Re: Converting a US 300MHz RMS18/MS12A motion sensor to transmit at 433.92 MHz

["Stefan van der Horst" <stefan@xxxxxxxxxx>]

Dave

One more thing, the purpose was to be able to use the US versions in Europe
main land. Not vice verse.



"Dave Houston" <nobody@xxxxxxxxxxxx> wrote in message
news:43c6cc5b.105778578@xxxxxxxxxxxxxxxx
> One correction: The US frequency is 310MHz.
>
> You also should be aware that the FCC severely restricts the power that
> can
> be used by these devices. CE power limits are much higher. So while you
> might save a bit (assuming your time has no value) this way you'll end up
> with much less range than with the European versions. See...
>
>     http://www.radiometrix.co.uk/apps/apnt102.htm
>
> A simpler approach might be to merely disable the 310MHz circuitry and add
> a
> 433.92MHz RF transmitter module. There's a small 4-pin transmitter widely
> available (Velleman, CrownHill, etc.) that will work quite well and has a
> higher power output than the US X-10 devices.
>
> I've done the reverse, adding a small 310MHz transmitter to the DigiMax
> 210
> RF thermostat sold by X-10 Europe.
>
> "Stefan van der Horst" <stefan@xxxxxxxxxx> wrote:
>
>>Forgot to mention this is an X10 device
>>
>>"Stefan van der Horst" <stefan@xxxxxxxxxx> wrote in message
>>news:dq6f7k$i30$1@xxxxxxxxxxxxxxxxxxxxxxxxxx
>>> For those who are interested in modifying a US RMS18/MS12A to transmit
>>> at
>>> 433.92 MHz into I have written an tech doc for the modification. It is
>>> located at:
>>>
>>> http://project.actopus.nl/X10/rms18toms13/Index.html
>>>
>>> regards
>>> Stefan
>>>
>>
>