hi to everyone who reads this!
I am from the UK and need some help with a project. I have a coin hopper/dispenser and want to connect it via an UNO to a microphone. the idea is that when a sound is heard (volume programmable on microphone) it will then turn the hopper motor on and allow it to dispense a set amount of coins. I had some code written for me but want to check if it would work before i go ahead and buy all of the components...!
Any help would be appreciated!
Here is code:
//********* Hopper initiated by Mic **************
#define micThreshold 500 //If the value read from the mic is above this value then a sound has been heared.
byte amountToDispenseIfSoundHeared = 10; //change this value to how many coins you want to dispense when a sound is heared
#define hopperSensorPin 3
#define motorDrivePin 2
#define micInputPin A0 //connect mic pin to analog input AO
byte amountToDispense = 0;
volatile byte amountDispensed = 0;
volatile boolean dispensing = false; //flag to track if currently dispensing
void setup() {
Serial.begin(9600);
attachInterrupt(digitalPinToInterrupt(hopperSensorPin), coinPulse, FALLING);
pinMode(hopperSensorPin, INPUT_PULLUP);
pinMode(motorDrivePin, OUTPUT);
digitalWrite(motorDrivePin, HIGH);
Serial.println("Hopper Program Started");
}
void loop()
{
int micReading = analogRead(micInputPin);
//Serial.println(micReading); //uncomment this to see what reading is coming from the mic when a sound is heared.
if ((micReading > 500) && !dispensing) //if a reading is over the threshold and not currently dispensing then start to dispense.
{
amountToDispense = amountToDispenseIfSoundHeared;
digitalWrite(motorDrivePin, LOW);
dispensing = true;
}
delay(5); //small delay to allow the analog to digital read to settle
}
void coinPulse()
{
++amountDispensed;
if (amountDispensed == amountToDispense)
{
Serial.println("Completed");
digitalWrite(motorDrivePin, HIGH);
amountDispensed = 0;
dispensing = false;
}
}
Thanks 