TSOP1738 is an infrared receiver tuned to receive IR of frequency 38 kHz only. It is perfect for making obstacle sensors and reading signals from most IR remotes (TV, AC, Home Theatre Remotes, etc). When used as a receiver in distance sensors, it provides better performance as it allows better reception and protection from ambient light compared to other IR receivers. It can be used to read signals of most IR Remotes.
The TSOP1738 IR sensor module consists of a PIN diode and a preamplifier which are embedded into a single package. The output of TSOP is active low and it gives +5V in the 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 bandpass filter, an integrator stage, and 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.
The sensor can be used for Proximity detection applications along with an IR-led in robotics and security systems. It receives an IR signal at 38khz frequency.
- 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
- 1 x TSOP 1738
|Power consumption||0.4 to 1.0 mA|
|Min Radiation||0.35 mW/m2 type|
|Angle of detection||90 degrees|
|Dimensions of the casing||12.5 x 10 x 5.8 (mm)|
Frequently Asked Questions
1. What is TSOP? What does 1738 mean?
- TSOP is the standard IR remote control receiver series, supporting all major transmission codes. It has Low power consumption and High immunity against ambient light.
1738 in TSOP 1738 indicates infrared receiver is tuned to receive IR of frequency 38 kHz only.
2. How does TSOP 1738 sensor work?
- The (+) and the (-) are the supply pins of the IC and are specified to be connected across a 5V typical supply level, to be precise any voltage between 3 and 6V may be applied here, although 5V works the best. The curved lens which can be seen over the central portion of sensor body is where the infrared signal from a remote control handset is focused for enabling the TSOP to initiate its sensing operations.
3. Where to use TSOP-1738 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.