Sensors Archive

RFID Reader/EM18

The EM-18 RFID Reader module operating at 125kHz is an inexpensive solution for your RFID based application. The Reader module comes with an on-chip antenna and can be powered up with a 5V power supply. Power-up the module and connect the transmit pin of the module to

Reed Switch/Reed Sensor

A magnetic contact switch is basically a reed switch encased in a plastic shell so that you can easily apply them in a door, a window or a drawer to detect if the door is open or closed. The switch that we are going to use has

Microphone Sound Sensor

A microphone is an acoustic to electric transducer or sensor that detects sound signals and converts them into an electrical signal. This guide shows how to use the microphone sound sensor with the Arduino. The microphone sound sensor, as the name says, detects sound. It gives a

Tilt Sensor SW-520D

The “Tilt Sensor” is a device used for knowing the planar movement. Although they are available in various types their basic function remains the same. Their function is to detect the plane shift from horizontal to vertical and sent of a signal when it happens. There are

PIR Motion Sensor HC-SR501

The PIR motion sensor is ideal to detect movement. PIR stand for “Passive Infrared”. Basically, the PIR motion sensor measures infrared light from objects in its field of view. So, it can detect motion based on changes in infrared light in the environment. It is ideal to

Ultrasonic Sensor HC-SR04

SR04 Ultrasonic Distance Sensor is a popular and low cost solution for non-contact distance measurement function.  This module includes ultrasonic transmitter, ultrasonic receiver and its control circuit. The HC-SR04 ultrasonic sensor uses sonar to determine distance to an object like bats do. It offers excellent non-contact range

Smoke Sensor/MQ-2

The MQ-2 smoke or (Gas sensor) is sensitive to smoke and to the following flammable gases: LPG, butane, propane, methane, alcohol and hydrogen. The resistance across the sensor is different depending on the type of the gas. The smoke sensor has a built-in potentiometer that allows you