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 ...

There’s everything from a table of design requirements to quick but thorough explanations of nichrome wire and basic electronic theory. And then there’s the material consideration.

Can you build a powerful heater fan using Lego without melting it? In this experiment, we’ll put Lego to the test by using ...

When a length of copper or nichrome is heated, it lengthens due to thermal expansion. The wire is suspended between two posts and heated by a variac. A small weighted hook is placed in the middle of ...