Instructions

IDUINO for maker’s life
56 www.openplatform.cc
finger, a red LED flashes with each pulse. Pulse monitor works as follows: The LED is the
light side of the finger, and phototransistor on the other side of the finger, phototransistor
used to obtain the flux emitted, when the blood pressure pulse by the finger when the
resistance of the photo transistor will be slightly changed.
Specification
 Operation voltage: 5V
 3 pin
 Size: 30*18mm
 Weight: 2g
2 Pinout
Pin
Description
A0
Analog output pin, real-time output voltage
signal
+(middle pin)
Power
-
Ground
3.example
In this example, put your finger between the IR LED and the phototransistor, then open the
Serial Monitor, you will see the voltage value changing. With one camera in the dark, you
can see the IR LED is blinding.
********Code Begin********
int sensorPin = 0;