#define NUMREADINGS 25 // Raise number to increase data smoothing
int senseLimit = 1023; // Raise number to decrease sensitivity of 
 // the antenna (up to 1023 max)
int probePin = 5; // Set analog pin 5 as the antenna pin
int val = 0; // Reading from probePin
// Pin connections to LED bar graph with resistors in series
int LED1 = 11; 
int LED2 = 10;
int LED3 = 9;
int LED4 = 8; 
int LED5 = 7; 
int LED6 = 6; 
int LED7 = 5; 
int LED8 = 4; 
int LED9 = 3; 
int LED10 = 2;
int readings[NUMREADINGS]; // Readings from the analog input
int index = 0; // Index of the current reading
int total = 0; // Running total
int average = 0; // Final average of the probe reading
void setup() {
 pinMode(2, OUTPUT); // Set LED bar graph pins as outputs
 pinMode(3, OUTPUT);
 pinMode(4, OUTPUT);
 pinMode(5, OUTPUT);
 pinMode(6, OUTPUT);
 pinMode(7, OUTPUT);
 pinMode(8, OUTPUT);
 pinMode(9, OUTPUT);
 pinMode(10, OUTPUT);
 pinMode(11, OUTPUT);
 Serial.pinMode(9600); // Initiate serial connection with IDE for 
 // debugging and so on
 for (int i = 0; i < NUMREADINGS; i++)
 readings[i] = 0; // Initialize all readings to 0
}
void loop() {
 val = analogRead(probePin); // Take a reading from probe
 if (val >= 1) { // If the reading isn't zero, proceed
 val = constrain(val, 1, senseLimit); // If the reading is 
 // higher than the current 
 // senseLimit value, update 
 // senseLimit value with 
 // higher reading
 val = map(val, 1, senseLimit, 1, 1023); // Remap the constrained 
 // value within a 1 to 
 // 1023 range
 total -= readings[index]; // Subtract the last reading
 readings[index] = val; // Read from the sensor
 total += readings[index]; // Add the reading to the total
 index = (index + 1); // Advance to the next index
 if (index >= NUMREADINGS) // If we're at the end of the array
 index = 0; // loop around to the beginning
 average = total / NUMREADINGS; // Calculate the average reading
 if (average > 50) { // If the average reading is higher than 50
 digitalWrite(LED1, HIGH); // turn on the first LED
 }
 else { // If it's not
 digitalWrite(LED1, LOW); // turn off that LED
 }
 if (average > 150) { // And so on
 digitalWrite(LED2, HIGH);
 }
 else {
 digitalWrite(LED2, LOW);
 }
 if (average > 250) {
 digitalWrite(LED3, HIGH);
 }
 else {
 digitalWrite(LED3, LOW);
 }
 if (average > 350) {
 digitalWrite(LED4, HIGH);
 }
 else {
 digitalWrite(LED4, LOW);
 }
 if (average > 450) {
 digitalWrite(LED5, HIGH);
 }
 else {
 digitalWrite(LED5, LOW);
 }
if (average > 550) {
 digitalWrite(LED6, HIGH);
 }
 else {
 digitalWrite(LED6, LOW);
 }
 if (average > 650) {
 digitalWrite(LED7, HIGH);
 }
 else {
 digitalWrite(LED7, LOW);
 }
 if (average > 750) {
 digitalWrite(LED8, HIGH);
 }
 else {
 digitalWrite(LED8, LOW);
 }
 if (average > 850) {
 digitalWrite(LED9, HIGH);
 }
 else {
 digitalWrite(LED9, LOW);
 }
 if (average > 950) {
 digitalWrite(LED10, HIGH);
 }
 else {
 digitalWrite(LED10, LOW);
 }
 Serial.println(val); // Use output to aid in calibrating
 }
}