On Tue, 18 Feb 2003 14:17:59 -0000, "Fergus Flanagan" <
[email protected]> wrote:
>Would anybody know of a motion sensor which would upon detection of movement transmit a signal to a
>receiver up to 100 metres away? The application would be say attaching the sensor to a cycle cover
>so that if anyone lifted the cover it would activate.
>
>Thanks for any help or suggestions Fergus
The X-10 folks sell an excellent motion detector, called the "eagle eye", and other variants. It is
an infrared detector, so needs only to be mounted NEAR the cycle, and will detect anyone
approaching. Runs for months on 2 AAA batteries. Sends (wireless) signal to receiver of your choice
- unit that alarms, or turns on light, or even starts
VCR. Usually available in sale deals for $29 or less. I have several, used with security camera and
VCR, and can say they are remarkable devices. That said, if you want to use one with a security
camera, I would advise against buying an X-10 camera, unless the area you wish to cover is well
illuminated at night. I have some of X-10's "night" cameras, and, frankly, they are useless at
night. They would only be any good in cojunction with motion detector operated floodlights. I
found Home Sentinal cameras with 0.1 lux sensitivity to be quite good with just the
illumination from a faroff street light, and they incoroporate built-in infrared LED's to
illuminate objects that are close. A web search for X-10 will garner more info, (and saturate
your system with pop-ups). One caveat - your distance requirements may be a limiting factor. I
think the X-10 motion detectors transmit up to thirty feet.