Including error checking and/or error correction is a good idea.  Test  
your scheme by waving the receiver out in the sun with a shade tube  
and see what kind of erroneous slip through.  You can automate the  
testing by mounting the receiver on a "shake" platform.
Michael

> On Oct 19, 2008, at 11:56 AM, Dr Skip wrote:
>
> Thanks all for the advice. Yes, the intent wasn't to have it  
> directly into the
> sun, but to have a short shade/tube on it to prevent such. With that  
> taken care
> of, my concern would be for ambient sunlight, reflection, or even  
> modulation of
> a reflection from leaves or passing vehicles. Is that something to  
> worry about,
> or can it be tackled with something like a preset 'header' pattern  
> in the
> transmission or a check bit or two?
>
> -Skip
>
>
>> These sensors already have a black IR-pass filter as the case  
>> material - the sun has plenty of NIR
>> content so filtering won't help much  - the only solution is to  
>> shade the sensor so direct sunlght
>> doesn't hit it.
>>
>>
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