Published September 22, 2020

The Cool Coaster

This is a coaster that lets the user know when their drink is getting warm, so that they can ensure that they drink a cold beverage.

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Story

The Cool Coaster is a coaster that lets the user know that their drink is getting warm or not via a temperature sensor and some LEDs. The materials I used for this coaster are the Adafruit Circuitboard Playground Express, a potentiometer, paper plates, duct tape, Small Alligator Clips, a mini USB, and cut out freezer bags. When first making the coaster, I checked the temperature sensor to see what temperature would be best to signal a warm drink. I used the Arduino IDE with some basic temperature reading code that was provided with the Circuitboard Playground Express Library. After some testing, I found that the perfect temperature would be 77 degrees Fahrenheit.

I then began to construct the Chassis of the coaster, so that the alligator clips can fit under the circuit board and connect to the potentiometer. The potentiometer controls the brightness of the LEDs on the circuit board. I also controlled the potentiometer code using the Arduino IDE. I covered the wires with cut our paper plates, and I covered the circuit board with the cut out freezer bags so that none of the hardware gets wet. I used Duct tape to tie everything down.

Video Demo

Turned Off

When Warm

Materials used

Coaster_Temp

#include <Adafruit_CircuitPlayground.h>

float tempC, tempF;
int sensorPin=A3;
int sensorValue=0;

void setup() {
  Serial.begin(9600);
  CircuitPlayground.begin();
}

void loop() {
  tempC = CircuitPlayground.temperature();
  tempF = CircuitPlayground.temperatureF();

  sensorValue=analogRead(sensorPin)/4;
  if(sensorValue <=10){
    sensorValue=0;
  }

  CircuitPlayground.setBrightness(constrain(sensorValue,0,250));

  Serial.print("tempC: ");
  Serial.print(tempC);
  Serial.print("  tempF: ");
  Serial.println(tempF);


  

  if(tempF>=77)
  {
  CircuitPlayground.setPixelColor(0, 0xf83e4b);
  CircuitPlayground.setPixelColor(1, 0xf83e4b);
  CircuitPlayground.setPixelColor(2, 0xf83e4b);
  CircuitPlayground.setPixelColor(3, 0xf83e4b);
  CircuitPlayground.setPixelColor(4, 0xf83e4b);
  CircuitPlayground.setPixelColor(5, 0xf83e4b);
  CircuitPlayground.setPixelColor(6, 0xf83e4b);
  CircuitPlayground.setPixelColor(7, 0xf83e4b);
  CircuitPlayground.setPixelColor(8, 0xf83e4b);
  CircuitPlayground.setPixelColor(9, 0xf83e4b);
  
 
  }
  else
  {
  CircuitPlayground.setPixelColor(0, 0x0f0766);
  CircuitPlayground.setPixelColor(1, 0x0f0766);
  CircuitPlayground.setPixelColor(2, 0x0f0766);
  CircuitPlayground.setPixelColor(3, 0x0f0766);
  CircuitPlayground.setPixelColor(4, 0x0f0766);
  CircuitPlayground.setPixelColor(5, 0x0f0766);
  CircuitPlayground.setPixelColor(6, 0x0f0766);
  CircuitPlayground.setPixelColor(7, 0x0f0766);
  CircuitPlayground.setPixelColor(8, 0x0f0766);
  CircuitPlayground.setPixelColor(9, 0x0f0766);
    }
  

  delay(100);
}

Credits

MrPeanutcrackerful

4 projects • 0 followers

The Cool Coaster

Story

Code

Coaster_Temp

Credits

MrPeanutcrackerful

Comments

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The Cool Coaster

The Cool Coaster

Story

Code

Coaster_Temp

Credits

MrPeanutcrackerful

Comments

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