Hi EveryoneI am new to Arduino and I have an led project i'd like to attempt. I have 5 x 1m strips of led's operating on a 12vdc supply. I need to have them switch on sequentially, but with fading. When triggered, strip 1 needs to fade in to maximum brightness, stay on for 2 minutes and fade out. Strip 2 will then fade in and do the same for the rest until strip 5 fades out. Sequence would then start again. I have fairly good electronic knowledge but not on arduino. Please advise as to what I require to get me started. Thanks Guys.
Apologies for not giving more info on the led strips. I am using the single colour white led strips, so they will only have 2 wires 12v+ and neg. Is it possible with these? Thanks
The " standard" PWM frequency on the Arduno boards is 500 Hz. Frequencies over 100-120hz are not visible to most people.It may have more to do with the 8- bit resolution of the Ardinos PWM signal in combination with the non linearity of the human brightness perception.In my own projects trippylighting.com I use an Led driver board http://ledshield.wordpress.com/ with 12 bit resolution, allowing me a CIE brightness corrected dimming, alas at about 120Hz (IIRC) PWM frequency. Smooth as butter dimming without any perceivable flicker.