38 kHz signa arduino demodulation

I need to demodulate signal with frequency 38 kHz coming from remote controller without IR receiver,I need demodulate it and as a result get information from it.
Is there any examples of similiar task.
I woud be grateful for any help.

Hello,

5 years ago I had occasion to do the same thing for a project detailed here.

I used a TSOP1736 salvaged from a defunct satellite box. The data sheet for it can be found here

http://dalincom.ru/datasheet/TSOP1736.pdf

I simply connected the TSOP output to Arduino input pin, and ran the following sketch, but you could easily write your own -

// *********************************************************************
//   Author:                         Simon Bell.
//
// This may not be the best way to do it, but it's the way I've done it.
// *********************************************************************


int sensorPin = 12;    // select the input pin
int sensorValue[850]; // array to store the value coming from the sensor
int datapresent = 0;
void setup() {
  Serial.begin(9600);   // initialize serial communications at 9600 bps:
  pinMode(sensorPin, INPUT);
  digitalWrite(sensorPin, HIGH);
}
void loop() {
  int x;
  while (digitalRead(sensorPin) ==1)
    {}          // do nothing
  for (x=0; x <= 849; x++)
    {
    sensorValue[x] = !digitalRead(sensorPin);
    delayMicroseconds(100);
    }
    for (x=0; x <= 849; x++)
    {
    Serial.println (sensorValue[x]);
    }
   Serial.println ("Done");
   delay(10000);
}

This presents a series of 0’s or 1’s in the serial monitor.
I then pasted the output into an Openoffice spreadsheet to produce the ‘graphs’ shown in the Simple TV Remote project.

Hope this helps.

AndroidWorld:
I need to demodulate signal with frequency 38 kHz coming from remote controller without IR receiver . I need to demodulate it and as a result get information from it.
Is there any examples of similiar task.
I woud be grateful for any help.

Without?
Then what will you use for "infrared sensing"?
A photo-transistor? And then "look" for 26usec transitions? Or employ other circuitry?

If you're "tricky" and you can open the remote then you could possibly tap the signal that's "driving" its LED - not that I want to go into how you would do that.

Yes (I assume it was a typo and you have the IR receiver that you mentioned)

Follow the examples in the IRrremote or IRLib libraries.

Other links that may be of interest, from our blog:

...and without an IR receiver...