A sensor is a device which gives an output by detecting the changes electrical or physical quantities or events. Generally, sensor produce output will be in the form of electrical or optical signal. The sensor reads data in its own way because to understand what the sensor has read, we need to “convert” this to the form a computer can understand. The purpose of sensor is to send the information to other electronics. A sensor is always used with other electronics. We use sensor to make our work simple and efficient. The purpose of Sensors is used to measure physical quantities such as temperature, light, pressure, sound, and humidity. They send signals to the processor.
Types of sensors
There are different types of sensors which we used Temperature Sensor, IR Sensor, Ultrasonic Sensor, Touch Sensor, humidity Sensors, Pressure Sensor, water Level Sensors, Reed Switch Sensors, slot sensor, Motion sensor, Hall effect sensor etc.
Temperature is one of the most usually measured environmental quantity for different reasons. Generally, is a device that SENSES temperature and displays it in units called as temperature sensor. Types of temperature sensors such as thermistors, digital temperature, semiconductor temperature sensors
IR sensor circuit is using in our day-to-day life in our as remote control for TV. It is a simple IR sensor-based electronics project used for controlling a robotic vehicle remotely using the general IR Remote or TV remote
Humidity Sensors which measure the amount of water in the air and also measures moisture. A relative humidity is the ratio of moisture in the air to the highest amount of moisture at a particular air temperature Gives maximum response time. measures and.
Ultrasonic sensor can be used for measuring distance of an object or travel time by using ultrasonic waves. This method is used to measure like inaccessible areas.
Motion sensor can sense the movement or stoppage of parts, people, etc. Motion sensors are popular when it comes to security and energy efficiency. They can be used for burglary alarms or security cameras. It is used regularly in office buildings or restrooms.
Hall Effect Sensor
Hall Effect sensor works on principle of magnetic effect. The input of hall effect sensor is Magnetic field and the output is electrical signal. To activate Hall Effect sensor External magnetic field is applied. All magnets have two main characteristics which are Flux density and polarity. Magnetic flux density is always present around the object. Therefore, the output of the Hall Effect sensor will be function of the flux density. This sensor is used for GPS position detection, Speed detection, to control motor.
A sensor which capture a physical touch. They operate as a switch when touched. These sensors are used in lamps, touch screens of the mobile, Fridge, oven, musical instruments, keypads touch-pad