How to Make LED Face Mask

Let people know when you are talking.

Jul 27, 2020

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Devices & Components

Arduino Nano

330Ω resistor

24 Gauge wire

Microphone MAX4466

KCD1 Switch

Led matrix 8x8 WS2812B

Hardware & Tools

5V power bank

Heat shrink

Project description

Code

mask.ino

arduino

1#include <Adafruit_NeoPixel.h>
2#include <Adafruit_NeoMatrix.h>
3#include  <gamma.h>
4
5#define lengthof(A) ((sizeof((A))/sizeof((A)[0])))
6#define button  12
7int oldstate=HIGH;
8
9
10const PROGMEM uint8_t mouth_0[8][8] = {
11    {0,0,0,0,0,0,0,0},
12    {0,0,0,0,0,0,0,0},
13    {0,0,6,6,6,6,0,0}, 
14    {0,6,6,6,6,6,6,0},
15    {6,6,0,0,0,0,6,6},
16    {6,0,0,0,0,0,0,6},
17    {0,0,0,0,0,0,0,0},
18    {0,0,0,0,0,0,0,0}
19};
20
21const PROGMEM uint8_t mouth_4[8][8] = {
22    {0,0,7,7,7,7,0,0},
23    {0,7,0,0,0,0,7,0},
24    {7,0,0,0,0,0,0,7},
25    {7,0,0,0,0,0,0,7},
26    {7,0,0,0,0,0,0,7},
27    {7,0,0,0,0,0,0,7},
28    {0,7,0,0,0,0,7,0},
29    {0,0,7,7,7,7,0,0}
30};
31
32const  PROGMEM uint8_t mouth_3[8][8] = {
33    {0,0,0,0,0,0,0,0},
34    {0,0,7,7,7,7,0,0},
35    {0,7,0,0,0,0,7,0},
36    {7,0,0,0,0,0,0,7},
37    {7,0,0,0,0,0,0,7},
38    {0,7,0,0,0,0,7,0},
39    {0,0,7,7,7,7,0,0},
40    {0,0,0,0,0,0,0,0}
41};
42
43const PROGMEM uint8_t  mouth_2[8][8] = {
44    {0,0,0,0,0,0,0,0},
45    {0,0,0,0,0,0,0,0},
46    {0,7,7,7,7,7,7,0},
47    {7,0,0,0,0,0,0,7},
48    {7,0,0,0,0,0,0,7},
49    {0,7,7,7,7,7,7,0},
50    {0,0,0,0,0,0,0,0},
51    {0,0,0,0,0,0,0,0}
52};
53
54const PROGMEM uint8_t mouth_1[8][8] = {
55    {0,0,0,0,0,0,0,0},
56    {0,0,0,0,0,0,0,0},
57    {0,0,0,7,7,0,0,0},
58    {7,7,7,0,0,7,7,7},
59    {7,7,7,0,0,7,7,7},
60    {0,0,0,7,7,0,0,0},
61    {0,0,0,0,0,0,0,0},
62    {0,0,0,0,0,0,0,0}
63};
64
65const  PROGMEM uint8_t mouth_smile[8][8] = {
66    {0,0,0,0,0,0,0,0},
67    {0,0,0,0,0,0,0,0},
68    {2,0,0,0,0,0,0,2},
69    {2,2,0,0,0,0,2,2},
70    {0,2,2,2,2,2,2,0},
71    {0,0,2,2,2,2,0,0},
72    {0,0,0,0,0,0,0,0},
73    {0,0,0,0,0,0,0,0}
74};
75
76const PROGMEM uint8_t  off_set[8][8] = {
77    {0,0,0,0,0,0,0,0},
78    {0,0,0,0,0,0,0,0},
79    {0,0,0,0,0,0,0,0},
80    {0,0,0,0,0,0,0,0},
81    {0,0,0,0,0,0,0,0},
82    {0,0,0,0,0,0,0,0},
83    {0,0,0,0,0,0,0,0},
84    {0,0,0,0,0,0,0,0}
85};
86
87
88
89uint16_t palette[8] = {};
90Adafruit_NeoMatrix  matrix1 = Adafruit_NeoMatrix(8, 8, 6,
91  NEO_MATRIX_BOTTOM     + NEO_MATRIX_RIGHT  +
92  NEO_MATRIX_ROWS    + NEO_MATRIX_ZIGZAG,
93  NEO_GRB            + NEO_KHZ800);
94Adafruit_NeoMatrix  matrix2 = Adafruit_NeoMatrix(8, 8, 7,
95  NEO_MATRIX_BOTTOM     + NEO_MATRIX_RIGHT  +
96  NEO_MATRIX_ROWS    + NEO_MATRIX_ZIGZAG,
97  NEO_GRB            + NEO_KHZ800);
98
99Adafruit_NeoMatrix  matrix3 = Adafruit_NeoMatrix(8, 8, 2,
100  NEO_MATRIX_BOTTOM     + NEO_MATRIX_RIGHT  +
101  NEO_MATRIX_ROWS    + NEO_MATRIX_ZIGZAG,
102  NEO_GRB            + NEO_KHZ800);  
103Adafruit_NeoMatrix matrix4 = Adafruit_NeoMatrix(8, 8, 0,
104  NEO_MATRIX_BOTTOM     + NEO_MATRIX_RIGHT +
105  NEO_MATRIX_ROWS    + NEO_MATRIX_ZIGZAG,
106  NEO_GRB            + NEO_KHZ800); 
107  
108
109void drawImage(short image_addr){
110    for(int  x = 0; x<8; x++){
111        for(int y = 0; y<8; y++){
112            uint8_t index  = pgm_read_byte(image_addr+x+y*8);
113            matrix1.drawPixel(x, y, palette[index]);  
114            matrix2.drawPixel(x, y, palette[index]); 
115            matrix3.drawPixel(x,  y, palette[index]);  
116            matrix4.drawPixel(x, y, palette[index]);
117        }
118    }
119
120    matrix1.show();
121    matrix2.show();
122    matrix3.show();
123    matrix4.show();
124}
125
126
127int pop_detection = 0;
128bool smiling = false;
129unsigned  long smiletimer = 0;
130unsigned long last_face = 0;
131float vol = 0;
132const  uint16_t samples = 128;
133
134void setup() {
135
136    Serial.begin(9600);
137    matrix1.begin();
138    matrix2.begin();
139    matrix3.begin();
140    matrix4.begin();
141
142    palette[0] = matrix4.Color(0,0,0);        //No color
143 // palette[1] = matrix.Color(0,0,255);       //blue
144    palette[2] = matrix3.Color(255,0,255);    //purple
145 // palette[3]  = matrix.Color(0,255,0);       //green
146 // palette[4] = matrix.Color(255,255,255);   //white
147 // palette[5] = matrix.Color(255,0,0);       //red
148    palette[6]  = matrix1.Color(0,255,255);    //yellow 
149    palette[7] = matrix2.Color(255,255,0);    //cyan
150    
151   
152   pinMode(button,INPUT_PULLUP);
153}
154
155
156void  loop() {
157    
158    int newstate=digitalRead(button);
159      if(newstate ==  LOW){
160        
161    float nvol = 0;
162    int previous_peak = -1;
163    
164    for (int i = 0; i<samples; i++){
165        auto analog = analogRead(A7);
166        auto micline = abs(analog - 512);
167
168        nvol = max(micline, nvol);
169    }
170
171    vol = (nvol + 1.0*vol)/2.0;
172
173    if(nvol > 200){
174        pop_detection  += 1;
175        if(pop_detection > 5) {
176            smiling = false;
177            last_face  = millis();
178        }
179    } else {
180        if(pop_detection > 0 && pop_detection  <= 5) {
181            if(millis() > last_face + 500){
182                smiling  = true;
183                smiletimer = millis() + 2000;
184            }
185        }
186        pop_detection = 0;
187    }
188    if(millis() > smiletimer) 
189    smiling  = false;
190
191   
192      if(smiling){
193        drawImage(mouth_smile);
194    } else if(vol < 200){
195        drawImage(mouth_0);
196    } else if(vol <  250 && vol > 200){
197        drawImage(mouth_1); 
198    } else if(vol < 350 &&  vol > 250){
199        drawImage(mouth_2);
200    } else if(vol < 450 && vol > 350){
201        drawImage(mouth_3);
202    } else {
203        drawImage(mouth_4);
204        }
205       
206      }
207      else
208      {
209        drawImage(off_set);
210      }
211      
212}
213    
214   
215    
216    
217        
218  
219    
220    
221
222    
223  
224
225    
226
227    
228    
229

#include <Adafruit_NeoPixel.h>
#include <Adafruit_NeoMatrix.h>
#include  <gamma.h>

#define lengthof(A) ((sizeof((A))/sizeof((A)[0])))
#define button  12
int oldstate=HIGH;


const PROGMEM uint8_t mouth_0[8][8] = {
    {0,0,0,0,0,0,0,0},
    {0,0,0,0,0,0,0,0},
    {0,0,6,6,6,6,0,0}, 
    {0,6,6,6,6,6,6,0},
    {6,6,0,0,0,0,6,6},
    {6,0,0,0,0,0,0,6},
    {0,0,0,0,0,0,0,0},
    {0,0,0,0,0,0,0,0}
};

const PROGMEM uint8_t mouth_4[8][8] = {
    {0,0,7,7,7,7,0,0},
    {0,7,0,0,0,0,7,0},
    {7,0,0,0,0,0,0,7},
    {7,0,0,0,0,0,0,7},
    {7,0,0,0,0,0,0,7},
    {7,0,0,0,0,0,0,7},
    {0,7,0,0,0,0,7,0},
    {0,0,7,7,7,7,0,0}
};

const  PROGMEM uint8_t mouth_3[8][8] = {
    {0,0,0,0,0,0,0,0},
    {0,0,7,7,7,7,0,0},
    {0,7,0,0,0,0,7,0},
    {7,0,0,0,0,0,0,7},
    {7,0,0,0,0,0,0,7},
    {0,7,0,0,0,0,7,0},
    {0,0,7,7,7,7,0,0},
    {0,0,0,0,0,0,0,0}
};

const PROGMEM uint8_t  mouth_2[8][8] = {
    {0,0,0,0,0,0,0,0},
    {0,0,0,0,0,0,0,0},
    {0,7,7,7,7,7,7,0},
    {7,0,0,0,0,0,0,7},
    {7,0,0,0,0,0,0,7},
    {0,7,7,7,7,7,7,0},
    {0,0,0,0,0,0,0,0},
    {0,0,0,0,0,0,0,0}
};

const PROGMEM uint8_t mouth_1[8][8] = {
    {0,0,0,0,0,0,0,0},
    {0,0,0,0,0,0,0,0},
    {0,0,0,7,7,0,0,0},
    {7,7,7,0,0,7,7,7},
    {7,7,7,0,0,7,7,7},
    {0,0,0,7,7,0,0,0},
    {0,0,0,0,0,0,0,0},
    {0,0,0,0,0,0,0,0}
};

const  PROGMEM uint8_t mouth_smile[8][8] = {
    {0,0,0,0,0,0,0,0},
    {0,0,0,0,0,0,0,0},
    {2,0,0,0,0,0,0,2},
    {2,2,0,0,0,0,2,2},
    {0,2,2,2,2,2,2,0},
    {0,0,2,2,2,2,0,0},
    {0,0,0,0,0,0,0,0},
    {0,0,0,0,0,0,0,0}
};

const PROGMEM uint8_t  off_set[8][8] = {
    {0,0,0,0,0,0,0,0},
    {0,0,0,0,0,0,0,0},
    {0,0,0,0,0,0,0,0},
    {0,0,0,0,0,0,0,0},
    {0,0,0,0,0,0,0,0},
    {0,0,0,0,0,0,0,0},
    {0,0,0,0,0,0,0,0},
    {0,0,0,0,0,0,0,0}
};



uint16_t palette[8] = {};
Adafruit_NeoMatrix  matrix1 = Adafruit_NeoMatrix(8, 8, 6,
  NEO_MATRIX_BOTTOM     + NEO_MATRIX_RIGHT  +
  NEO_MATRIX_ROWS    + NEO_MATRIX_ZIGZAG,
  NEO_GRB            + NEO_KHZ800);
Adafruit_NeoMatrix  matrix2 = Adafruit_NeoMatrix(8, 8, 7,
  NEO_MATRIX_BOTTOM     + NEO_MATRIX_RIGHT  +
  NEO_MATRIX_ROWS    + NEO_MATRIX_ZIGZAG,
  NEO_GRB            + NEO_KHZ800);

Adafruit_NeoMatrix  matrix3 = Adafruit_NeoMatrix(8, 8, 2,
  NEO_MATRIX_BOTTOM     + NEO_MATRIX_RIGHT  +
  NEO_MATRIX_ROWS    + NEO_MATRIX_ZIGZAG,
  NEO_GRB            + NEO_KHZ800);  
Adafruit_NeoMatrix matrix4 = Adafruit_NeoMatrix(8, 8, 0,
  NEO_MATRIX_BOTTOM     + NEO_MATRIX_RIGHT +
  NEO_MATRIX_ROWS    + NEO_MATRIX_ZIGZAG,
  NEO_GRB            + NEO_KHZ800); 
  

void drawImage(short image_addr){
    for(int  x = 0; x<8; x++){
        for(int y = 0; y<8; y++){
            uint8_t index  = pgm_read_byte(image_addr+x+y*8);
            matrix1.drawPixel(x, y, palette[index]);  
            matrix2.drawPixel(x, y, palette[index]); 
            matrix3.drawPixel(x,  y, palette[index]);  
            matrix4.drawPixel(x, y, palette[index]);
        }
    }

    matrix1.show();
    matrix2.show();
    matrix3.show();
    matrix4.show();
}


int pop_detection = 0;
bool smiling = false;
unsigned  long smiletimer = 0;
unsigned long last_face = 0;
float vol = 0;
const  uint16_t samples = 128;

void setup() {

    Serial.begin(9600);
    matrix1.begin();
    matrix2.begin();
    matrix3.begin();
    matrix4.begin();

    palette[0] = matrix4.Color(0,0,0);        //No color
 // palette[1] = matrix.Color(0,0,255);       //blue
    palette[2] = matrix3.Color(255,0,255);    //purple
 // palette[3]  = matrix.Color(0,255,0);       //green
 // palette[4] = matrix.Color(255,255,255);   //white
 // palette[5] = matrix.Color(255,0,0);       //red
    palette[6]  = matrix1.Color(0,255,255);    //yellow 
    palette[7] = matrix2.Color(255,255,0);    //cyan
    
   
   pinMode(button,INPUT_PULLUP);
}


void  loop() {
    
    int newstate=digitalRead(button);
      if(newstate ==  LOW){
        
    float nvol = 0;
    int previous_peak = -1;
    
    for (int i = 0; i<samples; i++){
        auto analog = analogRead(A7);
        auto micline = abs(analog - 512);

        nvol = max(micline, nvol);
    }

    vol = (nvol + 1.0*vol)/2.0;

    if(nvol > 200){
        pop_detection  += 1;
        if(pop_detection > 5) {
            smiling = false;
            last_face  = millis();
        }
    } else {
        if(pop_detection > 0 && pop_detection  <= 5) {
            if(millis() > last_face + 500){
                smiling  = true;
                smiletimer = millis() + 2000;
            }
        }
        pop_detection = 0;
    }
    if(millis() > smiletimer) 
    smiling  = false;

   
      if(smiling){
        drawImage(mouth_smile);
    } else if(vol < 200){
        drawImage(mouth_0);
    } else if(vol <  250 && vol > 200){
        drawImage(mouth_1); 
    } else if(vol < 350 &&  vol > 250){
        drawImage(mouth_2);
    } else if(vol < 450 && vol > 350){
        drawImage(mouth_3);
    } else {
        drawImage(mouth_4);
        }
       
      }
      else
      {
        drawImage(off_set);
      }
      
}

Downloadable files

LED Face Mask

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