Create screamingCauldron.py

ScreamingCauldron/screamingCauldron.py

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+# Screaming Cauldron
+# for Adafruit Industries Learning Guide
+
+from digitalio import DigitalInOut, Direction#, Pull
+from analogio import AnalogIn
+import neopixel
+import board
+import time
+
+led = DigitalInOut(board.D13) #on board red LED
+led.direction = Direction.OUTPUT
+
+aFXPin = DigitalInOut(board.D2) #pin used to drive the AudioFX board
+aFXPin.direction = Direction.OUTPUT
+
+aFXPin.value = False #runs once at startup
+time.sleep(.1) #pause a moment
+aFXPin.value = True #then turn it off
+
+analog0in = AnalogIn(board.D1)
+neoPin = board.D0 #pin int0 which the NeoPixels are plugged
+numPix = 30 #number of NeoPixels
+pixels = neopixel.NeoPixel(neoPin, numPix, auto_write=0, brightness=.8)
+pixels.fill((0,0,0,))
+pixels.show()
+
+def getVoltage(pin):
+    return (pin.value * 3.3) / 65536
+
+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:
+    distRaw = analog0in.value #read the raw sensor value
+    print("A0: %f" % distRaw) #write raw value to REPL
+    distRedColor = remapRange(distRaw, 0, 64000, 0, 255)
+    distGreenColor =  remapRange(distRaw, 0, 64000, 200, 0)
+    if(distRaw>40000): #at about 4 inches, this goes off!
+        led.value = True
+        aFXPin.value = False
+        time.sleep(.35)
+
+    else:
+        led.value = False
+        aFXPin.value = True
+
+    #change pixel colors based on proximity
+
+    print(distRedColor, distGreenColor, (distRedColor + distGreenColor))
+    pixels.fill((distRedColor, distGreenColor, 0))
+
+    pixels.write()
+
+    time.sleep(0.1)