Stirrer
Attached the motor to a spoon so you don't have to manually stir anymore. Speed of the stirring is controlled by a potentiometer. When the pot-meter is turned to zero, the piezo speaker will let you know.
int potPin = 0;
int motorPin = 9;
int speakerPin = 10;
int val = 0;
void setup() {
Serial.begin(9600);
pinMode(speakerPin, OUTPUT);
}
void loop() {
val = analogRead(potPin);
analogWrite(motorPin, val/4);
if (val == 0){{
digitalWrite(speakerPin, HIGH);
delay(10);
digitalWrite(speakerPin, LOW);
}
}
}
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