speed signal and DRAC

[Shannen Durphey]

Peter D. Hipson wrote:
> 
> Actually it is not an A/D converter, it converts an analog input to a
> digital signal, however the output of the DRAC is not standard TTL, the
> input is frequency, not voltage sensitive. Most electronic speedometers
> could be driven directly (but inaccurately) from a magentic sender.
> 
> (FWIW, and A/D converter converts varying voltage to a digital value, if
> the DRAC did that then the output would not change unless your speed
> changed! <g>)
> 

Well, I think I've understood what you meant, but DRAC output doesn't
change unless speed changes.  I hope not, anyway.... ; )  

Is a signal of only one voltage level considered digital?
Shannen

> At 08:18 AM 6/24/99 -0400, you wrote:
> >> >>
> >diagram for the Syclone.  Oh yeah, the DRAC is an A/D converter as
> >well as a frequency converter.
> >Shannen
> >
> 
> Thanks,
>         Peter Hipson (founder, NEHOG)
>         1995 White NA Hummer Wagon