Re: A-Bus IR LED flicker

[nobody@xxxxxxxxxxxx (Dave Houston)]

"John O" <johno@#no^spam&heathkit.com> wrote:

>>
>> We emit IR in the 8-14 micron range but, as I understand it, it's the
>> optical filtering used that determines what wavelength an IR detector
>> responds to rather than the detector itself.
>
>A few months ago I was digging around the websites of manufacturers for IR
>receiver devices, both near-IR sensors and pyroelectrics, and I didn't get
>that impression. They seemed proud of their out-of-intended-band rejection
>specs. The narrower the detected band, the better. Maybe the A-Bus receiver
>is a POS that detects anything, though, who knows. Bottom line for me, if a
>CIR is going to detect 8-14 micron IR, it's defective, and impressively so.

You might be surprised by...

      http://chemistry.beloit.edu/BlueLight/pages/infrared.html