LM1815M

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• Introduction:

  The LM1815M is an active infrared receiver specifically designed for remote sensing applications. It features a wide-angle reception, strong noise immunity, and a low-power design, making it ideal for outdoor applications such as automatic lighting control or security systems. It is also suitable for indoor environment detection and proximity sensing. In this article, we will cover its application fields and working principle.

• Application Fields:

  The LM1815M is generally used for remote sensing applications, including:

  • Automatic lighting control
  • Security systems
  • Indoor detection
  • Proximity sensing
  • Remote control
  • Automatic door opening
• Working Principle:

  The LM1815M features a unique active infrared receiver design, which allows it to detect IR light or beam signals of varying frequencies and amplitudes, even in challenging environmental conditions. The receiver is composed of a phototransistor detector and optical filter, an amplifier stage, and a comparator. When an IR light or beam signal is detected, the phototransistor converts it into a current signal, which then passes through the amplifier to increase the gain. The amplified signal is then compared to a reference voltage and sent to the output pin. The output of the comparator then drives the active device on and off.

• Conclusion:

  The LM1815M is an excellent choice for remote sensing applications. It features a wide-angle reception and strong noise immunity, making it well-suited for outdoor and indoor applications. The active infrared receiver design ensures that the device can detect a wide range of IR signals with varying frequencies and amplitudes. With its low-power design and easy installation, the LM1815M is a great choice for any sensing application.

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