5V Heartbeat Sensor Senser Detector Module By Finger For Arduino B2, US $2.66 – Picture 0

5V Heartbeat Sensor Senser Detector Module By Finger For Arduino B2, US $2.66 – Picture 1

5V Heartbeat Sensor Senser Detector Module By Finger For Arduino B2, US $2.66 – Picture 2

5V Heartbeat Sensor Senser Detector Module By Finger For Arduino B2, US $2.66 – Picture 3

5V Heartbeat Sensor Senser Detector Module By Finger For Arduino B2, US $2.66 – Picture 4

5v Heartbeat Sensor Senser Detector Module By Finger For Arduino B2

US $2.66

HK, Hong Kong
Jun 9th

Open on mobile:
QR code

Specifications 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 Pictures Shipping Options 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 Notice

Condition:	New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is applicable). Packaging should be the same as what is found in a retail store, unless the item is handmade or was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag. See the seller's listing for full details. ...	Brand	Unbranded/Generic
MPN	Does not apply
UPC	Does not apply