KEYES Heartbeat measurement Detector Module By Finger For Arduino, US $410 – Picture 0

KEYES Heartbeat measurement Detector Module By Finger For Arduino, US $410 – Picture 1

Keyes Heartbeat Measurement Detector Module By Finger For Arduino

US $410

Shenzhen,Guangdong, China
Jan 29th

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Specification: KEYES Finger heartbeat measurement module 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,(change<0.0&&oldChange>0.0)); oldValue=value; oldChange=change; delay(period); } Package includes: 1x KEYES Finger heartbeat measurement module ICA345 Payment Policy We only accept PAYPAL.Payment must be received within 5 days of the auction close. We reserve the right to cancel the transaction and relist the item if payment has not been received within this time frame. Shipping Policy For international orders, we are not responsible for any charges, taxes, fees or delays imposed on you by your Country's Customs Department.Most orders ship within 1 business days of receiving cleared payment (excluding holidays and weekends).If this is your first deal with us or buying for an item which needs international shipping, we suggest you review our shipping terms in descriptions. International shipping usually takes longer time than domestic, since it’s based on shipping service provider and both countries Customs.Estimated delivery time varies by destination but usually take 20-30 business days(excluding holidays and weekends),or longer for certain countries. It depends on the cleared payment and your local post office process. Feedback We offer FREE SHIPPING.POSITIVE FEEDBACK WITH AN OVERALL 5 DETAILED SELLING RATING(DSR), which means CRITICAL for us – a new but studious team on eBay, your great comments will lead us to get more potential customers, and make us more confident to develop business and serve you better.If there is ANY dissatisfaction, don't hesitate contacting us via ebay message We will meet your need by all means available. Return Policy Upon receipt of your item, if you are not completely satisfied please contact me via e-mail immediately. * You may return the item within 14 days from the date you received it. * I will refund the total amount you paid or you may choose an item of equal value from one of my auctions or from my store.