>Hi. I have a couple of Oregon Scientific weather monitors. These devices
>display the current temperature on up to three remote sensor units. They
>operate on 433 MHz wireless, have a range on the order of 100 ft, and are
>inexpensive (a remote module costs about $25 retail).
>
>Does anyone know what they use for the communications? I'd like to gather
>data from little devices spread throughout my house, and think this might be
>an ideal way to transmit it.
>
>TIA,
>Roderick Mann               rmann @ latencyzero.com.sansspam

>
>     > I have the same devices.  I also thought of asking the same question.
>     > If no one writes in, and no one is brave enough to take theirs
>     > apart maybe I'll have to do the deed sometime.
>
>     I actually did take mine apart, to no avail. I could not determine by
>     looking at the tiny hardware inside what they used. It almost seemed like
>     they have a uP with the functionality built-in.
>
> Sounds similar to the assorted (cheap, probably hackable) X10 wireless
> transmitters.  They have one that connects to a db9 serial port (and
> essentially fits in a DB9 shell) and sends info to a receiver that does the
> on/off stuff for the full complement of X10 (powerline) receivers (so it's
> probably got at least one byte worth of transmitted data?)
>
> These are presumably FM-modulated (by digital signal) simple oscillators - I
> remember seeing an supposed video modulator using nothing other than a 7407
> (hex inverter) cleverly connected to appropriate caps and resistors, and
> I've heard you can fiddle with things like high-pass filters and an antenna
> on your clock oscillator if your transmit frequency is an appropriate
> harmonic of your clock frequency...
>
> BillW
>
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>
> Hi. I have a couple of Oregon Scientific weather monitors. These devices
> display the current temperature on up to three remote sensor units. They
> operate on 433 MHz wireless, have a range on the order of 100 ft, and are
> inexpensive (a remote module costs about $25 retail).
>
> Does anyone know what they use for the communications? I'd like to gather
> data from little devices spread throughout my house, and think this might be
> an ideal way to transmit it.
>
> TIA,
>
> ------------------------------------------------------------
> Roderick Mann               rmann @ latencyzero.com.sansspam
>
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> commercial email.
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