Arduino Sensor Interfacing (Flex sensor, IR Sensor, PIR ,BMP180, LM35, LM75 Refer below Tutorials for external sensor interfacing with Arduino - Visit for simillar projects at ...

Arduino PIR Motion Sensor Interfacing Circuit Diagram. Connect the PIR sensor's VCC (or +) pin to the Arduino's 5V output. Connect the GND (-) pin of the PIR sensor to any GND pin on the Arduino.

Interface Type: I2C; Working of MAX30100 Pulse Oximeter and Heart-Rate Sensor. The device has two LEDs, one emitting red light, another emitting infrared light. For pulse rate, only infrared light is ...