KY-039 5V Finger Detection Heartbeat sensor price in bd Module Detector For Arduino
Product Description: Heartbeat sensor price in bd
Specification: Heartbeat sensor price in bd
KY-039 Finger Detection Heartbeat Sensor is a Low cost Heart beat Sensing Module. This Heart beat detection module uses bright infrared (ir) led and a photo-transistor to detect the pulse of the finger, a red led flashes with each pulse.
- Pulse monitor works as follows: the led is Turned ON on one side of the finger, and photo-transistor is on the other side of the finger.
- The photo-transistor used to obtain the flux emitted, when the blood flows through the finger then the resistance of the photo-transistor will be vary slightly.
- The most important is to keep the shield stray light into the photo-transistor. For home lighting that is particularly important because the lights at home mostly based 50hz or 60hz fluctuate, so faint heartbeat will add considerable noise.
- Use IR LED and an optical transistor to detect pulsation in fingers
- Small and Compact module
- Easy to use.
Connecting Heart Beat Module to Arduino: Heartbeat sensor price in bd
1. Sensor pin S connect to Arduino pin Analog 0 / A0
2. Sensor pin + (middle pin) connect to Arduino pin 5+
3. Sensor pin – connect to Arduino pin GND
Example Code: Heartbeat sensor price in bd
// Pulse Monitor Test Script
int sensorPin = 0;
double alpha = 0.75;
int period = 100;
double change = 0.0;
double minval = 0.0;
void setup ()
void loop ()
static double oldValue = 0;
static double oldChange = 0;
int rawValue = analogRead (sensorPin);
double value = alpha * oldValue + (1 – alpha) * rawValue;
oldValue = value;
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