In this video I'll be showing you how you can control the contrast and the back light brightness of a 1602 LCD display with just the Arduino. The contrast is typically adjusted with a variable ...
3 pins are required to interface (two I2C and one reset). Adafruit invests time and resources providing this open source code, please support Adafruit and open-source #define SCREEN_WIDTH 128 // OLED ...
volatile boolean Pulse = false; // "True" when User's live heartbeat is detected. "False" when not a "live beat". volatile boolean QS = false; // becomes true when Arduoino finds a beat. static ...