Important facts about modern technology

 


Main Sensors in a Smartphone and Their Functions

No.Sensor NameWhat It Does (Function)Used In
1️⃣AccelerometerMeasures linear acceleration (movement and tilt) along X, Y, Z axes.Screen rotation, step counting, shake detection
2️⃣GyroscopeMeasures rotation and angular velocity (how fast the phone turns).Gaming, VR/AR, panorama camera mode
3️⃣MagnetometerDetects magnetic fields → helps find direction (like a compass).Maps, compass apps, location accuracy
4️⃣Proximity SensorDetects how close an object is to the screen.Turns screen off during a call
5️⃣Ambient Light SensorMeasures surrounding light intensity.Auto screen brightness adjustment
6️⃣GPS (Global Positioning System)Uses satellites to find location.Maps, navigation, tracking, geotagging
7️⃣Fingerprint SensorReads unique fingerprint patterns.Security, phone unlock, payments
8️⃣BarometerMeasures air pressure → helps calculate altitude.Weather apps, GPS accuracy, fitness tracking
9️⃣Temperature SensorMeasures device or ambient temperature.Battery protection, weather monitoring
🔟Humidity SensorMeasures the amount of moisture in air.Weather, environmental monitoring
11️⃣Heart Rate SensorDetects heartbeat using infrared light.Health and fitness apps
12️⃣Hall SensorDetects magnetic fields — used to know if a cover/flip case is closed.Smart covers, magnetic accessories
13️⃣Infrared (IR) Sensor / BlasterSends infrared light to control devices like TVs or ACs.Remote control apps
14️⃣NFC (Near Field Communication)Enables short-range wireless data transfer.Contactless payments (Google Pay, etc.)
15️⃣MicrophoneDetects sound waves and converts them to electrical signals.Calls, voice recording, AI assistants
16️⃣Camera SensorCaptures light to take photos/videos; includes ambient light and color sensors.Photography, face unlock, AR apps

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