Homebrew PCBs

>A thermocouple is a tiny junction of two metals that makes
>part of a highly accurate thermometer that can stand -very- high
>temperatures.

Commonly used in gas appliances like water heaters and furnaces in 
direct contact with the pilot flame. The voltage they output is used 
to control gas flow as long as there's a flame (sufficient heat). No 
flame...No gas...No danger. It's the second thing to check when these 
things stop working. Home Depot sells the type I'm referring to for 
less than $20.00 IIRC. I've replaced a few in my lifetime.

--- In Homebrew_PCBs@yahoogroups.com, Steve Greenfield 
<alienrelics@...> wrote:
>