apc-calculations.js

var original = {
  resistorA: 470,
  resistorB: 1,
  capacitor: 0.01
};

var adapted = {
  resistorA: 100,
  resistorB: 0.27,
  capacitor: 0.047
};

function getChargeTime(circuit) {
  return 0.693 * (circuit.resistorA + circuit.resistorB) * circuit.capacitor;
}

function getDischargeTime(circuit) {
  return 0.693 * circuit.resistorB * circuit.capacitor;
}

function getTotalPeriod(circuit) {
  return getChargeTime(circuit) + getDischargeTime(circuit);
}

function getFrequency(circuit) {
  var frequency = 1.44 / ((circuit.resistorA + circuit.resistorB) * circuit.capacitor);

  // Making micro second readable
  var hz = frequency * 1000;

  if (hz > 1000) {
    return (hz / 1000).toFixed(4) + 'khz';
  } else {
    return hz.toFixed(4)  + ' hz';
  }

}

function getDutyCycle(circuit) {
  return circuit.resistorB / (circuit.resistorA + circuit.resistorB * 2)
}

function showStats(circuit, title) {
  console.log('\n' + title + '\n');
  console.log('Charge Time: ', getChargeTime(circuit).toFixed(4) + ' seconds');
  console.log('Discharge Time: ', getDischargeTime(circuit).toFixed(4) + ' seconds');
  console.log('Total Period: ', getTotalPeriod(circuit).toFixed(4));
  console.log('Frequency: ', getFrequency(circuit));
  console.log('Duty Cycle: ', getDutyCycle(circuit));
}

showStats(original, 'original');
showStats(adapted, 'adapted');