diff --git a/modules/show-knob-values/show-knob-values.ino b/modules/show-knob-values/show-knob-values.ino
new file mode 100644
index 0000000..128d31d
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+++ b/modules/show-knob-values/show-knob-values.ino
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+/*
+  Pitch follower
+
+  Plays a pitch that changes based on a changing analog input
+
+  circuit:
+  - 8 ohm speaker on digital pin 9
+  - photoresistor on analog 0 to 5V
+  - 4.7 kilohm resistor on analog 0 to ground
+
+  created 21 Jan 2010
+  modified 31 May 2012
+  by Tom Igoe, with suggestion from Michael Flynn
+
+  This example code is in the public domain.
+
+  http://www.arduino.cc/en/Tutorial/Tone2
+*/
+
+void setup() {
+  // initialize serial communications (for debugging only):
+  Serial.begin(9600);
+}
+
+void loop() {
+  // read the sensor:
+  int sensorReading = analogRead(0);
+  // print the sensor reading so you know its range
+  Serial.print("0: ");
+  Serial.print(sensorReading);
+
+  Serial.print(", 1: ");
+  Serial.print(analogRead(1));
+  Serial.print(", 2: ");
+  Serial.print(analogRead(2));
+  Serial.print(", 3: ");
+  Serial.println(analogRead(3));
+
+// map the analog input range (in this case, 400 - 1000 from the photoresistor)
+  // to the output pitch range (120 - 1500Hz)
+  // change the minimum and maximum input numbers below depending on the range
+  // your sensor's giving:
+  int thisPitch = map(sensorReading, 400, 1000, 120, 1500);
+
+  // play the pitch:
+  // tone(11, thisPitch, 10);
+  delay(250);        // delay in between reads for stability
+}