Motion Sensor Switch AC 220V Automatic Infrared PIR Switch for LED in Pakistan

Size: approx. 1.85 x 0.3cm/ 0.73" x 0.12" HALL EFFECT SENSOR 44E Hall Sensor Supply Voltage: 4.5-28V; Output Current: 25mA 3.5V to 24V DC operation voltage Low current consumption Temperature compensation Wide operating voltage range Open-Collector pre-driver 50mA maximum sinking output current

Size: approx. 1.85 x 0.3cm/ 0.73" x 0.12" Limit parameter (25 ) Power supply voltage VCC: 24V Output reverse breakdown voltage Vce: 50V Output low current IOL: 50mA Storage temperature range TS: -65 ~ 150 Operating temperature TA : E :-20 ~ 85 , L:-40 ~ 150 This sensor has 3 pins

KY-039 5V Finger Detection Heartbeat Sensor Module Detector For Arduino 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.

Description: SS49E Linear Hall-effect sensor is small, versatile linear Hall-effect device that is operated by the magnetic field from a permanent magnet or an electromagnet. The linear sourcing output voltage is set by the supply voltage and varies in proportion to the strength of the magnetic field. The integrated circuitry features low noise output, which makes it unnecessary to use external filtering. It also includes thin film resistors to provide increased temperature stability and accuracy.