Up Close With a US $10 Bill

Comments

Post a Comment

Popular posts from this blog

ESP32 Based Pulse-Oximeter using MAX30102

Image
Code for Arduino IDE used in the video is listed below. It targets the Wemos D1 R32 ESP32 board, but can be modified to suit. // Tinker Foundry // Accompanying video: https://youtu.be/xjwSKy6jzTI // Code for ESP32 to interface with MAX30102 breakout board and report blood oxygen level // Refer to https://github.com/DKARDU/bloodoxygen - below code is simplified version // https://www.analog.com/media/en/technical-documentation/data-sheets/MAX30102.pdf // Connections from WEMOS D1 R32 board to MAX30102 Breakout Board as follows: //  SCL (ESP32) to SCL (breakout board) //  SDA (ESP32) to SDA (breakout board) //  3V3 (ESP32) to VIN (breakout board) //  GND (ESP32) to GND (breakout board) #include <Wire.h> #include "MAX30105.h" //sparkfun MAX3010X library MAX30105 particleSensor; double avered    = 0 ; double aveir     = 0 ; double sumirrms  = 0 ; double sumredrms = 0 ; int    i         = 0 ; int    Num       = 100 ;  // calculate SpO2 by this sampling interval int
Read more

ESP32 Web Sockets - Transferring Image Raw Data

Image
Code listings... For the ESP32 C-code, please start off with a sketch from any existing example for ESP32 CAM and use that as your starting point... it will include app_httpd.cpp and camera_pins.h files. CameraWebSocket.ino // refer to https://shawnhymel.com/1675/arduino-websocket-server-using-an-esp32/ // To make sure WebSocketServer.h is available: //    Sketch > Include Library > Manage Libraries //    Search for "WebSockets Sattler' and install the library named "WebSockets by Markus Sattler" // // WARNING!!! PSRAM IC required for UXGA resolution and high JPEG quality //            Ensure ESP32 Wrover Module or other board with PSRAM is selected //            Partial images will be transmitted if image exceeds buffer size // #include "esp_camera.h" #include <WiFi.h> #include <WebSocketsServer.h> // Select camera model #define CAMERA_MODEL_WROVER_KIT // Has PSRAM #include "camera_pins.h" // This must come after camera m
Read more

Heart Rate Measurement with ESP32 and Pulse Oximeter Module using FFT

Image
 Code listing used in video: // Tinker Foundry // Heart Rate Measurement with the MAX30102 breakout board using FFT // Connections from WEMOS D1 R32 board to MAX30102 Breakout Board as follows: //  SCL (ESP32) to SCL (breakout board) //  SDA (ESP32) to SDA (breakout board) //  3V3 (ESP32) to VIN (breakout board) //  GND (ESP32) to GND (breakout board) #include <Wire.h> #include "MAX30105.h"     // sparkfun MAX3010X library MAX30105 particleSensor; #include "arduinoFFT.h" arduinoFFT FFT; double avered       = 0 ; double aveir        = 0 ; double sumirrms     = 0 ; double sumredrms    = 0 ; int    i            = 0 ; int    Num          = 100 ;  // calculate SpO2 by this sampling interval int    Temperature; int    temp; float  ESpO2;               // initial value of estimated SpO2 double FSpO2        = 0.7 ;  // filter factor for estimated SpO2 double frate        = 0.95 ; // low pass filter for IR/red LED value to eliminate AC component #def
Read more