Re: Jog wheel

[j riach <jamie-at-riach.com>]

On Tuesday 04 June 2002 12:24 am, you wrote:
> ----- Original Message -----
> From: "William Scalione" <scalion-at-dellepro.com>
> To: "Multiple recipients of list" <emc-at-nist.gov>
> Sent: Monday, June 03, 2002 3:49 PM
> Subject: Re: Jog wheel
>
> It does not have to be that big of deal.
> Less than 5 bucks will get you a "PIC" or Atmel uController that would
> easily
> do this. All you'd need to do is add a MAX232 TTL<->RS-232 Level converter
> for $1.50 and you'd be set add all the switches indicators and handwheels
> you
> want quite cheaply.
>

> Marc Christensen
the rs-232 interface is even more at risk than the parports we use?
in this case one of the fddi usb to parallel adapter chips (looks to a 
peripheral like a fifo buffer ) and some logic would be good. But how 
would servicing the usb stack affect performance ? on a windows system there 
is a noticeable drop in response even if my scanner and camera are only 
connected and sitting idle.