3x3 LED fading grid
hi, first time arduino project.
using uno, want do, this;
from 7am, first 3 leds on bottom fade in until @ full brightness, followed second third on next 2 hours, 9 leds stay on until 6pm, top row fade leds down again until leds off on following 2 hours, until 7am next day, repeat.
thanks help!
using uno, want do, this;
from 7am, first 3 leds on bottom fade in until @ full brightness, followed second third on next 2 hours, 9 leds stay on until 6pm, top row fade leds down again until leds off on following 2 hours, until 7am next day, repeat.
thanks help!
your average arduino has enough pins onw led every pin. not "analog" out (pwm capable).
two possibilities - "bit bang" - fun way of saying turn led on , off fast enough in right ratio in program have same effect.
the other 1 add electronics multiplex pwm on leds or have external chips pwm.
and 3rd 1 write specifications lttle clearer. if each row has same dimming, can either wire leds in series , use pwm pins have - steering 3 groups. , other possible combinations depending on patterns want
two possibilities - "bit bang" - fun way of saying turn led on , off fast enough in right ratio in program have same effect.
the other 1 add electronics multiplex pwm on leds or have external chips pwm.
and 3rd 1 write specifications lttle clearer. if each row has same dimming, can either wire leds in series , use pwm pins have - steering 3 groups. , other possible combinations depending on patterns want
Arduino Forum > Using Arduino > LEDs and Multiplexing > 3x3 LED fading grid
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