KY 039 Finger Measuring Heartbeat Sensor Module for Arduino_传感器_类别分类_产品

* Store Home Best Sellers New Arrivals Wholesale Items Gift Section Contact us
Store Categories Industrial Electronics Industrial Automation Robot Parts 3D Printer Series Power Modules LEDs DIY Kits Relay Modules Wireless Modules Sensors PCB Breadboards LCD Modules Voltage Ammeter Motors Series Development Boards Connector&Cable Capacitor&Resistor Equipment & Tools Modules Arduino Series Raspberry Pi Series Hot sale

ATmega2560-16AU Board

$16.99

MAX7219 Dot matrix module

$5.81

25W High Power LED

$3.44

LM317 DIY Kits

$3.55

Jumper wires+MB102830

$5.44

12V 2 Channel Wireless Remote Module

$9.44

New Arrival

3D printer RepRap RAMPS1.4 LCD12864

$27.73

6 DOF Mechanical Arm

$127.95

5cm High Power LED Heat Sink

$3.51

2.4G NRF24L01+ Wireless Transceiver

$5.65

12V 1-Channel Relay Module

$3.40

Rain Detection Module Moisture Sensor

$3.61

Payment info

Similar Products for Recommendation / click here!

$62.31

$4.44

$4.91

$2.50

37 Modules Sensor Kit 37 Sensors for Arduino AVR PIC MQ7 CO Gas Sensor Module MQ-3 Alcohol Ethanol Sensor Slot-type Optocouple ?Module

$2.01

$2.73

$3.41

$3.14

Pyroelectr?ic Infrared PIR Motion Sensor 10MM RGB LED Module Light Emitting Diode DIY Kit Digital Infrared Obstacle Water Level Sensor

Product Name:KY-039 Finger Measuring Heartbeat Sensor Module for Arduino Brand New
SKU:3276

For more items, Please click here

Items Description

Features:

This project uses bright infrared (IR) LED and a phototransistor to detect the pulse of the 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 phototransistor will be slight changed.

We chose a very high resistance resistor R1, because most of the light through the finger is absorbed,it is desirable phototransistor sensitive enough.Resistance can be selected by experiment to get the best results.
The most important is to keep the shield stray light into the phototransistor. 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.

ARDUINO test code:
// Pulse Monitor Test Script
int ledPin = 13;
int sensorPin = 0;
double alpha = 0.75;
int period = 20;
double change = 0.0;
void setup ()
{
pinMode (ledPin, OUTPUT);
Serial.begin (115200);
}
void loop ()
{
static double oldValue = 0;
static double oldChange = 0;
int rawValue = analogRead (sensorPin);
double value = alpha * oldValue + (1 - alpha) * rawValue;

Serial.print (rawValue);
Serial.print (",");
Serial.println (value);
oldValue = value;
delay (period);
}

Package:
1PCS x KY-039 Finger Measuring Heartbeat Sensor Module

Wholesale to save you more money / click here!

$13.98

$12.80

$6.50

$12.25

5pcs switches Liquid level sensor 4PCS 25W High Power LED DHT11 Digital Humidity & Temperature Sensor 10pcs DC-DC Converter Step Up

$10.39

$3.71

$24.07

$25.55

2pcs HC-05 Wireless Bluetooth 2pcs New HC-SR501 Human Sensor

5pcs 4 Channels 5V Relay Module

5pcs 2.4G NRF24L01+ Wireless Module Hot Category in our shop! Discount up to 50%!

Payment
Shipping
Feedback
Returns
About Us
FAQ

We accept PAYPAL payment ONLY. All the item(s) will shipped to your PAYPAL ADDRESS.

Please update your Latest Detailed, Exact and Precise PAYPAL Address when purchase.

(1) Items will be sent out in 1-2 working days when your payment is clear.

(2) For US customers,We use E-Packet(China Post), delivered in 7-15 days.

For Other countries, We use Singapore/Hongkong Post for Free shipping.
Order ? $40, Free Registered Tracking is provided for you.
Order ? $40, but need Tracking, you may pay extra cost for $3-$5.

(3) Expetited Shipping Service(DHL,FEDEX,EMS) is also provided,Plz contact us for details.

(4) About tax,We will do our best to help you to clear the goods,and the tax depends on each country custom.

(5) As it is international shipping, Please be patient for your package. We offer Replacment or Refund if you cant get package.

When you are satisfied with our service or product, Please leave us Positive Feedback & 5 Star DSR as the following image. Your satisfaction and support is
extremely important to our work!

If you experience any problem, please feel free to contact us in advance. We promise to try our best to safisfy you!

Please view How to leave us the Positive feedback STEP BY STEP.

(1)If for some reason you're not satisfied with our service or product quality, please contact us within 3 days after you get the package, you can return the products to us in original package and we will refund your money after we get the package!(Shipping cost is NOT refundable and you should responsible for the return shipping)

(2)Although we test each item and they are packed professionally, few item(less than 0.1%) might be damaged during the shipping. You are welcome to contact us within 3 days after you receive your package about replacement.

(3)Repair Some items might be broken caused by improper use, we are always happy to offer any helpful repair service. Of course, you can send the broken items back to us and we will help you resolve the situation and charge reasonable repair fees.

ASP_EZone store is a leading company specializes in all kinds of Electronic products, such as LEDs ,electronic devices and components, development modules, development boards, consumptive materials and so on.

As we are locating in Shenzhen, the world biggest electronic market, we almost can supply you all products you may need with best price!

ASP_EZone store has gained thousands upon thousands of registered customers from all over the world. We offer world wide free shipping and have already
shipped to more than 150 countries including United Sates, United Kingdom, Canada, Australia, France, Germany, Russia, Italy, New Zealand, Spain, Brazil,
Japan, Singapore, Korean, etc.

Here is a list of reasons for trusting ASP_EZone store as your reliable source of IC products or business cooperator:

1.Competitive Price

2.High Quality Products

3.Excellent R & D team

4.Excellent shopping platform

5.Excellent Customer Experience

6.Excellent Team Work

In ASP_EZone store, we provide variety of IC products, sell them at the best price, and offer the best service.You will never regret to have ASP_EZone store as your reliable IC item source, supplier, and business cooperators.

We can develop projects for the Electronic enthusiasts in this field for free.

If you have any question, you can contact us

(1)Why Buy From ASP_EZone?
Selection:We've been specialized in electronics for years in the biggest Electronic Market In Shenzhen China. We are the One-Stop Supplier For all kinds of Electronic components.
Price: We offer great deals on our products , we are always working hard to save you more money!
Service: Our Sales and Service Squad wants to do anything we can to make shopping an easy and fun thing. Try to find something? We can help. Have any questions? We can help. You get the idea. We're always here to support you every step of the way.

(2)What is the condition of the item?
All our items are Brand NEW. All the items are tested carefully before shippping out.

(3)Do you offer gift ?
Yes,sure! You can choose one listing in our Gift Section if your purchase is over $25. Please make sure to leave us a note and tell us which item you want when place the order.

(4)How much does it cost to ship to my country?
For Free. We provide free shipping for almost all items,except for some items that are a little heavy. NOTE: US customers are required to add additional shipping fee because we ship to you via E-Packet. As long as your order is over $40, we can offer you the free tracking number,which is also our recommendation.

(5)Do you combine shipping?
Yes, sure! we will combine all your orders placed in the same time period(normally one day)in one package if there is no special instructions from you.Please make sure to leave us a note if you place multiples orders and the address is not the same.

(6)How do I pay for my purchase?
We accept PayPal payment ONLY.

(7)Can I Cancel or Change My Order?
If you need to cancel an order or make any changes to it, please call:+86-0535-6849126