codepot2015-arduino-workshop-snippet.ino

codepot2015-arduino-workshop-snippet.ino

#define CHARGE_PIN 13
#define DISCHARGING_PIN 12
#define VOLTAGE_PIN A0
#define R 10000.0F

void setup() {
  pinMode(CHARGE_PIN, OUTPUT);
  digitalWrite(CHARGE_PIN, LOW);
  Serial.begin(9600);
  Serial.print("hello world \n");
}

void loop() {

  // start charging
  long start = millis();
  digitalWrite(CHARGE_PIN, HIGH);
  while(analogRead(VOLTAGE_PIN)<648) {
    Serial.print(float((analogRead(VOLTAGE_PIN)+1))/1024*100);
    Serial.println(" %");
  }
  long elapsed = millis() - start;
  float capacitance = float(elapsed)/R*1000;
  Serial.print(capacitance);
  Serial.println(" uF");

  // start discharging
  digitalWrite(CHARGE_PIN, LOW);
  pinMode(DISCHARGING_PIN, OUTPUT); // ???
  digitalWrite(DISCHARGING_PIN,LOW);

  while(analogRead(VOLTAGE_PIN)>0){
    // discharging 
  }

  digitalWrite(DISCHARGING_PIN,INPUT);
  delay(1000);

}