Hardware Overview
Ky-039 is a cheap Heartbeat Sensing Module. This Heartbeat module contains bright infrared (IR) led and a photo-transistor that helps to detect the pulse of the hum finger, There is a red LED present in the module that flashes at each pulse. The lead gets turned ON on one side of the finger, and the photo-transistor is on the other side of the finger.
Working of Sensor
These sensor modules can work to detect the heart rate of an individual. It achieves this by an IR emitting LED on one side of a fingertip and by detecting minor changes in the received IR using a phototransistor. The blood being pumped through the finger causes fluctuations in the transmitted IR. A program that runs on the microcontroller cleans out the electrical noise, reads the data, and provides the heart rate.
Features and Specifications
Features
- Easy to use
- Use IR LED and an optical transistor to detect pulsation in fingers
- Small and Compact module
- M2 Mounting holes (centers 10mm apart)
- Designed to be compatible with standard 2.54mm sockets
Specifications
- Ky-039 is a Low-cost Heartbeat Sensing Module. This Heartbeat 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.
- The pulse monitor works as follows: the led is Turned ON on one side of the finger, and the photo-transistor is on the other side of the finger.
- The photo-transistor is used to obtain the flux emitted, when the blood flows through the finger then the resistance of the photo-transistor will vary slightly.
- The most important is to keep the shield of stray light in the photo-transistor. For home lighting that is particularly important because the lights at home are mostly based on 50hz or 60hz fluctuate, so a faint heartbeat will add considerable noise.
- Dimensions: 32 x 24 x 12mm
- Weight: 3.06g
- Material: FR4
Pinouts
| Pin Name | Description |
| S | Signal pin. |
| VCC | Power Supply Input |
| GND | Power supply ground |
Applications
The module has applications in the medical industry.
Detection of Pulse wave
We can detect pulse waves by measuring the change in volume using a heartbeat sensor and green LED.
Heart Rate Monitor
A heart rate monitor is a useful tool for athletes or people who work on their fitness because it favors a person to manage the intensity of an exercise or workout.
