Mapping: It's Finicky

Getting the RGB LED to respond like I wanted was more difficult than I thought it would be. My original idea was to have this project be a interactive example on how our country ignore the science of climate change using the light sensor and water sensor. As I put everything together it all worked, but it didn't work the way I was hoping so I had to table the idea for another time. I believe my main issue was with the light sensor, but I didn't have the time to redo what I have put together.

The result of all of this is an LED light that can be manipulated in three different ways: light sensor, potentiometer, and water sensor. The potentiometer can also be used to activate the active buzzer after crossing a certain threshold. 

Materials:

• 17 Jumper Wires
• 1 Arduino UNO
• 1 RGB LED
• 3 220ohm resistors
• 1 photoresistor
• 1 Water Sensor
• 1 Potentiometer
• 1 active buzzer

Active Buzzer Schematic

LED Schematic

Potentiometer Schematic

Water Sensor Schematic

Original Sketch

	const int bluePin = 3;
	const int greenPin = 5;
	const int redPin = 6;
	int index = 0;
	int multiplier = 5;
	//waterlevel
	int waterLevel = 5;
	int HistoryValue = 0;
	char printBuffer[128];
	//buzzer
	int buzzer = 12;//the pin of the active buzzer
	void setup() {
	// put your setup code here, to run once:
	pinMode(bluePin, OUTPUT);
	pinMode(redPin, OUTPUT);
	pinMode(greenPin, OUTPUT);
	pinMode(buzzer,OUTPUT);//initialize the buzzer pin as an output
	Serial.begin(9600);
	}
	void loop() {
	//potentiometer
	int potVal = analogRead(A0);
	delay(1);
	//light detector
	int photoVal = analogRead(A2);
	//mapping
	//mapping potentiometer
	int mappedVal = map(potVal, 0, 1023, 255, 0);
	analogWrite(greenPin, mappedVal);
	if(mappedVal >= 55){
	digitalWrite(buzzer, HIGH);
	}
	else {
	digitalWrite(buzzer, LOW);
	}
	//mapping photoresistor
	int mappedVal2 = map(photoVal, 0, 1023, 0, 255);
	analogWrite(bluePin, mappedVal2);
	//map water level
	int mappedVal5 = map(waterLevel, 0, 1023, 0, 255);
	Serial.print(potVal);
	Serial.print("\t");
	Serial.println(mappedVal);
	//water level
	int value = analogRead(waterLevel); // get adc value
	analogWrite(redPin, value);
	//manipulation
	//water level print
	if(((HistoryValue>=value) && ((HistoryValue - value) > 10)) || ((HistoryValue<value) && ((value - HistoryValue) > 10)))
	{
	sprintf(printBuffer,"ADC%d level is %d\n",waterLevel, value);
	Serial.print(printBuffer);
	HistoryValue = value;
	}
	// put your main code here, to run repeatedly:
	//on and off really quickly - pulse width modulation
	/*analogWrite(redPin, index);
	delay (10);
	if(index > 230) {multiplier = multiplier * -1;}
	if(index < 0) { multiplier = multiplier * -1;}
	index = index + multiplier;
	for(int x = 0; x > 230; x++){
	analogWrite(redPin, x);
	delay(10);
	}
	for(int x = 255; x > 0; x--){
	analogWrite(redPin, x);
	delay(10);
	}*/
	//Serial.println ("Blast!");
	}

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