I have just added an IR beam across the path of the door, for an extra bit
of people/animal safety and to let me know when the tail end of my car is
just clear of the door. One of these - Ebay item 170185660628.
It should work with pretty well any system, as it works on ac/dc 12v to
240v, making or breaking a relay when the beam is interrupted over a maximum
door width of up to 5m using a reflector at the far end from the sensor -
and about half the price of some of them.
I set it at the same height as my cars tow ball, so I can watch its LED as a
means to confirm when the car is clear of the door -which is as near as
matters the advised mounting height for such things anyway.
I have BTW in the recent wet weather found a minor disadvantage with roller
doors v canopy panel type doors - if the door is wet when it is opened, they
drip incessantly once rolled up inside the garage. I also notice a quite
wide and drafty gap along the width of the top of the door just below the
powered roller - between door and the surface the roller is mounted upon. I
have just gone to some trouble to seal up some of the other drafts, so I'll
need to look at finding an effective way to seal this one too. Not much
point in a well sealed and insulated roller door, if it leaks drafts all the
way along the top, is there?
- posted 12 years ago