I have a firedoor on my property that is always being jammed open and hence no use as a firedoor.
I wish to design something that allows people to leave the door open for a while but then automatically close it after say 15mins.
I was thinking of using an always on electro magnetic door holder - then cut of the power briefly to allow the door to close naturally under the spring mechanism it already had installed.
So I have ordered these two items:
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=120791910232#ht_500wt_1287
http://www.ebay.co.uk/itm/220759492048?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
But as it is I think the door will remain open all the time except when someone presses the red button.
How can I make it close after say 15mins (or just every 15mins - doesn't have start the time when the door is opened - just close it regularly as a safety precaution)
I wish to design something that allows people to leave the door open for a while but then automatically close it after say 15mins.
I was thinking of using an always on electro magnetic door holder - then cut of the power briefly to allow the door to close naturally under the spring mechanism it already had installed.
So I have ordered these two items:
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=120791910232#ht_500wt_1287
http://www.ebay.co.uk/itm/220759492048?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
But as it is I think the door will remain open all the time except when someone presses the red button.
How can I make it close after say 15mins (or just every 15mins - doesn't have start the time when the door is opened - just close it regularly as a safety precaution)