Capacitance fir st commit,

[sketchbook_andrea] / advanced_projects / capacitance / led_binary / led_binary.ino

diff --git a/advanced_projects/capacitance/led_binary/led_binary.ino b/advanced_projects/capacitance/led_binary/led_binary.ino
new file mode 100644 (file)
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+++ b/advanced_projects/capacitance/led_binary/led_binary.ino
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+#include <CapacitiveSensor.h>
+
+/*
+ * CapitiveSense Library Demo Sketch
+ * Paul Badger 2008
+ * Uses a high value resistor e.g. 10M between send pin and receive pin
+ * Resistor effects sensitivity, experiment with values, 50K - 50M. Larger resistor values yield larger sensor values.
+ * Receive pin is the sensor pin - try different amounts of foil/metal on this pin
+ */
+
+
+CapacitiveSensor   cs_4_2 = CapacitiveSensor(4, 2);       // 10M resistor between pins 4 & 2, pin 2 is sensor pin, add a wire and or foil if desired
+// pin 8 is sensor pin, add a wire and or foil
+const int led = 13;        // pin that the Piezo is attached to
+int sensorMin = 50;        // minimum sensor value
+int sensorMax = 3200;           // maximum sensor value
+void setup()
+{
+  cs_4_2.set_CS_AutocaL_Millis(0xFFFFFFFF);     // turn off autocalibrate on channel 1 - just as an example
+  Serial.begin(9600);
+  pinMode(led, OUTPUT);
+}
+
+void loop()
+{
+  long start = millis();
+  long total1 =  cs_4_2.capacitiveSensor(30);
+
+  if (total1 > (sensorMax / 2 - sensorMin)) {
+    digitalWrite(led, HIGH);
+    delay(100);
+  }
+  else {
+    digitalWrite(led, LOW);
+    delay(100);
+  }
+
+  Serial.print(millis() - start);        // check on performance in milliseconds
+  Serial.print("\t Capacitance: ");                    // tab character for debug windown spacing
+
+  Serial.println(total1);                  // print sensor output 1
+  delay(1);                             // arbitrary delay to limit data to serial port
+
+}