"Jim Thompson" wrote in message news: snipped-for-privacy@4ax.com...
Frustrated with IR repeaters that use RF links (like Terk)... ambient
> RF noise too high for reliable operation :-(
>
> It occurred to me that since I have a central "Great Room"
> architecture, that makes for a wide open optical shot across great
> expanses... as much as 60' per link... so a purely optical repeater
> should work nicely... pick-up the IR from a remote and blast an LED
> with an Ampere ;-)
>
> Ceiling heights of 12' to 16' and door openings of at least 8' means I
> don't have to contend with people getting in the way.
>
> So now I need pointers on how to collimate/focus an IR beam so it
> doesn't spread out too much at 60' range.
>
> Ideas?
>
I use a 4" length of 20mm black delrin . Drill right through with 4mm drill. Drill one end with 5mm to a depth of 7mm nominal to fit the led in with a drop of super glue..