using an electromagnet to OPEN a small door

[Sammy Taylor]

Hi,

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
geometry.

Cheap strong electromagnets seem to be of the U-shaped variety. Can I use
one
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.

sammy

 

[cbm5]

Hi,

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
geometry.

Cheap strong electromagnets seem to be of the U-shaped variety. Can I use
one
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.

sammy

Something wrong with just a normal solenoid?

 

[Robbie Mayhem]

Hi,

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 geometry.

Cheap strong electromagnets seem to be of the U-shaped variety. Can I use
one
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.

sammy

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.

Rob