Simple IR demodulator

As part of a major project im doing for my advanced Dip
I need a simple Infra red trigger. I have the transmiter under control with a 555 timer at 38khz with other circuitry for a simple four bit code word.

What I need is a simple way of decodeing this I will have a detector with a lens that only passes 38kHz but I hear you can get special chips just for this purpose. Do I need it? Could I just use part of my 40 pin PIC to decode this? How?

Thanks for any help!
ken

hatman said:

As part of a major project im doing for my advanced Dip
I need a simple Infra red trigger. I have the transmiter under control with a 555 timer at 38khz with other circuitry for a simple four bit code word.

What I need is a simple way of decodeing this I will have a detector with a lens that only passes 38kHz but I hear you can get special chips just for this purpose. Do I need it? Could I just use part of my 40 pin PIC to decode this? How?

Click to expand...

You can get simple three pin IR receiver IC's, it's not cost effective to use anything else - you just supply power and ground, and the data comes out of the third pin. You then use the PIC to decode the recovered data.

Check my IR PIC tutorials!.

thanks mate i will have a scout around for them

hatman said:

thanks mate i will have a scout around for them

Click to expand...

You can get them from almost any old TV or VCR, only the really old ones didn't use them.