Tal Go wrote:

> Hi All
>
> Can you give me a short explanation why schematic (1) is the correct one? 

Correct in the sense that a logic level will switch on/off the Bulb.

> and what happen when using schematic (2)? 

The source follows the gate minus the Vgs, so the gate would have to go 
to 27 volts to fully turn on the bulb.

>
>
> Thanks


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