TSOP1738
TSOP1738 is a commonly used IR receiver for Infrared PCM remote control systems. This component is built with PIN Diode, Preamplifier and internal filter for PCM (Pulse Code Modulation) frequency and its epoxy package is designed as an IR filter. These are available with different carrier frequencies out of which TSOP1738 is very common whose carrier frequency is 38KHz. The output of TSOP17XX receivers can be directly connected to a microcontroller or microprocessor for further processing.
Working Principle:
The photo module has a circuitry inside for amplifying the coded pulses from the IR transmitter. The front end of the circuit has a PIN photodiode and the input signal is passed into an Automatic Gain Control(AGC) stage from which the signal passes into a Band pass filter and finally into a demodulator. The demodulated output drives an NPN transistor. The collector of this transistor forms the output at pin3 of the module. Output remains high giving + 5 V in the standby state and sinks current when the PIN photodiode receives the modulated IR signals.
Features (take from data sheet : due diligence)
Photo Detector, IR Filter, Preamplifier and PCM frequency filter in one package
- Shielding against EMI or RFI interference
- CMOS and TTL Compatible
- Active Low Output
- Immunity against ambient light
- Low Power Consumption
- Able to transfer data continuously up to 2400bps
- Supply Voltage : 4.5 – 5.5V
Specifications
Supply Voltage (Pin 2) –0.3…6.0 V
Supply Current (Pin 2) 5 mA
Output Voltage (Pin 3) –0.3…6.0 V
Output Current (Pin 3) 5 mA
Storage Temperature Range –25…+85 C
Operating Temperature Range –25…+85 C
Link to data sheet:
Do’s and dont’s:
Do cover the LED’s with some tap while using the sensor in outdoor.
Do avoid contact IR rays coming from sun.
Do not bend the leads of IR LED’s.
Do not give voltage more than 5V.
Do not drop sensor from height as it can break LED’s.
Storing Instructions:
Store in a closed container away from direct sunlight.
Advantages:
- Low energy consumption.
- Cost effective.
- Easy to use.
Disadvantages:
- The signal can be blocked by any foreign material that is in front of the transmission.
- Short Range
- Speed of Transmission is low.
Schematics:
Connections with Arduino:
Arduino Code:
#include <IRremote.h>
int RECV_PIN = 11;
IRrecv irrecv(RECV_PIN);
decode_results results;
void setup()
{
Serial.begin(9600);
irrecv.enableIRIn(); // Start the receiver
}
void loop(){
if (irrecv.decode(&results)) {
Serial.println(results.value, HEX);
irrecv.resume(); // Receive the next value }
}
Applications:
Decode Remote signals
Analyse, re-create or duplicate remote Signals
Wireless control applications
Receiver circuit for IR remote controls
IR Remote tester circuits
FAQ’s:
Q1. Does it receive signal from any infrared tv remote?
Ans. Yes.
Q2. Can this read the signal code sent by any tv remote?
Ans. No.
Q3. Is this can be used in rc toys?
Ans. Yes, but it will require support circuitry.
Referral Links:
2.https://www.electroschematics.com/4338/tsop-1738-photo-module-design-notes-2/
Documentation links :