He calls the project “simple and cheap ... so [Giorgos] disassembled his door’s locking mechanism to see how he might be able to actuate the lock electronically himself.

But sometimes, the simplest solutions are the best. Take this simple stepper-powered cat door lock. For [Jason Winfield], the essential problem with his outdoor cat’s late-night demands for ...

like a fingerprint reader or door status sensor, but it’s an extra-tough commercial-grade lock with a built-in alarm and dead simple operation. For anyone who wants a reliable, predictable ...