https://stream.echo6.co/videos/watch/96aec28c-a3eb-4105-8b66-ecc8efaa7824 I'm guessing these are designed for automatic release of locker doors like in the Amazon locker system. They operate at 12V and physically push the door open instantly when triggered. The coils are only rated for brief pulses, and draw such a high current (2-4A) that any microcontroller based circuitry should be designed with separate tracks for the coils and logic from the PSU. To protect the switching transistor against the current spike caused by the collapsing magnetic field when turned off, a diode should be wired across the coil with the band pointing to the positive rail. The keywords to find these on eBay are:- electric magnetic door lock Price will be around £$€7 Here's the manufacturer's website:- https://www.doson.com.tw/index.php?mod=&lang=2 These could also be used as a controlled drop mechanism in some applications. If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:- http://www.bigclive.com/coffee.htm This also keeps the channel independent of YouTube's advertising algorithms allowing it to be a bit more dangerous and naughty. #ElectronicsCreators Fri, 17 Apr 2026 08:56:21 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://stream.echo6.co https://stream.echo6.co/client/assets/images/icons/icon-512x512.png https://stream.echo6.co/videos/watch/96aec28c-a3eb-4105-8b66-ecc8efaa7824 All rights reserved, unless otherwise specified in the terms specified at https://stream.echo6.co/about and potential licenses granted by each content's rightholder.