These are high power 5mm Infrared Red Light Emitting Diode sensor emits light at a range of 700nm to 1mm. An IR sensor is an electronic sensor that measures and detects the infra-red light radiating from an object or its environment. These lights are not visible by naked eyes but can be seen through a camera. That is the reason why these IR sensors used in night vision cameras. When light falls on the IR sensor, the photodiode response in terms of change in resistance. This change in resistance measured in terms of voltage. This module can be connected directly to a microcontroller, Arduino, or Raspberry Pi with a few current limiting resistors.
A combination of IR LED and Photodiode used for proximity and color detection. This IR LED consists of two parts, a Transmitter, and a Receiver. The transmitter emits IR light, and the object reflects that light. The photodiode (receiver) receives the reflected light. The amount of reflection and reception varies with distance. These differences cause a change in the input and thus used for proximity detection. IR LED sensor module has both the transmitter and emitter designed to work on the 940 nm wavelength.
In an IR LED the type of incidence can be direct incidence or indirect incidence. Thus in the case of direct incidence, the IR LED placed in front of the photodiode without any obstacle in between. Whereas in indirect incidence, both the diodes placed side by side with an opaque object in front of the sensor. The light from the IR LED hits the opaque surface and reflects back to the photodiode. The amount of reflected light depends upon the color of the reflected surface.
- Infrared applied systems
- Transmission system
- Optoelectronic switch
- Infrared remote control equipment’s
- Smoke detector