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Merge branch 'master' of github.com:adafruit/Adafruit_Learning_System_Guides

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ladyada 2017-10-13 00:41:45 -04:00
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Introducing_CircuitPlaygroundExpress/CircuitPlaygroundExpress_LightSensor.py
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# CircuitPlaygroundExpress_LightSensor
# reads the on-board light sensor and graphis the brighness with NeoPixels
# reads the on-board light sensor and graphs the brighness with NeoPixels
from digitalio import DigitalInOut, Direction
from simpleio import map_range
from analogio import AnalogIn
import board
import neopixel
import time
pixels = neopixel.NeoPixel(board.NEOPIXEL, 10, auto_write=0, brightness=.1)
pixels = neopixel.NeoPixel(board.NEOPIXEL, 10, auto_write=0, brightness=.05)
pixels.fill((0,0,0))
pixels.show()
led = DigitalInOut(board.D13)
led.direction = Direction.OUTPUT
analogin = AnalogIn(board.LIGHT)
# def mapColor(pin): #helper
# return pin.value / 100
#
def remapRange(value, leftMin, leftMax, rightMin, rightMax):
#this remaps a value from original (left) range to new (right) range
# Figure out how 'wide' each range is
leftSpan = leftMax - leftMin
rightSpan = rightMax - rightMin
# Convert the left range into a 0-1 range (int)
valueScaled = int(value - leftMin) / int(leftSpan)
# Convert the 0-1 range into a value in the right range.
return int(rightMin + (valueScaled * rightSpan))
while True:
#light value remaped to pixel position
#print("Value translate %d" % remapRange(analogin.value, 0, 65000, 0, 9))
peak = remapRange(analogin.value, 0, 65000, 0, 9)
for i in range(0, peak, 1):
#light up pixels in range 0 to the remaped light read
pixels[i] = (0,255,0)
#turn off pixels above peak range
for j in range(peak+1, 10, 1):
pixels[j] = (0, 0, 0)
pixels.show()
peak = map_range(analogin.value, 2000, 62000, 0, 9)
print(analogin.value)
print(int(peak))
time.sleep(0.1)
for i in range(0, 9, 1):
if i <= peak:
pixels[i] = (0, 255, 0)
else:
pixels[i] = (0,0,0)
pixels.show()
time.sleep(0.01)