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Product Details
Congratulations to okystar for becoming a strong customer of Alibaba
Specification: 1. Weight: 4g 2. Color: black 3. Type: voltage regulator 4. Condition: brand new 5. Quality: high quality 6. Application: DIY; electronic products; STEM education 7. Theory: detect sensor 8. Customized: available 9. Pin number: 3 pin Description: 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. 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. Choosing 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. Package List: 1 * Mini Fingers Measuring Heartbeat Detect Sensor Module | |||||||
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Our company
Okystar Technology Co., Ltd is subsidiary of Okystar Technology Group Co., Ltd, which holds 4 subsidiary companies and more than 1500 skilled workers,50 technicians.Okystar Tech Co.,Ltd was built in 2004.We mainly manufacture and export 3D Printer, Board&shield, sensor module, Smart Car Robot, Smart DOF Robot, Servo, DIY toys ,Science toys, Mainboard,etc.
After 15 years development, our company has grown into a large high-tech group corporation integrating industry, technology and trading. With electronic information industry as our main business, we keep being top 10 in the board, shield, sensor, modules for arduino.
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FAQ
1. What is the delivery time?
Normally, 1-5 workdays after payment;
Special requirement orders, delivery time is negotiable.
2.If the products can’t work after receiving it,what should I do?
We will replace new items for you at once, and respect your final decision for wrong goods.
3.If the products don’t meet my demand after I received it,can I return it?
Yes,no problem.
You can return back to us, we will refund your full payment.
4.what is the warranty?
1-2 years warranty according to different products.
1-3 months to replace new items for free.
All products are tested strictly for 2-3 times before leaving factory. we have earned very good reputation in quality,Certified by the ISO9001.
Leonardo R3 With USB Cable 32U4 UNO R3
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