re: comments on driver circuits

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Harvey White <madyn@i...>
wrote:

> On Thu, 20 Nov 2003 06:20:28 -0600, you wrote:
>
> <snip>
>
> >Best regards
> >Hans Wedemeyer
> >PS This kind of crap distracts me and just delays my projects....

I want

> >to finish the EAGLE layout for the L297/L298 and perhaps a 5 Amp

driver...

>
> I found it helpful to put a few LEDs in the circuit to enable me to
> know how the circuit is doing, a bipolar red/green one across the
> motor coil leads. I also found the chopper current sense to be

fairly

> sensitive to spikes, so I added some optional filtering in the

current

> feedback loop from the sense resistor to the op amp. Those were
> useful as well. I also added some power led indicators where

needed.

> Barely fit on the 3 by 4 inch single sided layout I used, but did

fit.

>
> Harvey

Hi Harvey,

can you elaborate on the filters ?

Dave