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.. _cpn_receiver:

IR Receiver
===========================

**IR Receiver**

.. image:: img/ir_receiver_sl838.png
    :width: 400
    :align: center

* **S**: Signal output
* **-**: GND
* **+**: power supply, 3.3v~5V

SL838 infrared-receiver is a component which receives infrared signals and can independently receive infrared rays and output signals compatible with TTL level. It is similar with a normal plastic-packaged transistor in size and is suitable for all kinds of infrared remote control and infrared transmission.

Infrared, or IR, communication is a popular, low-cost, easy-to-use wireless communication technology. Infrared light has a slightly longer wavelength than visible light, so it is imperceptible to the human eye - ideal for wireless communication. A common modulation scheme for infrared communication is 38KHz modulation.


* Can be used for remote control
* Wide operating voltage: 2.7~5V
* Internal filter for PCM frequency
* TTL and CMOS compatibility
* Strong anti-interference ability
* Compliant RoHS


**Remote Control**

.. image:: img/image186.jpeg
    :width: 400

This is a Mini thin infrared wireless remote control with 21 function buttons and a transmitting distance of up to 8 meters, which is suitable for operating a wide range of devices in a kid's room.

* Size: 85x39x6mm
* Remote control range: 8-10m
* Battery: 3V button type lithium manganese battery
* Infrared carrier frequency: 38KHz
* Surface paste material: 0.125mm PET
* Effective life: more than 20,000 times


**Example**

* :ref:`ar_receiver` (Basic Project)
* :ref:`car_remote` (Car Project)
* :ref:`car_remote_plus` (Car Project)