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TSOP 1738 Sensor Module
SKU: A112 | Weight: 0.1 kg.
119.00
In stock
The TSOP 1738 is a member of IR remote control receiver series. This IR sensor module consists of a PIN diode and a pre amplifier which are embedded into a single package. The output of TSOP is active low and it gives +5V in off state. When IR waves, from a source, with a center frequency of 38 kHz incident on it, its output goes low.
Lights coming from sunlight, fluorescent lamps etc. may cause disturbance to it and result in undesirable output even when the source is not transmitting IR signals. A band pass filter, an integrator stage and an automatic gain control are used to suppress such disturbances.
TSOP module has an inbuilt control circuit for amplifying the coded pulses from the IR transmitter. A signal is generated when PIN photodiode receives the signals. This input signal is received by an automatic gain control (AGC). For a range of inputs, the output is fed back to AGC in order to adjust the gain to a suitable level. The signal from AGC is passed to a band pass filter to filter undesired frequencies. After this, the signal goes to a demodulator and this demodulated output drives an npn transistor. The collector output of the transistor is obtained at pin 3 of TSOP module.
Members of TSOP17xx series are sensitive to different center frequencies of the IR spectrum. For example TSOP1738 is sensitive to 38 kHz whereas TSOP1740 to 40 kHz center frequency.
TSOP-1738 Characteristics
• Minimum and Maximum Input Voltage is -0.3 and 5V respectively. Typically +5V is used.
• Can detect IR signals from Remotes (38kHz)
• Operating current: 5mA
• High Range and wide coverage area.
• Will respond only to IR signals, due to high immunity against ambient light
• Low power consumption
• Has in-built pre amplifier
• TTL and CMOS compatible
Where to use the TSOP1738 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 analyze, 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-1738 will receive only 38 KHz IR signals. All remotes in India will operate in 38 KHz; kindly ensure if it is the same in your country.
How to test and use the TSOP-1738 Sensor:
The TSOP-1738 is an IR Receiver Sensor, which can be used to receive IR signals of 38 KHz. The sensor operates on 5V and consumes around 5mA to operate. Normally the signal pin (pin 3) IC is connected to a microcontroller to analyze 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
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-1738 Applications
• Receive IR signals
• Decode Remote signals
• Analyze, re-create or duplicate remote Signals
• Wireless control applications
• Receiver circuit for IR remote controls
• IR Remote tester circuits.