Final Project - Aincrad

Aincrad is an interactive piece of furniture which is able to recognize the clapping sound to illuminate it's rgb-lighting system in the dark.

I have designed Aincrad body on Fusion 360, the top, middle and holders are 3D printing. the Base is a composites with the addition of phosphoric color to make it glow in the dark. the five swords are made out of acrylic using the laser cutter.
For the electronics I use an ATtiny44 with MEMS Mic to detect the sound of clapping hands or snapping fingers then send a signal to the RGB-leds to control the lighting of Aincrad top part.
each sword has a blue led and One of the main goals was to have a design as integrated as possible so all of the electronics and wiring are hidden inside the middle part of Aincrad.

This page is just the result of a lot of work done for several months. hope you enjoy it as I did!

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What does it do?

Aincrad is an interactive piece of furniture which is able to recognize the clapping sound to illuminate it's rgb-lighting system in the dark.

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Who's done what beforehand?

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What did you design?

I have designed from scratch all of Aincrad parts, from the body parts to the electronic boards.

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What materials and components were used and where did they come from?

How much did they cost?

#	Components	Amount	Unit price	Total cost	Where to buy?	Notes
1	Atmega328p-au	1	$2.87	$2.87	Digikey	Datasheet
2	16MHz crystal	1	5EGP	5EGP	Alamir local store
3	22pf ceramic capacitor	2	3EGP	6EGP	Alamir local store
4	10uf ceramic capacitor	2	$0.1213	$0.2426	Digikey
5	10 kohm resistor	1	$0.01306	$0.01306	Digikey
6	499ohm resistor	4	$0.0291	$0.1164	Digikey
7	green led	1	$0.15	$0.15	Digikey
8	2×2 pinheader	1	$0.71	$0.71	Digikey
9	1×3 pinheader	1	$0.23	$0.23	Digikey
10	2×3 pinheader for ISP	1	$0.65	$0.65	Digikey
11	1×6 pinheader for FTDI	1	$0.47	$0.47	Digikey
12	Mic MEMS analog SPU0414HR5H-SB	1	$1.14	$1.14	Digikey	Datasheet
13	0.1uf ceramic capacitor	2	$0.1662	$0.3324	Digikey
14	LM3480- 3.3V	1	$0.6644	$0.6644	Digikey	Datasheet
15	1kohm resistor	10	$0.0291	$0.291	Digikey
16	RGB led	3	$0.53	$1.59	Digikey	Datasheet
17	N-Mosfet transistor	3	$0.2083	$0.4166	Digikey

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What parts and systems were made?

Castle body and base

Electronics.

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What processes were used?

For the design of Aincrad body I've used Fusion 360 ,3D printing and composite technique. For the swords I've used illustrator and laser cutter.
for electronic boards I used kicad and the milling and soldering process using both machine CNC and vinyl cutter. For the programming of the microcontrollers I used Arduino-IDE and Linux.

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What questions were answered

how to fit all the castle structure together and all the elctronics components inside the structure in an integrated way as much as possible.

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What worked? What didn't?

• At the beginning I've designed a one board using Atmega328 to be the single board (input-output) of Aincrad, however due to the time I end up use networking to communicate between the soundsensor board and the rgb-control board.
• The multi-color version of rgb-board didn't give the effect I was hopping for due to the two leds being really close to each others.
• At the beginning when I was creating the base I've used a 3D printing mold box instead of silicon and the result wasn't good at all.

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Laser cutting

I have made the swords out of acrylic using the laser cutter.

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Molding and casting

At wildcard week I have created a composite of the base with the use of medical bandage and phosphoric colors.

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Electronics design and production

The electronics part is consit of 4 main components:

Sound sensor: Aincrad input circuit that detect the clapping or finger snapping sound.

RGB - control: Aincrad output that lighting the castle body based on the sound sensor signal.

Led Sword interface: Simple circuit of a led&resistor to light each sword.

Integration hexagon: the integrated circuit that provid the power for all of my boards.

Input Circuit - Sound Sensor

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Output Circuit - RGB-control

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Swords interface circuit and Integration Hexagon on Vinyl cutter

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Embedded Microcontroller interfacing and programming

#include < SoftwareSerial.h >
#define redLed 8
#define blueLed 7
#define greenLed 6
#define swordsLed 3
#define TX 0
#define RX 1
#define triggerValue 75
SoftwareSerial mySerial(RX,TX);
byte color=0;

void setup() {
  mySerial.begin(9600);
  pinMode(redLed,OUTPUT);
  pinMode(blueLed,OUTPUT);
  pinMode(greenLed,OUTPUT);
  digitalWrite(redLed,HIGH);
  digitalWrite(blueLed,HIGH);
  digitalWrite(greenLed,HIGH);
}

void loop() {
  byte sensorValue;
  if (mySerial.available()){
    sensorValue= mySerial.parseInt();
  }
  else {
    sensorValue =0;
  }
  if (sensorValue >= triggerValue){
    rgbControl();
  }
}

void rgbControl (){
  digitalWrite (swordsLed,HIGH);
  switch (color){
    case 0:     //blue color
    analogWrite(redLed,220);
    analogWrite(blueLed,100);
    analogWrite(greenLed,255);
    color++;
    break;
    case 1:   //red color
    analogWrite(redLed,100);
    analogWrite(blueLed,255);
    analogWrite(greenLed,255);
    color++;
    break;
    case 2:   //green color
    analogWrite(redLed,255);
    analogWrite(blueLed,255);
    analogWrite(greenLed,100);
    color++;
    break;
    case 3:   //yellow color
    analogWrite(redLed,70);
    analogWrite(blueLed,250);
    analogWrite(greenLed,150);
    color++;
    break;
    case 4:   //Turn off
    digitalWrite(redLed,HIGH);
    digitalWrite(blueLed,HIGH);
    digitalWrite(greenLed,HIGH);
    color=0;
    digitalWrite (swordsLed,LOW);
    break;
  }
} 

#include < SoftwareSerial.h >
#define TX 0
#define RX 1
#define soundSensor 2
SoftwareSerial mySerial(RX,TX);

const char sampleTime =50;
byte micOut;
boolean state = true;

void setup() {
  mySerial.begin(9600);
}

void loop(){
   unsigned int micOutput = findPTPAmp();
   mySerial.println(micOutput);
}

int findPTPAmp(){
// Time variables to find the peak-to-peak amplitude
   unsigned long startTime= millis();  // Start of sample window
   unsigned int PTPAmp = 0; 

// Signal variables to find the peak-to-peak amplitude
   unsigned int maxAmp = 0;
   unsigned int minAmp = 1023;

// Find the max and min of the mic output within the 50 ms timeframe
   while(millis() - startTime < sampleTime) 
   {
      micOut = analogRead(soundSensor);
        if( micOut < 1023) //prevent erroneous readings
        {
          if (micOut > maxAmp)
          {
            maxAmp = micOut; //save only the max reading
          }
          else if (micOut < minAmp)
          {
            minAmp = micOut; //save only the min reading
         }
       }
    }
 
PTPAmp = maxAmp - minAmp; // (max amp) - (min amp) = peak-to-peak amplitude
//double micOut_Volts = (PTPAmp * 3.3) / 1024; // Convert ADC into voltage
//Return the PTP amplitude. 
return PTPAmp;   
}

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Networking

I have to connect the Tx of the soundsensor with the Rx of the RGB board to use the signal of the Sound sensor to control the RGB leds.

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System integration

It was really important to me to make a clean integration that hide all of the components and wiring.