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The infrared obstacle avoidance sensor transmits infrared light through a transmitter, and detects the change in the amount of light reflected by the detection object or blocked by the receiver to obtain an output signal.
The working principle is based on the photoelectric effect, converting photon energy into electron energy. It consists of a light source, receiver, and signal processing circuit. The source irradiates the object; the receiver captures the reflected, transmitted, or scattered signal; and the processing circuit amplifies and filters the signal to provide precise detection.
Application: Automatic doors, elevators, security systems, etc.
| Operating voltage | 3.3V~5V |
| Operating temperature | -40°C~+70°C |
| Output signal | Digital signal |
| Size | 3.16cm * 2.38cm |
| Signal | Connection |
|---|---|
| VCC | 5V |
| GND | GND |
| Sign | Digital Pin 23 |
Note: Expansion board is attached to esp32 controller board.





