Rgb Led Help Needed

Quote:

im having a great deal of trouble trying to sync 2 of the RGB leds i have for my robots eyes.

if you want blink two common anode rgd leds at same time:

# rgb 1 led pins
$rgb1_red=0
$rgb1_green=1
$rgb1_blue=2

# rgb 2 led pins
$rgb2_red=4
$rgb2_green=5
$rgb2_blue=6

$active=false
:loop
  if ($active=true)
    # orange
    pwm($rgb1_red, 100-99)
    pwm($rgb1_green, 100-64)
    pwm($rgb1_blue, 100-0)

    # orange
    pwm($rgb2_red, 100-99)
    pwm($rgb2_green, 100-64)
    pwm($rgb2_blue, 100-0)

    $active=false
  ELSE
    # off
    set($rgb1_red, on)
    set($rgb1_green, on)
    set($rgb1_blue, on)
    # off
    set($rgb2_red, on)
    set($rgb2_green, on)
    set($rgb2_blue, on)

    $active=true
  endif
  Sleep(500)
goto(loop)

edited my incorrect post. Missed the difference in the two diagrams and mixed up cathode and anode terms.... For something so simple, it sure does get complex.....

Alan

someone told me all leds have diff speeds. you have to by a bag full leds and look for the 2 that have desame speed.

@nomad

Quote:

someone told me all leds have diff speeds.

when they change color from full leds.

I think @Nomad is talking about self-cycling RGB LEDs. They are never the same speed from one to another. They are bit analog that way.

@Nomad 6R, Plain (diode only) RGB leds don't have speed.

RGB led is a single component, but the reality are 3 different leds in a single container.

Not all leds are equal, so is important to check the led details

RGB led example:

All the 3 leds share the same forward current 20 ma with a max of 30 ma (before blowing up)

Different colors = Different wave lengths

Different colors different forward voltages, this means in similar conditions the brightness will be different.

ohm law: I = V/R

R = 330 (builtin EZB/Iottiny resistor)

I (Red) = (3.3 - 2.0) / 330 => 3.93 mA I (Green/Blue) = (3.3 - 3.2) / 330 => 0.30 mA

This means Red will be more bright than Green and Blue

jeremie yes i didn now the name of these leds.

php learn some again.rgb have no speed.