TNTBound wrote:well, i got the magnet in today and im disapointed. with the usb battery plugged in, i can easily pull it apart. its rated at 12v or 24v, so im guessing i dont have enough power going into it or the magnet just sucks. i ordered a different battery bank that has a specific 12v 3a output, so im hoping that will work better. if not, then i might just be ordering the mag lock on etsy.
You can always add a pulley or two to multiply the force of the rope.
In fact, it would be easy to double the force without using an actual pulley. Establish an anchor point for the magnet, and also attach the fixed end of the ratchet pulley to the same point. Run the free end of the ratchet pulley rope over to where you will be and through whatever ring/zipper pull/ etc and then back to the electro-magnet.
Another way that I use to minimize how much force I can apply to the anchor point is to tie a part of my body that is not as strong as my hands. My balls are frequently used for this. I can pull a couple hundred pounds with my hands, and jerk a lot more than that, but my balls are only good for 25 pounds or so and I am not too anxious to jerk with them. A collar around your neck would work as well.
R.Mc.