Re: Opto / relay recommendation

Thanks Alan,

Sounds like this would be pushing my limited electronics knowledge.

Rab

--- In CAD_CAM_EDM_DRO@y..., Alan Marconett KM6VV <KM6VV@a...> wrote:
> Hi Rab,
>
> It sounds like you could use a relay driver approach. use a 7404
IC to
> drive a TIP120 transistor through a 2K resistor. the valve is
connected
> to +24V, and the darlington transistor "pulls" the other lead down
to
> ground. Much like a simple coil driver used in an inexpensive
unipolar
> driver (MaxNC board comes to mind). Be sure to put a diode across
the
> valve's coil for back EMF.
>
> An opto-isolator could be used instead of the IC if desired.
>
> HTH
>
> Alan KM6VV