Instructions for use:
Connect VCC and GND, the module signal indicator will light up, when there is no blocking in the module slot, the receiver tube conducts and the block OUT outputs a high level; when it is blocked, OUT outputs a low level and the signal indicator goes out.
The module OUT can be connected to a relay to form a limit switch and other functions, and can also be connected to an active buzzer module to form an alarm.
OUT output interface can be directly connected to the microcontroller IO port, generally connected to an external interrupt, detect whether the sensor is masked or not, such as with a motor code disk can detect the speed of the motor.
Caution:
Correct wiring, please do not reverse the positive and negative connections, so that the board electronics burned.
The player should set the MCU's I/O port to input mode/receive mode, otherwise it won't work.
Other MCUs, or more advanced control boards such as ARM these, if you need to set the I/O port for input/output mode, you must set it to input mode/receive mode, otherwise it cannot be used.
51 series microcontroller can be used directly without setting input/output mode.

Product Specifications: IR infrared sensor module
Product Color: Blue
Product Material: Copper
Slot Width: 5.9mm/0.23in
Product Size: 26.7x21mm/1.05x0.83in (LxW)
Operating voltage: 3.3V-5V
Output Format: Digital switching OUT output (0 and 1)
Connector type: screwed
Warm tips: As the size is measured manually, please allow 1-2mm error, please don't mind when you buy.