I'm planning how to build/design the side panel door for my case mod. I was thinking of using an electromagnet + magnet to close/open the door. Place a magnet in the door and an electromagnet (off by default) in the case with repelling poles facing each other. With no power to the electromagnet, the magnet would be attracted to the magnet - keeping the door closed. But, when power is applied to the electromagnet, it would repel the magnet - pushing the door open. I only want power applied to the electromagnet while the button is pushed. Will this work? If so, where can I get an 12 volt electromagnet that I can connect to my PSU? Ideally, I'd like to use one that's between 1/2" and 3/4" diameter. I was thinking of using a rare earth magnet for the magnet. I believe I'll need a momentary switch to only apply power while it's pressed. I located one electromagnet that looks like it would do the job. Holding Value: 6 Part Number: ER1-071 Diameter: 3/4" Length: 1-1/4" Thread: 10-32 Volts: 12 Watts: 1.44 Weight: 1.7 OZ Price: $29.00 Thoughts? Thanks for any help/advice.
I'd use a solenoid to pop the door open instead. Magnet to hold the door shut, then a push type solenoid to pop it open.
i second the solenoid idea. But you could also find yourself a 12V relay and take out the electromagnet part. They can be quite powerful...and small too.
I agree with the solenoid idea. An electromagnet has one major drawback; it isn't ideal. By this I mean when it's off the core material (soft iron is best) retains some polarity so could continue to repel the permanent magnet.
