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Sensor - Coggle Diagram
Sensor
Light Related Sensors
Color Sensor
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Has a photo dial for RGB (red, green, blue)
Heart Pole Sensor
Simple optical heart sensor with amplification and noise cancellation -- helps for reliable pulse reading
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Infrared Distance Sensor
Sends infrared beam to an object, detects the bounce beam of light and depending on where it touches sensor, it can detect bounce angle and distance to object
Infrared light used as we're surrounded by visible light, that will result in a lot of noise
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Direct Infrared Sensor
It has an infrared LED which sends light and the photo transistor will detect the light reflected on the object
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EXAMPLE: Infrared Remote --- more infrared light, higher output, or if its digital, then will get higher when it comes close to sensor. Has an amplifier.
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General
Gas Sensor
Senses specific types of gases like flammable gases, air quality or alcohol in the air that one exhales
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Uses an amplifier, and occasionally an analog
Distance Sensor
Uses ultrasound pulses -- sends sound wave, detects bounced wave, and detects time to get it back
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Current Sensor
Connect this module in parallel with load, it will measure current of load
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Hall Sensor
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If connected to 5 volts and ground, and if magnet placed near module, output will increase or decrease accordingly
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Sensor v/s Detector
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EXAMPLE : Movement Detector --- has a PIR sensor that senses infrared radiation, gives amount to an integrated chip, and will calculate if there was a movement or not. If movement is detected, the detector will have a high output and vice versa.
Detector needs a sensor - a device or module which sense changes in environment and sends that information
Other Groups
IMU Module
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Can detect accident, a peak value might imply a fast change inn acceleration
Can also detect movement, if it senses gyro forces and accelerations then it means the object moved
Magnetometer
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Can also be used in drones, along with a GPS module
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