infrared learning

[koray_duran]

Hi Fellas,

I think to make an infrared code leaner and sender project.
It should learn any kind of infrared signals, keep it in eeprom and a later able to create this signal again.

How should i start ? I searched a lot but i couldn't find any real example for it. Most examples based on protocols but i want an universal one.

I wait your answers.

Thanks a lot....

[ckielstra]

You'll have to find the things that are in common for all infrared signals.

RC5/RC6 are the protocols used by Philips and have an amplitude modulation at 36kHz.
NEC uses a 38kHz frequency, and so all manufacturers use slightly different frequencies. For reception it is common to use a 38kHz Vishay TSOP or similar IR receiver module. You can buy these tuned at several frequencies, but the 38kHz type will see all common frequencies (but at limited range).

The TSOP demodulates the carrier frequency and outputs the binary data as a serial stream of '0' and '1'.

Now comes the part where your project starts: figure out a method to store the binary stream. A 'dumb' approach would be to store 1 second of data without processing. This works, but you'll run out of memory soon. Somehow you'll have to find a smarter method for storing the data...

See also http://www.lirc.org/

[Kerron]

Use hyper Terminal at 4800 baud rate connected to a IR 38KHz receiver module PNA4602 then click the remote in front the module and see the strings in hyper terminal for each button pressed. Most Commercial products Tv Remotes use 38KHz modulation at 4800 baud rate. The write youre code to detect each string for each button or unique parts of each string. I have done it before for a robotics project where i used a stereo ir remote to capture and decode the strings for each buttons and then relay it to the robot main processor with an interrupt

http://www.rentron.com/remote_control/pna4602m.htm

Kerron Manwaring