using an electromagnet to OPEN a small door

I'm building a small safe with an electronic strike. When a timer activates,
the strike releases. I want the door to pop open, and using a spring is
awkward. I thought a simple electromagnet might work, (activated just AFTER
the strike releases to prevent pre-load problems.) Can somebody suggest a
Cheap strong electromagnets seem to be of the U-shaped variety. Can I use
of these and a permanent magnet to repel each other? (I can't use two
permanent magnets because the pre-load on the strike can be enough to
prevent it from opening.)
Thanks for any help.
Reply to
Sammy Taylor
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Something wrong with just a normal solenoid?
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Most security equipment suppliers will sell this type of equipment (access control), at least they do in the UK. Suggest you Google and try and find a local supplier.
Reply to
Robbie Mayhem
Have you thought of just using gravity? Mount the safe with the back slightly raised and the door will swing open all by itself..Or fix a weight on a hinge over the door, which is pushed up as the door closes.
But yes, your electromagnetic and permanent magnet idea should work - just don't use ac and remember that they will be attracted to each other when the power is off..So you could have a door that springs open, and bounces shut and "locks" again..
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