On 12/20/11 4:56 AM, Pete Smith wrote:
> Recently, on a whim, I bought one of these
> <http://www.ebay.com/itm/12V-8-Channel-Way-Relay-Output-RF-Remote-Control-Switch-/130545242235#vi-content>,
> thinking it might be possible to use it to switch beverages at a point
> about 250 feet from my house. I knew, of course, that the little
> hand-held remote couldn't possibly reach that far, but thought maybe I
> could cobble something up.
>
> Looking at it, I'm impressed by the relay assembly, which seems very
> sturdily made. Is there any possibility, through the use of antenna
> improvements on both ends, that I might be able to get the range of the
> thing up to what's necessary, or would I be better off just modifying
> the relay assembly as a wired switch.
>
Velleman kits has a similar widget that I've used (with a wired control,
but they have an RF module that plugs into it).
WHat frequency is the remote at? 433 MHz? A small Yagi might do quite
nicely.
Or, couple the control signals onto your feedline. I've thought about
doing that for 2.45GHz 802.11 stuff. A tiny capacitive coupling would
be almost a short circuit at 2.4 GHz and wide open at HF.
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