Beam Photoelectric Sensor Electric Counter Module


This small amplifier board has a big sound and will produce very audible output from almost any circuit You can obtain 6W?3Wx 2?at 5V. This board will allow you to add sound to your next project

  • External dimension: 24 x 15.5mm (length x width)
  • Operating voltage: 3.6V~5.5V
  • Output power: 6W(3W x 2?4?)
  • SNR?90dB
  • Efficiency?>90%
SKU: 171-1


This module is a high-quality infrared counter module. It is very cheap in price. It comes with a small size and an integrated LM 393 chip. it is widely used in motor speed detection, pulse count, position limit.


  • It is using an imported groove optical coupling sensor and its width is 5mm.
  • It has an output in state light. If the output is on a high level, the light is off.
  • If the output is at a low level then the light is ON.
  • The output will be at a high level if it will be covered. And otherwise, its output level will low.
  • It has a good signal and waveform. It has a strong driving ability for more than 15mA.
  • It works on 3.3V to 5V.
  • It has a digital switch output of 0 and 1.
  • It is equipped with a fixed bolt hole and it is easily installed.
  • Its PCB size is 3.2cm x 1.4cm.
  • We can use LM393 wide voltage comparer.

Specifications of FC-33 10mm Arduino RPM Sensor Rotational Speed Measuring Sensor:

  • Its VCC connects to the positive 3.3 or 5V power supply.
  • Its GND connect to the ground pin.
  • Its Do pin is TTL switch signal output.
  • Its A0 pin is not working.
  • D0 data output interface can be directly connected to the microcontroller input-output port.
  • If we block the detection sensor, then the speed of the motor encoder can be detected.
  • This D0 module can be connected to the relay, limit switch, and other functions.
  • It can also be connected with the active buzzer module.
  • We can compose alarm through this module.

Applications of Photoelectric Infrared Count Sensor:

  • It is widely used in motor speed detection.
  • It is also used in pulse count.
  • It is also used in the position limit.


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