2 blinking LEDs with 2 different frequencies

Other Hardware LEDs and Multiplexing
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Hey everybody :slight_smile:

We are a group at Aalborg university (Denmark), who are making a project where we need two LED light to blink at two different frequensies, at the same time - how do we manage that? :slight_smile:

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Like so many other places, that site uses int when byte is more appropriate - why use 2 bytes of memory when 1 will do?
Getting away from the blink without delay theme, here's another way to do this part:

    if (ledState == LOW)
      ledState = HIGH;
    else
      ledState = LOW;
    digitalWrite(ledPin, ledState);

// use this before setup() : byte ledState = 0;
ledState = 1 - ledState; // then this toggles from 1 to 0 to 1 to 0 to 1 to 0 - no if/else needed
digitalWrite (ledPin, ledState);