Some scrot stole my 2 drills after I accidently left the remote
controlled garage door open.
Has anyone got an idea how I could make a wireless door open warning
device connected to a lamp in the house? Preferably using ready made
Does any company make such a device?
Presumably there's a power link, at least for the door.
I think you can get X10 door contacts which will signal
back across mains and possibly RF versions too. This
could be used to operate an X10 switched light in the
house. You could do the same with a motion detector in
the garage, which would add a bit more detection over
just the magnetic contents.
[email address is not usable -- followup in the newsgroup]
I use x10, x10 can often be turned on by built in 3 button garage door
openers, have remote keychains, remote control, when I pull in the
garage the x10 motion light turns on outside and inside lights one
sensor triggers 3 more, its a system you can expand on even to operate
Thanks for that, but I also need a wireless link from the door to the
house as the garage is detached.
Adapt a wireless doorbell. Use a similar circuit to that suggested,
have a magnetic contact on the door and have it hooked up to a
relay. Connect the bell push to the common and normally closed
contact. When there is power through the magnetic contact due
to the door being closed, this will energise the relay and pull the
normally closed contact away. When the contact opens your
power to the relay will be lost, the relay will flick back and join
the two terminals of the doorbell. It's a cheap and easy solution
using inexpensive products. For the small circuit with the relay and
megnetic contact you can use a small mains adaptor.
This will not ensure you have secured the garage, but will warn
when the door is open.
Could you not use the same type of module as used to operate the door but
wired to relay that works the lamp, instead of to the door opening
mechanism? That way, whenever you operate the door, you also switch the
lamp. Of course, to allow for lamp failure, you ought to have it toggle
between two lamps - one for door open and one for door closed.
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