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@interstar
Created January 26, 2016 17:30
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#include <Bounce.h>
int anaPin = 5; // Analogue in pin
int button = 2; // button pin
int beepPin = 3; // piezo buzzer
// edges of our calibration window
float aMax;
float aMin;
float anIn, scaledValue; // actual analogue input value and the scaled value
int calibrationMode; // are we in calibration mode or normal? calibrationMode == 1 when in calibration mode
Bounce bb = Bounce(button,0.01); // a Bounce object to debounce the push button
void setup() {
Serial.begin(9600);
pinMode(button,INPUT);
pinMode(beepPin,OUTPUT);
calibrationMode = 1;
}
void calibrate() {
if (anIn != 0) { // don't calibrate when no current running through graphite
if (anIn > aMax) {
aMax = anIn;
}
if (anIn < aMin) {
aMin = anIn;
}
/*
Serial.print(anIn);
Serial.print(", ");
Serial.print(aMin);
Serial.print(" - ");
Serial.println(aMax);
*/
noTone(beepPin);
}
}
void oneBeep(int pitch) {
tone(beepPin, pitch);
delay(100);
noTone(beepPin);
delay(50);
}
void doubleBeep(int pitch) {
oneBeep(pitch);
oneBeep(pitch);
oneBeep(pitch);
}
void loop() {
anIn = analogRead(anaPin);
// button handler
bb.update();
if (bb.risingEdge()) {
if (calibrationMode == 0) {
aMax=-9999;
aMin=9999;
doubleBeep(400);
calibrationMode = 1;
} else {
calibrationMode = 0;
doubleBeep(200);
}
}
if (calibrationMode) {
calibrate();
scaledValue = -1;
} else {
scaledValue = map(anIn,aMin,aMax,50,1200);
if (anIn != 0) {
tone(beepPin, scaledValue);
Serial.print("[");
Serial.print(scaledValue);
Serial.println("]");
delay(10);
} else {
noTone(beepPin);
}
}
}
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