Re: Second Zone Remote

[nobody@xxxxxxxxxxxx (Dave Houston)]

RickH <passport@xxxxxxxxxxxxxxxxxxxxx> wrote:

>On Feb 11, 9:42 pm, J Miller <reply@here> wrote:
>> Here's what Devon Tech support pointed me to:
>>
>> (not from SmartHome, but the same product)
>>
>> http://www.smarthome.com/8045i.html
>>
>> I'm staying away from the X10 thing, as over the years, I've found X10's
>> stuff like this to be of poor quality.
>
>Slick, I wonder how the battery-substitute transmitter "sees" what IR
>signals the remote is trying to send so it can echo them out in RF?
>Is that waveform passed electrically through the batteries in all
>remotes?  Or is there a sensor you need to hook up that sees the
>remotes IR emitter and is wired back to the battery-substitute unit?
>However it works its a pretty cool idea to substitute the battery with
>an RF unit.

Everything that switches puts out a small (or sometimes large) amount of RF
(which is usually considered EMI). The transmitter circuitry senses this
from the IR emitter circuitry, amplifies it, and sends it as RF. It's an
ingenious idea.

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