5v Heartbeat Sensor Senser Detector Module By Finger For Arduino Sc2

US $0.99

Shen Zhen, China
Jun 9th

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Description: Features: 1.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. 2.Chosing 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 int ledPin=13; int sensorPin=0; double alpha=0.75; int period=20; double change=0.0; void setup() { pinMode(ledPin,OUTPUT); } void loop() { static double oldValue=0; static double oldChange=0; int rawValue=analogRead(sensorPin); double value=alpha*oldValue+(1-alpha)*rawValue; change=value-oldValue; digitalWrite(ledPin,(change0.0)); oldValue=value; oldChange=change; delay(period); } Package Included: 1 x 5V Heartbeat Sensor Senser Detector Module By Finger For Arduino We offer WORLDWIDE SHIPPING. (Except China, Italy, and Croatia) Orders will be processed and dispatched within 24-48 hours after payment is clear. We only ship to confirmed eBay addresses. Your eBay address MUST MATCH your Shipping address. If you have not received your shipment within 30 business days from payment, please contact us. We will track the shipment and get back to you as soon as possible. Our goal is customer satisfaction! Please note that estimated delivery time is depended on destination countries, and may subject to customs clearance process, and weather condition in your area. Country Delivery Time (days) Not including Handling time, weekend, and holidays 9-12 13-18 19-24 25-29 30-35 >35 United States 5% 50% 30% 11% 5% Refund United Kingdom 10% 63% 19% 3% 4% Refund Australia 21% 50% 14% 7% 7% Refund France 11% 29% 44% 10% 7% Refund Germany 11% 22% 30% 21% 16% Refund Canada 0% 47% 31% 18% 4% Refund Spain 4% 25% 48% 13% 11% Refund We accept PayPal payment only, and must be received within 3 days from the date of purchase. Please leave note in PayPal when making the payment if you have any special requests. Orders will be processed instantly and dispatched within 1-2 days, so we do NOT accept any email/message note after you place orders. IMPORTANT! PLEASE READ! Buyers are responsible for import duties, custom fees and taxes, if any. Please check with your country’s custom office to determine the additional costs impose on the item prior to buying. We offer 14 days return policy. Please contact us within 14 days t from the date you receive your order if you have any issues with the product and would like to return. All returned items MUST BE in the original packaging and you MUST PROVIDE us with the shipping tracking number, specific reason for the return, and your eBay ID. We will refund YOUR FULL WINNING BID AMOUNT, upon receipt of the item in its original condition and packaging with all components and accessories included, AFTER BOTH Buyer and Seller cancel the transaction from eBay. OR, you may choose to have a replacement. Buyer is responsible for return shipping cost. We strive for our customer satisfaction at best possible. If you have any questions, please feel free to email our service specialists 24 Hours a Day, 7 Days a week. We will reply you ASAP. If no response within 24 Hours, please check the spam in your mail box. We greatly appreciate your POSITIVE feedback. Please do NOT leave negative feedback without asking for help. Our aim is to provide Top Level Customer Service, normally so we will try our best to solve any problem you have. Please DON'T leave negative or neutral feedback if you haven't received item in 30 days, because we have mentioned the shipping time repeatedly. We maintain high standards of excellenceand strive for 100% customer satisfaction! Feedback is very important to us. We request that you contact us immediately BEFORE you give us neutral or negative feedback, so that we can satisfactorily address your concerns. Powered by eBay Turbo Lister The free listing tool. List your items fast and easy and manage your active items. On Sep-07-15 at 22:01:40 PDT, seller added the following information:

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