How to Make LED Face Mask

Let people know when you are talking.

Jul 27, 2020

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14801 views

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5 respects

Components and supplies

330Ω resistor

24 Gauge wire

Microphone MAX4466

KCD1 Switch

Arduino Nano R3

Led matrix 8x8 WS2812B

Tools and machines

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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