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TSOP1838 IR Receiver

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The TSOP1838 is a miniature IR receiver IC form the TSOP18xx series. This particular model TSOP1838 will respond to 38kHz IR signals from remote control devices. It is normally used as IR receiver in remote control applications like TV, AC etc. This version is small in size and hence can be used in compact devices


Pin Description

Pin Number

Pin Name




The signal pin gives out the sequence based on the IR signal detected



Connected to the Ground of circuit



Typically connect to +5V, 2.5V to 5.5V


TSOP-1838 Features

  • Operating Voltage: 2.5V to 5.5V
  • Carrier Frequency  (38kHz)
  • Operating current: 5mA
  • High Range and wide coverage area.
  • Improved immunity against HF and RF noise
  • Has in-built pre amplifier
  • TTL and CMOS compatible

Note: Complete Technical Details can be found at the datasheet given at the end of this page.


Alternative IR Sensors: IR Receiver Led, TSOP17-xx


Where to use TSOP-1838 Sensor

The TSOP sensor has the ability to read the output signals from home remotes like TV remote, Home theatre remote, AC remote etc.. All these remotes will work with a frequency of 38kHz and this IC can pick up any IR signals process them and provide the output on pin 3. So if you are looking for a sensor to analyse, re-create or duplicate the functions of a remote then this IC will be the perfect choice for you.

Also keep in mind that this series TSOP-1838 will receive only 38Khz IR signals. All remotes in India will operate in 38Khz, kindly ensure if it is the same in your country.


How to test and use TSOP1838 Sensor

The TSOP-1838 is an IR Receiver Sensor, which can be used to receive IR signals of 38Khz. The sensor operates on 5V and consumes around 5mA to operate. Normally the signal pin (pin 1) IC is connected to a microcontroller to analyse the IR signal received. But let’s consider that you just purchased the IC and you want to check it is working. To do those just connect your TSOP as shown in the test circuit below

Testing TSOP-1838 Sensor


Now use any IR remote that’s lying around in your home and press any button on it. You should notice the Green Led blinking each time you press any button. This is just to ensure that the sensor is working as it has to be. Now, you can proceed with any MCU or MPU to decode the received IR signal. Once the IR signal is decoded you can re-create it using an IR Blaster.


TSOP-1838 Applications

  • Receive IR signals
  • Decode Remote signals
  • Analyse, re-create or duplicate remote Signals
  • Wireless control applications
  • Receiver circuit for IR remote controls
  • IR Remote tester circuits
Component Datasheet

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