On 03/06/2011 16:17, Sean Breheny wrote:
> What is your opinion? Is IRDA going to be around for at least 5 more
> years or is it disappearing quickly?
>
It's never had much use and is an overkill for what you need. I thought=20
it was dead now (replaced by Bluetooth) though my phone and laptop have=20
it. The range on most is less than 30cm usually. Some are only 10cm,=20
though 5m is possible.

Use an 38KHz IR RX as used in TVs and set-boxes.
It can manage 1200bps with range of 5m to 10m

You use Manchester encoding and 38kHz clock. The very cheap IR RX gives=20
filtered decoded TTL. No complex SW stack needed as per IRDA. IRDA is=20
also a two way protocol, you only need one direction? (If you need two=20
directions just have IR LED and IR RX at both ends).

Virtually all the remote controllers are pre-programmed very basic PICs


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