If you have a newer-model smartphone it probably comes with built-in wireless charging. There's even talk of wireless charging coming to electric vehicles in the future. Image someday having a home ...

The lifting electromagnet article I posted years ago (https://www.codrey.com/electronic-circuits/lifting-electromagnet-diy/) has been more popular that it should have ...

Transform copper wire, magnets and a battery into a simple electric train. Screengrab: Amazing Science For the kid expecting a Lionel model train set under the Christmas tree, unwrapping a pack of ...