Changing four LEDs blink speed by button + and -

Using Arduino Project Guidance
#1

I'm newcomer and i don't know how to change blink speed of 4 LEDs by two buttons. If I push + button, speed will increase, if I push - button, speed will decrese. Please help.

#2

Are all the LEDs flashing at the same speed ?

Have you looked at and understood the BlinkWithoutDelay example in the IDE ? Do you understand what controls the flashing period in that sketch ?

Have you looked at and understood the Button example in the IDE ?

You will need to detect when the button becomes pressed rather than when it is pressed so looking at the StateChangeDetection in the IDE would be a good idea

#3

Hi,
Welcome to the forum.

Please read the first post in any forum entitled how to use this forum.
http://forum.arduino.cc/index.php/topic,148850.0.html .

Have you any code written?
Have you written any sort of code for the Arduino?

Thanks.. Tom.. :slight_smile:

#4