Brian Scearce wrote:
>
> All the recent talk about AP circuits inspires me to ask: what is
> a good tool for a hobbyist to use for doing PCB layout?  APC offers
> Easytrax, is that a good product?
>
> I've finished my first project, a servo controller.  It mostly
> works, but there is some unreliability, which I suspect is from
> motor noise and power dips when motors start up.  _Mobile Robots_
> suggests that these problems can be solved by putting a capacitor
> from power to ground, but they don't specify the size.  Can anyone
> recommend a good size to start with?  If I had a big box o'
> capacitors, I'd do the experiment myself, but I'm just starting.
>
> Thanks,
> Brian
.01uF soldered directly to vdd_vss for noise the dips depend on to many
factors to guess just double what you have.Providing the supply can
charge this filter cap before the power up timer on the chip times out
you will be ok.As to the software try at least 3 or 4 before
investing.Alot of the satisfaction or dissapointment depends on your
previous experiences and expectations. Most vendors have demo's you can
download and try.