Finger Measuring Heartbeat Sensor Module for Arduino, US $2.32 – Picture 0

Finger Measuring Heartbeat Sensor Module for Arduino, US $2.32 – Picture 1

Finger Measuring Heartbeat Sensor Module For Arduino

US $2.32

Shenzhen, China
Jan 29th

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Recommendations For You NE555 Cycle Frequency Module Square Wave NE555 Adjustable Frequency Pulse Generator Module NE555+CD4017 Light Water Electronic suite DIY Kits Muti_Function Perfect Version Delay Module H/L/NC/NO Trigger Wobbly windbell DIY Kits Electronic Production/YFL-80 907 constant temperature soldering iron (pro-duction) Visit my eBay Store:ChipWorld Product Name: NEW KY-039 Finger Measuring Heartbeat Sensor Module for Arduino More Items In Our Store,Click Here! SKU: 3276 Parsts No. : Package: Brand: Quantity: 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. 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); } For more quantity, please contact me.(My skype: ada-yu2013) The Standard shipping we provide is non-regiested mail without a tracking. We provide free shipping with tracking number when your order is over $50. If your oder is below $50 and you need tracking, please contact me. Maybe you request Mouse over image to zoom LCD2002 2002 20x2 Character Display Module for Arduino Yellow new NEW 3.5" TFT LCD Module Display + Touch Panel + PCB adapter NEW 4.3" TFT LCD Module Display + Touch Panel + PCB adapter NEW 7" TFT LCD Module Display + Touch Panel + PCB adapter Mouse over image to zoom 2PCS 12864 Blue Backlight 128X64 Dots Graphic Matrix LCD Module Display LCM GOOD $ 9.94 + free shipping $ 22.94 + free shipping $ 39.85 + free shipping $ 65.0 +free shipping $ 18.0 + free shipping Any problem, please contact us freely 1) We accept PayPal payment ONLY. inkFrog Analytics