you considered

if (! (millis() % N)
3

gcjr:
have you considered

if (! (millis() % N)

hmm, I think you risk missing the 'millis' count where the modulus result is zero. You also have no control over duty cycle.

4

The '%' operator is computationally expensive compared with the standard comparison and increment. It's taking a step backwards.

5

just ran this piece of code:

uint32_t nowMillis;
uint32_t prevMillis;
boolean thing;
void loop() {
  // put your main code here, to run repeatedly:
  prevMillis=micros();
  thing=millis()%60000<10000; // you chose duty cycle and period; example 10s HIGH and 50s LOW during the 60s period
  nowMillis=micros();
  Serial.println("modulus operator took " + String(nowMillis-prevMillis) + " micro-seconds to compute"); 
  Serial.println("thing state: " + String(thing));
  delay(1000);
}

result from the serial monitor:

modulus operator took 2 micro-seconds to compute
thing state: 1
modulus operator took 2 micro-seconds to compute
thing state: 1
modulus operator took 2 micro-seconds to compute
thing state: 0
modulus operator took 2 micro-seconds to compute
thing state: 0
modulus operator took 2 micro-seconds to compute
thing state: 0
modulus operator took 2 micro-seconds to compute
thing state: 0
modulus operator took 2 micro-seconds to compute
thing state: 0
modulus operator took 2 micro-seconds to compute

When the code is much more elegant and compact than comparison and increment solution, who cares about 2 micro-seconds?

6