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    7.   Temperature  Sensor:  A  temperature  sensor  detects  the  temperature of its
                        surroundings and converts it into an electrical signal. These sensors are used in a
                        variety  of applications,  such as  weather  stations, thermostats  and  systems  that
                        require temperature control, like heating and cooling devices.

                          Ask AIRO

                          What happens if I use the wrong sensor for my project?

                            VISUAL VAULT

                            Identify the following sensors and write their names:

                            1.                                             2.

                            3.                                             4.

                     WORKING OF SENSORS

                     Sensors function by detecting a specific type of input from the environment and converting it
                     into a signal that can be processed by a microcontroller or other devices. Let's break down how
                     sensors typically work:
                     1.  Detection: The sensor detects a specific physical phenomenon such as light, temperature,
                        motion or sound. This is the stimulus that the sensor is designed to detect. For example, a
                        temperature sensor detects the heat or cold in the environment, while an infrared (IR) sensor
                        detects heat emitted by objects.

                     2.  Conversion: Once the sensor detects the stimulus, it converts the physical information into a
                        measurable signal, typically electrical. This can be in the form of a voltage, current or frequency
                        change. For instance:
                            A photoresistor changes its resistance based on the amount of light falling on it.

                             An ultrasonic sensor sends out sound waves and measures the time it takes for the echo
                            to return, converting it into a distance measurement.
                     3.  Processing: The signal from the sensor is then processed by a microcontroller or an integrated
                        circuit. The microcontroller uses this signal to make decisions or trigger actions. For example,
                        if the temperature exceeds a certain threshold, the microcontroller might activate a cooling
                        system.

                                                                             Introduction to Sensors in Tinkercad
                                                                                                                        19

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