how to make PULSE OXIMETER using ARDUINO

Hello friends, this is chirukesh, I am a youtuber, this is an Pulse Oximeter which measures Oxygen Saturation on blood aslo measures HeartBeat rate just using your finger. At this CORONA pandemic pulse Oximeter is very essential to measure heart beat and oxygen level, just follow simple steps and make your own Pulse oximeter.

✓MATERIALS REQUIRED:-

1. ARDUINO NANO

2. MAX30100 PULSE SENSOR

3. SSD1306 DISPLAY

4. WIRES

5. BREAD BOARD

6. RESISTER (BELOW 10K OR ABOVE 3K)

👉Click here - CIRCUIT DIAGRAM

#include <Wire.h> #include "MAX30100_PulseOximeter.h" #include <Adafruit_GFX.h> #include <Adafruit_SSD1306.h>/ #define ENABLE_MAX30100 1 #define SCREEN_WIDTH 128 // OLED display width, in pixels #define SCREEN_HEIGHT 32 // OLED display height, in pixels // Declaration for an SSD1306 display connected to I2C (SDA, SCL pins) // The pins for I2C are defined by the Wire-library. // On an arduino UNO: A4(SDA), A5(SCL) // On an arduino MEGA 2560: 20(SDA), 21(SCL) // On an arduino LEONARDO: 2(SDA), 3(SCL), ... #define OLED_RESET 4 // 4 // Reset pin # (or -1 if sharing Arduino reset pin) #define SCREEN_ADDRESS 0x3C///< See datasheet for Address; 0x3D for 128x64, 0x3C for 128x32 Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET); #if ENABLE_MAX30100 #define REPORTING_PERIOD_MS 5000 // PulseOximeter is the higher level interface to the sensor // it offers: // * beat detection reporting // * heart rate calculation // * SpO2 (oxidation level) calculation PulseOximeter pox; #endif uint32_t tsLastReport = 0; int xPos = 0; // Callback (registered below) fired when a pulse is detected void onBeatDetected() { Serial.println("Beat!"); heart_beat(&xPos); } void setup() { Serial.begin(115200); Serial.println("SSD1306 128x64 OLED TEST"); // SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally if (!display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS)) { Serial.println(F("SSD1306 allocation failed")); for (;;); // Don't proceed, loop forever } // Show initial display buffer contents on the screen -- // the library initializes this with an Adafruit splash screen. //display.display(); display.clearDisplay(); display.setTextSize(1); display.setTextColor(WHITE); display.setCursor(20, 18); // Display static text display.print("Pulse OxiMeter"); int temp1 = 0; int temp2 = 40; int temp3 = 80; heart_beat(&temp1); heart_beat(&temp2); heart_beat(&temp3); xPos = 0; display.display(); delay(2000); // Pause for 2 seconds display.cp437(true); display.clearDisplay(); Serial.print("Initializing pulse oximeter.."); #if ENABLE_MAX30100 // Initialize the PulseOximeter instance // Failures are generally due to an improper I2C wiring, missing power supply // or wrong target chip if (!pox.begin()) { Serial.println("FAILED"); for (;;); } else { Serial.println("SUCCESS"); } // The default current for the IR LED is 50mA and it could be changed // by uncommenting the following line. Check MAX30100_Registers.h for all the // available options. pox.setIRLedCurrent(MAX30100_LED_CURR_7_6MA); // Register a callback for the beat detection pox.setOnBeatDetectedCallback(onBeatDetected); display_data(0, 0); #endif } void loop() { #if ENABLE_MAX30100 // Make sure to call update as fast as possible pox.update(); int HEART= 0; int OXYGEN = 0; // Asynchronously dump heart rate and oxidation levels to the serial // For both, a value of 0 means "invalid" if (millis() - tsLastReport > REPORTING_PERIOD_MS) { //Serial.print("Heart rate:"); HEART = pox.getHeartRate(); OXYGEN = pox.getSpO2(); Serial.println(HEART); //Serial.print("bpm / SpO2:"); Serial.println(OXYGEN); //Serial.println("%"); tsLastReport = millis(); display_data(HEART,OXYGEN); } #endif drawLine(&xPos); } void display_data(int HEART, int OXYGEN) { display.fillRect(0, 18, 127, 15, BLACK); //if(bpm ==0 && spo2==0){ // display.setTextSize(1); // display.setTextColor(WHITE); //display.setCursor(0, 18); // Display static text // display.print("Fingure Out"); //} display.fillRect(0, 18, 127, 15, BLACK); display.setTextSize(1); display.setTextColor(WHITE); display.setCursor(0, 18); // Display static text display.print("HEART"); display.setTextSize(2); display.print(HEART); display.display(); display.setTextSize(1); display.setTextColor(WHITE); display.setCursor(64, 18); // Display static text display.print("OXYGEN"); display.setTextSize(2); display.println(OXYGEN); display.display(); } void drawLine(int *x_pos) { // Draw a single pixel in white display.drawPixel(*x_pos, 8, WHITE); display.drawPixel((*x_pos)++, 8, WHITE); display.drawPixel((*x_pos)++, 8, WHITE); display.drawPixel((*x_pos)++, 8, WHITE); display.drawPixel((*x_pos), 8, BLACK); // ----- //Serial.println(*x_pos); display.fillRect(*x_pos, 0, 31, 16, BLACK); display.display(); //delay(1); if (*x_pos >= SCREEN_WIDTH) { *x_pos = 0; } } void heart_beat(int *x_pos) { /************************************************/ //display.clearDisplay(); display.fillRect(*x_pos, 0, 30, 15, BLACK); // Draw a single pixel in white display.drawPixel(*x_pos + 0, 8, WHITE); display.drawPixel(*x_pos + 1, 8, WHITE); display.drawPixel(*x_pos + 2, 8, WHITE); display.drawPixel(*x_pos + 3, 8, WHITE); display.drawPixel(*x_pos + 4, 8, BLACK); // ----- //display.display(); //delay(1); display.drawPixel(*x_pos + 5, 7, WHITE); display.drawPixel(*x_pos + 6, 6, WHITE); display.drawPixel(*x_pos + 7, 7, WHITE); // .~. //display.display(); //delay(1); display.drawPixel(*x_pos + 8, 8, WHITE); display.drawPixel(*x_pos + 9, 8, WHITE); // -- //display.display(); //delay(1); /******************************************/ display.drawPixel(*x_pos + 10, 8, WHITE); display.drawPixel(*x_pos + 10, 9, WHITE); display.drawPixel(*x_pos + 11, 10, WHITE); display.drawPixel(*x_pos + 11, 11, WHITE); //display.display(); //delay(1); /******************************************/ display.drawPixel(*x_pos + 12, 10, WHITE); display.drawPixel(*x_pos + 12, 9, WHITE); display.drawPixel(*x_pos + 12, 8, WHITE); display.drawPixel(*x_pos + 12, 7, WHITE); //display.display(); //delay(1); display.drawPixel(*x_pos + 13, 6, WHITE); display.drawPixel(*x_pos + 13, 5, WHITE); display.drawPixel(*x_pos + 13, 4, WHITE); display.drawPixel(*x_pos + 13, 3, WHITE); //display.display(); //delay(1); display.drawPixel(*x_pos + 14, 2, WHITE); display.drawPixel(*x_pos + 14, 1, WHITE); display.drawPixel(*x_pos + 14, 0, WHITE); display.drawPixel(*x_pos + 14, 0, WHITE); //display.display(); //delay(1); /******************************************/ display.drawPixel(*x_pos + 15, 0, WHITE); display.drawPixel(*x_pos + 15, 1, WHITE); display.drawPixel(*x_pos + 15, 2, WHITE); display.drawPixel(*x_pos + 15, 3, WHITE); //display.display(); //delay(1); display.drawPixel(*x_pos + 15, 4, WHITE); display.drawPixel(*x_pos + 15, 5, WHITE); display.drawPixel(*x_pos + 16, 6, WHITE); display.drawPixel(*x_pos + 16, 7, WHITE); //display.display(); //delay(1); display.drawPixel(*x_pos + 16, 8, WHITE); display.drawPixel(*x_pos + 16, 9, WHITE); display.drawPixel(*x_pos + 16, 10, WHITE); display.drawPixel(*x_pos + 16, 11, WHITE); //display.display(); //delay(1); display.drawPixel(*x_pos + 17, 12, WHITE); display.drawPixel(*x_pos + 17, 13, WHITE); display.drawPixel(*x_pos + 17, 14, WHITE); display.drawPixel(*x_pos + 17, 15, WHITE); //display.display(); //delay(1); display.drawPixel(*x_pos + 18, 15, WHITE); display.drawPixel(*x_pos + 18, 14, WHITE); display.drawPixel(*x_pos + 18, 13, WHITE); display.drawPixel(*x_pos + 18, 12, WHITE); //display.display(); //delay(1); display.drawPixel(*x_pos + 19, 11, WHITE); display.drawPixel(*x_pos + 19, 10, WHITE); display.drawPixel(*x_pos + 19, 9, WHITE); display.drawPixel(*x_pos + 19, 8, WHITE); //display.display(); //delay(1); /****************************************************/ display.drawPixel(*x_pos + 20, 8, WHITE); display.drawPixel(*x_pos + 21, 8, WHITE); //display.display(); //delay(1); /****************************************************/ display.drawPixel(*x_pos + 22, 7, WHITE); display.drawPixel(*x_pos + 23, 6, WHITE); display.drawPixel(*x_pos + 24, 6, WHITE); display.drawPixel(*x_pos + 25, 7, WHITE); //display.display(); //delay(1); /************************************************/ display.drawPixel(*x_pos + 26, 8, WHITE); display.drawPixel(*x_pos + 27, 8, WHITE); display.drawPixel(*x_pos + 28, 8, WHITE); display.drawPixel(*x_pos + 29, 8, WHITE); display.drawPixel(*x_pos + 30, 8, WHITE); // ----- *x_pos = *x_pos + 30; display.display(); delay(1); }