Re: [CAD_CAM_EDM_DRO] Re: solution for optoisolator 3.3 or 5 volt

Hi Tom,
thanks for the info. I knew there was a bandwidth limitation but didn't know
it was that low. The stepper drives are not opto isolated. I'll try buffering
the PP output lines to drive the 6N136 cathodes. The separate supplies are
there already - totally isolated supply rails but common grounds. I need
isolation on the limit switches for noise immunity, and was thinking of using
TIL117 - speed is probably not an issue for this application, do you think
that's a good choice for the limit switches?
cheers,
Denis

On Monday 07 January 2008 22:39:33 caudlet wrote:

> Depending on the opto you choose and parallel port drive capability it
> may or may not work.
>
> First problem is that some ports can't turn on an opto that takes 15
/snip
> TOM CAUDLE
> www.CandCNC.com