Jk Smart Bms Jk Bms 100a Active Balance Jk-bd6a20s10p/12p, 8s 24v 20s Smart Bms 100amp 100ah For Lithium Battery Protection Module

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.



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.



DETAILS



Working voltage: 5V



Used for synthesized teaching experiment



Use IR LED and optical transistor to detect pulsation in fingers



Dimensions: 25 x 22 x 17mm



Weight: 2g