Homebrew PCBs

On Fri, 02 Dec 2005 19:40:20 +0100, lcdpublishing  
<lcdpublishing@...> wrote:

>
>
> BTW, is this isolator needed for the same reason I needed one on my
>
> spindle driver that fried my computer last year?


Yea, more or less. it isolated the thermisotor and pot and supply from  
mains, which isn't all designed to be at that potential, 'specially the  
thermistor. Often it will be a phototriac which does the firing of the  
triac the right way without hassle at a zero crossing.

ST