[Techgenie]’s handheld hot wire foam cutter is a simple build based on a single 18650 and a piece of nichrome wire. While this is probably not the most Earth-shattering hack you’ll see today ...

While there are all sorts of ways to build a hot wire foam cutter, this design from [jasonwinfieldnz] is both interesting and imitable. If you don’t already know it, nichrome wire is nifty stuff ...

To make the signs, she first draws out the design on the foam board, then cuts the foam with a hot wire foam cutter, paints it, and then hangs the sign in the store. Signs can take hours or weeks ...