Week12

Part1 Love O Meter

利用TMP電阻感應去增加亮燈數目

const int sensorPin = A0; const float baselineTemp = 26.0; //起始溫度

void setup() { Serial.begin(9600); for (int pinNumber = 2; pinNumber < 5; pinNumber++) { pinMode(pinNumber, OUTPUT); digitalWrite(pinNumber, LOW); } }

void loop() { int sensorVal = analogRead(sensorPin); Serial.print("Sensor Value: "); Serial.print(sensorVal); float voltage = (sensorVal/1024.0) * 5.0; Serial.print(", Volts:"); Serial.print(voltage); Serial.print(", degrees C: "); float temperature = (voltage - .5) * 100; Serial.println(temperature); if (temperature < baselineTemp) { digitalWrite(2, LOW); digitalWrite(3, LOW); digitalWrite(4, LOW); } else if (temperature >= baselineTemp + 2 && temperature < baselineTemp + 4) //增加四度亮第一顆 { digitalWrite(2, HIGH); digitalWrite(3, LOW); digitalWrite(4, LOW); } else if (temperature >= baselineTemp + 4 && temperature < baselineTemp + 6) //增加六度亮第二顆 { digitalWrite(2, HIGH); digitalWrite(3, HIGH); digitalWrite(4, LOW); } else if (temperature > baselineTemp + 6) //增加六度亮第三顆 { digitalWrite(2, HIGH); digitalWrite(3, HIGH); digitalWrite(4, HIGH); } delay(1); }

Part 2 Color Mixing LAMP

利用光敏電阻感應去改變顏色的亮度和變化

const int Brightness = 20; // set overall brightness, use lower value in darkroom to protect your eyes (0-255) const int greenLEDPin = 9; // LED connected to digital pin 9 const int redLEDPin = 10; // LED connected to digital pin 10 const int blueLEDPin = 11; // LED connected to digital pin 11 const int redSensorPin = A0; // pin with the photoresistor with the red gel const int greenSensorPin = A1; // pin with the photoresistor with the green gel const int blueSensorPin = A2; // pin with the photoresistor with the blue gel int redSensorValue = 0; // variable to hold the value from the red sensor int greenSensorValue = 0; // variable to hold the value from the green sensor int blueSensorValue = 0; // variable to hold the value from the blue sensor int redSensorHigh = 0; //High and low value for mapping. Notice that 'High' value were set low at 0, so that during calibration, its value would be be pushed up. See project 6. int greenSensorHigh = 0; int blueSensorHigh = 0; int redSensorLow = 1023; // the opposite is true for 'Low' value int greenSensorLow = 1023; int blueSensorLow = 1023; void setup() { // initialize serial communications at 9600 bps: Serial.begin(9600); // set the digital pins as outputs pinMode(greenLEDPin,OUTPUT); pinMode(redLEDPin,OUTPUT); pinMode(blueLEDPin,OUTPUT); //switching on your lamp before calibration, as it would affect calibration too, especially in dark environment analogWrite(redLEDPin, Brightness); analogWrite(greenLEDPin, Brightness); analogWrite(blueLEDPin, Brightness); //actual calibration which takes 10 seconds. During calibration, LED would shine at constant brightness. After that, it'll start to respond. while (millis() < 10000) { redSensorValue = analogRead(redSensorPin); //read pin if (redSensorValue > redSensorHigh) { //push 'High' value up based on sensor value. At the end of calibration, 'High' value would take the highest 'SensorValue' during the 10 seconds. redSensorHigh = redSensorValue; } if (redSensorValue < redSensorLow) { //opposite is true for 'Low' value redSensorLow = redSensorValue; } delay(5); greenSensorValue = analogRead(greenSensorPin); if (greenSensorValue > greenSensorHigh) { greenSensorHigh = greenSensorValue; } if (greenSensorValue < greenSensorLow) { greenSensorLow = greenSensorValue; } delay(5); blueSensorValue = analogRead(blueSensorPin); if (blueSensorValue > blueSensorHigh) { blueSensorHigh = blueSensorValue; } if (blueSensorValue < blueSensorLow) { blueSensorLow = blueSensorValue; } delay(5); } } void loop() { // Read the sensors first: // read the value from the red-filtered photoresistor: redSensorValue = analogRead(redSensorPin); // give the ADC a moment to settle delay(5); // read the value from the green-filtered photoresistor: greenSensorValue = analogRead(greenSensorPin); // give the ADC a moment to settle delay(5); // read the value from the blue-filtered photoresistor: blueSensorValue = analogRead(blueSensorPin); // print out the values to the serial monitor Serial.print("raw sensor Values \t red: "); Serial.print(redSensorValue); Serial.print("\t green: "); Serial.print(greenSensorValue); Serial.print("\t Blue: "); Serial.println(blueSensorValue); /* In order to use the values from the sensor for the LED, you need to do some math. The ADC provides a 10-bit number, but analogWrite() uses 8 bits. You'll want to divide your sensor readings by 4 to keep them in range of the output. */ /* Changed from a mere division by 4 in the original code to mapping. Lowest value recorded at calibration would be mapped to 0, and highest value would be mapped to brightness set earlier. The constraint function is set to prevent flickering, when value are negative or exceeds 255. */ int redValue = map(redSensorValue,redSensorLow,redSensorHigh,0,Brightness); redValue = constrain(redValue,0,255); //紅色最大值255 int greenValue = map(greenSensorValue,greenSensorLow,greenSensorHigh,0,Brightness); greenValue = constrain(greenValue,0,255); //綠色最大值255 int blueValue = map(blueSensorValue,blueSensorLow,blueSensorHigh,0,Brightness); blueValue = constrain(blueValue,0,255); //藍色最大值255 // print out the mapped values Serial.print("Mapped sensor Values \t red: "); Serial.print(redValue); Serial.print("\t green: "); Serial.print(greenValue); Serial.print("\t Blue: "); Serial.println(blueValue); /* Now that you have a usable value, it's time to PWM the LED. */ analogWrite(redLEDPin, redValue); analogWrite(greenLEDPin, greenValue); analogWrite(blueLEDPin, blueValue); }