Published April 15, 2017

PrankChair: The Best April Fool's Prank!

PrankChair is a chair which looks normal but is too abnormal! ;)

AdvancedFull instructions provided2,620

Judges' Favorites

circuito.io's Arduino Day Prank Contest

PrankChair: The Best April Fool's Prank!

Things used in this project

Hardware components

Arduino Mega 2560

HC-05 Bluetooth Module

USB-A to B Cable

Lithium Polymer Battery

Force Sensitive Resistor 0.5"

3.3K Ohm Resistor

Jumper wires (generic)

Male/Female Jumper Wires

Software apps and online services

circuito.io

My PrankChair App

Story

Aim: To prank people and win the circuito.io's Arduino Day Prank Contest!

How it Works:

A person sits on the chair.

The pressure sensor attached in the chair sends some values to the PrankChair app via Bluetooth.

The app which is active in the smartphone fixed beneath the chair produces a FART sound and the person thinks that he just farted due to the vibrations caused in the chair. That's honestly pretty funny! ;)

Thanks: Thanks for providing such a wonderful opportunity for hobbyists like me to showcase our cool ideas. And this also made me discover this wonderful website circuito.io which is just awesome because you don't need to go all over Google to look fort the schematics because this gives them just by entering the components, which is pretty cool and different!

Pressure sensor: The pressure sensor I used in this project is a DIY one and you can make one too just by watching the videos I've provided.

Happy April Fool's Day & a very Happy Arduino 😊🤘👍

How it's Made:

Step 1: Get a chair.

Step 2: Get all the stuff.

Step 3: Wire it up!

Step 4: Fix everything & check that's working!

TOP: Arduino Mega

BOTTOM: Power supply

RIGHT: HC-05 Bluetooth module

LEFT: Smartphone stand

BLUE COLOUR CABLE: A to B Cable

Others: Jumper wires and tape

Link to circuito.io: PrankChair

Code

// Pin Definitions
// Global variables and defines
const int analogInPin = A0;  
const int analogOutPin = 9; 
int sensorValue = 0;        
int outputValue = 0;        

/* This code sets up the essentials for your circuit to work. It runs first every time your circuit is powered with electricity. */
void setup() {
  // Setup Serial which is useful for debugging
    // Use the Serial Monitor to view printed messages
  Serial.begin(9600);
}

/* This code is the main logic of your circuit. It defines the interaction between the components you selected. After setup, it runs over and over again, in an eternal loop. */
void loop() {
  sensorValue = analogRead(analogInPin);            
  outputValue = map(sensorValue, 0, 1023, 0, 255);  
  analogWrite(analogOutPin, outputValue);          
  Serial.print(" " );                     
  delay(1000);  
    
if (sensorValue > 10)
{
  Serial.print("1" );                     
  // action A
}
else if

(sensorValue < 10)
{
  Serial.print("L" );                     
  // action B
}

}