5V Black Heartbeat Sensor Senser Detector Module By Finger
Brand Name:Oky Newstar
Model Number:oky3434
Minimum Order Quantity:10 Piece/Pieces
Delivery Time:3-5 workdays after payment
Payment Terms:L/C,D/A,D/P,T/T,Western Union,MoneyGram
Place of Origin:Guangdong China (Mainland)
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Location:
Shenzhen Guangdong China
Address:
Room1105, Block B, Chinto Technology Building, Minzhi Road, LongHua, ShenZhen city, GuangDong province, China
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5V Heartbeat Sensor Senser Detector Module By Finger
Descriptions:
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.
| 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. |
| 2. 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. | |
| 3. 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. | |
| 4. 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. |
| Test Code for Arduino: | int ledPin=13 |
| int sensorPin=0 | |
| double alpha=0.75 | |
| int period=20 | |
| double change=0.0 |
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5V Black Heartbeat Sensor Senser Detector Module By Finger
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