Merge pull request #305 from dastels/master

Add code for head tilt activated ears

Head_Tilt_Ears/code.py

@@ -0,0 +1,42 @@
+"""
+Circuit Playground Express head-tilt activated ears.
+
+Adafruit invests time and resources providing this open source code.
+Please support Adafruit and open source hardware by purchasing
+products from Adafruit!
+
+Written by Dave Astels for Adafruit Industries
+Copyright (c) 2018 Adafruit Industries
+Licensed under the MIT license.
+
+All text above must be included in any redistribution.
+"""
+
+import time
+import busio
+import board
+import adafruit_lis3dh
+import simpleio
+
+# Setup accelerometer
+i2c = busio.I2C(board.ACCELEROMETER_SCL, board.ACCELEROMETER_SDA)
+sensor = adafruit_lis3dh.LIS3DH_I2C(i2c, address=0x19)
+
+# Setup servos
+left_ear = simpleio.Servo(board.A1)
+right_ear = simpleio.Servo(board.A2)
+
+#initialize things
+left_ear.angle = 0
+right_ear.angle = 0
+
+while True:
+    x, _, _ = sensor.acceleration
+    if x < -5.0:
+        left_ear.angle = 90
+    elif x > 5.0:
+        right_ear.angle = 90
+    elif abs(x) < 4.0:
+        left_ear.angle = 0
+        right_ear.angle = 0
+    time.sleep(0.1)