We find it frustrating when battery operated consumer electronics don’t include a way to connect an external power supply. We try not to purchase disposable alkaline cells if we can avoid it, and this ...

HomeKit-certified devices are the slickest way to control your technology, but if you have any dumb technology powered by AA batteries, you can now remotely switch it on and off using your iPhone. The ...

This file type includes high resolution graphics and schematics when applicable. Editor's Note: Due to the comments at the end of this article, the author has agreed to change the circuit slightly to ...