IDeATe

Outcome

Intention

Using sensors, inputs, and LED, I wanted to make a small IoT device that enhances my inner ba dum tss, especially listening to rhythmic music alone in my room.

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Context

Sensors that sense my finger tapping, a potentiometer that adjusts the intensity of LED light, and three LED lights that express my inner joy toward outside. The force sensor will sense the intensity of my tapping and this will affect the number of LED lights that are lit.

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Process

Connecting LED
Wiring up a potentiometer
Install a force sensor
Finally, combine three elements by writing a code
Adjust force sensing conditional value by checking the value displayed on the Particle console.

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Product

Ba dum tss!

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/*
* Skills Dev 2
* 11.07.2023
* @author: Nik Kim
*/

// A forceResistor
int force = A4;

// A Potentiometer pin
int pot = A1;

// Three LED pins
int red = D6;
int yellow = D5;
int green = D4;

// Create a variable to hold the analogue input
int potReading;
int forceReading;
int ledBrightness;

void setup() {
    // Set up the LED for output
    pinMode(red, OUTPUT);
    pinMode(yellow, OUTPUT);
    pinMode(green, OUTPUT);
    
    // Create a cloud variable of type integer
    // called 'light' mapped to photoCellReading
    Particle.variable("Your finger power is:", &forceReading, INT);
    }

void loop() {
    // Use analogRead to read the pot value
    potReading = analogRead(pot);    
    // Use analogRead to read the force value
    forceReading = analogRead(force);
    
    // Map this value into the PWM range (0-255)
    // and store as the led brightness
    ledBrightness = map(potReading, 0, 4095, 0, 255);
    
    // Based on the force
    // change numbers of LED to light up
    if (forceReading >= 1000 and forceReading < 2000) {
        analogWrite(green, ledBrightness);
    } else if (forceReading >= 2000 and forceReading < 3000) {
        analogWrite(green, ledBrightness);
        analogWrite(yellow, ledBrightness);
    } else if (forceReading >= 3000 and forceReading < 4000) {
        analogWrite(green, ledBrightness);
        analogWrite(yellow, ledBrightness);
        analogWrite(red, ledBrightness);
    }

    delay(100);
    
    digitalWrite(green, LOW);
    digitalWrite(yellow, LOW);
    digitalWrite(red, LOW);
}

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