capacitiveSensor_ConductiveInk_simpleSketch.ino

#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
int ledPin = 5; 
void setup()
{
  cs_4_2.set_CS_AutocaL_Millis(0xFFFFFFFF);     // turn off autocalibrate on channel 1 - just as an example
  Serial.begin(9600);
  pinMode(ledPin, OUTPUT);
  analogWrite(ledPin, 0);
}

void loop()
{
  long start = millis();
  long total1 =  cs_4_2.capacitiveSensor(30);

  Serial.println(total1);                  // print sensor output 1

  if (total1 > 70) {
    analogWrite(ledPin, total1 * 3);
  } else {
    analogWrite(ledPin, 0);
  }
  delay(10);                             // arbitrary delay to limit data to serial port
}