significant other(s) know where you have hidden your important papers.
> I am thinking of using a discarded (good) electric controller from an
> electric blanket as a controller for a nichrome wire foam cutter. Can
> anyone gibve me a general idea how electric blankets work. Pointed in
> the right direction I can use a multimeter to check out the wiring and
> see if I can use it for controlling a foam cutter.
> There are two controllers. The controller I where I snipped off the
> insulated power wires has a regular two prong plug (2 wires) for the
> wall 115 Vac outlet. Inside the controller is a heating "zig zag" wire
> assembly next to a 3/4 turn moveable knob contact for adjusting the
> blanket's set temperature. I would believe the "zig zag" wire heats
> up to cut off the power supply at set point. This "zig zag" part is
> an independent 3 wire circuit but must be connected to the 115Vac
> power source somewhere.
> Since I don't have the blanket any more I am a bit puzzled as to how
> things are wired up. Also I can't imagine 115 Vac running though the
> blanket's embedded heating coils as any fracture will be a fire hazard
> or a shock hazard. Yet there is no transformer to step down the
> voltage and not much by the way of safety cut-offs in the controllers. >