Operating principle ON OFF Light sensor | LDR+IC4017+Lamp
The LDR sensor is a photoresistor, a photoelectric cell sensitive to the quantity of light received. A variation of light (or shadow) causes a signal variation. It is a passive sensor.
These sensors can be used as presence, movement or passage detectors, ambient
Using the photoresistor as a light detector. The electrical assembly is a voltage divider bridge. This video shows by experience how the photoresistor works. The use of an ohmmeter makes it possible to show the evolution of the resistance of the photoresistor according to the illumination of this one. The electrical circuit is explained in detail. This experiment allows you to apply important notions of electricity seen in fourth grade, such as Ohm's law and electrical resistance in a circuit. Following this video, students have an activity to complete at home. In two other videos of this science lab channel, this photoresistor is used to detect lights such as infrared and ultraviolet.
Operating principle ON OFF Light sensor | LDR+IC4017+Lamp
The LDR sensor is a photoresistor, a photoelectric cell sensitive to the quantity of light received. A variation of light (or shadow) causes a signal variation. It is a passive sensor.
These sensors can be used as presence, movement or passage detectors, ambient
Using the photoresistor as a light detector. The electrical assembly is a voltage divider bridge. This video shows by experience how the photoresistor works. The use of an ohmmeter makes it possible to show the evolution of the resistance of the photoresistor according to the illumination of this one. The electrical circuit is explained in detail. This experiment allows you to apply important notions of electricity seen in fourth grade, such as Ohm's law and electrical resistance in a circuit. Following this video, students have an activity to complete at home. In two other videos of this science lab channel, this photoresistor is used to detect lights such as infrared and ultraviolet.
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