InfraRed RC5 decoding without reciever

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How can I decode RC5 infrared signal without special reciever (i.e. SFH 508-36, TSOP1836 etc.)? Just with photodiode?

Reciever eats more than 1 mA all the time. It's critical, because my tiny device works with one 2025 3V Li cell, and must sleep in deep most time.

Thanks.

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IMO without an IR receiver module which provides a bandpass filter and gain, the best you can do with an IR diode alone is maybe 6 inches of range and without sunlight.
A software bandbass filter is feasible but would take a lot of computing horsepower.

I think you're going to need some sort of sleeping strategy attuned to the lead-in bit time of IR and hope the IR message is repeated several times.

Or a bigger battery

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Have you digested all the information in the Atmel app notes?

Quote:

AVR410: RC5 IR Remote Control Receiver (10 pages, revision B, updated 5/02)
This Application Note describes a receiver for the frequently used Philips/Sony RC5 coding scheme

AVR415: RC5 IR Remote Control Transmitter (5 pages, revision A, updated 5/03)
In this application note the widely used RC5 coding scheme from Philips will be described and a fully working remote control solution will be presented. This application will use the ATtiny28 AVR microcontroller for this purpose.

IR or any other type of receiver (e.g., RF) is tough to do truly low power-->>something<< has to be awake to watch for the start of a new frame. And that takes power.

Or you have to be like an RFID tag?

Lee

You can put lipstick on a pig, but it is still a pig.

I've never met a pig I didn't like, as long as you have some salt and pepper.

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I once implemented a (Goertzel-based) 38kHz demodulator from an IR
photoresistor; it ate up most of a 9.6MHz ATtiny13, presumably quite a
bit more than 1mA. I got maybe 2 feet of range, but no it wasn't long-distance.