===== LED dimmer =====
This example shows how to fade-in and fade-out a red LED by using PWM output.

==== Requirements: ====

  * Uper1 board

==== Code: ====
<code python>
from time import sleep
from IoTPy.pyuper.uper import UPER1

with UPER1() as board, board.PWM(27) as redPin:

    redPin.set_frequency(1000)

    while True:
        for i in xrange(0, 100):
            redPin.set_duty_cycle(i)
            sleep(0.01)
        for i in reversed(xrange(0, 100)):
            redPin.set_duty_cycle(i)
            sleep(0.01)
</code>

===== Color spinner =====
This example shows how three PWM channels can be combined to create a visually nice color spinner.

==== Requirements: ====
  * Uper1 board

==== Code: ====
<code python>
from colorsys import hls_to_rgb
from time import sleep
from IoTPy.pyuper.uper import UPER1

with UPER1() as board, \
        board.PWM(27, polarity=0) as redPin,\
        board.PWM(28, polarity=0) as greenPin,\
        board.PWM(34, polarity=0) as bluePin:

    while True:
        for color in xrange(500):
            rgb = hls_to_rgb(color*0.002, 0.1, 1)
            redPin.set_duty_cycle(rgb[0]*100)
            greenPin.set_duty_cycle(rgb[1]*100)
            bluePin.set_duty_cycle(rgb[2]*100)
            sleep(0.002)
</code>