Merge pull request adafruit#372 from adafruit/TheKitty-patch-27

Create code.py for Pumpkin Theremin

Author: TheKitty

Pumpkin_Theremin/code.py

@@ -0,0 +1,45 @@
+import time
+import board
+import adafruit_hcsr04
+from adafruit_circuitplayground.express import cpx
+
+# This line creates the distance sensor as an object.
+sonar = adafruit_hcsr04.HCSR04(trigger_pin=board.D9, echo_pin=board.D6, timeout=0.1)
+pixels = cpx.pixels
+pitchMultiplier = 300   # Change this value to modify the pitch of the theremin.
+
+def wheel(pos):
+    # Input a value 0 to 255 to get a color value.
+    # The colours are a transition r - g - b - back to r.
+    if pos < 0 or pos > 255:
+        return (0, 0, 0)
+    if pos < 85:
+        return (255 - pos * 3, pos * 3, 0)
+    if pos < 170:
+        pos -= 85
+        return (0, 255 - pos * 3, pos * 3)
+    pos -= 170
+    return (pos * 3, 0, 255 - pos * 3)
+
+while True:
+    try:
+        handDistance = int(sonar.distance)
+        print("Distance:", handDistance)
+    except RuntimeError:
+        print("retrying!")
+        time.sleep(.00001)
+        break
+
+    pitch = handDistance*pitchMultiplier
+
+    # Limits on the distances that trigger sound/light to between 3 and 25 cm.
+    if (handDistance >= 3) & (handDistance < 25):
+        cpx.play_tone(pitch, 0.1)
+        pixels.fill(wheel(handDistance*10))
+        pixels.show()
+        time.sleep(.00001)
+        print(pitch)
+    else:
+        cpx.stop_tone()
+        pixels.fill((0, 0, 0))
+        pixels.show()