Dale Botkin wrote:
>
> On Tue, 23 Jan 2001, Mitchell D. Miller wrote:
>
> > > I believe UART preceeded processors. The first one I used was the
> > > AY5-1013. Required +5 and -12V.
> >
> > Say ... isn't that the part the Radio Shack used to sell?  Seems like I used
> > that same uart years ago, but not in the 70's.
>
> Duuuuh.  Meant to say, "there was also an AY3-1015".

Yeah. The nice thing about the 1015 was that is was single supply.
You could go from 1013 to 1015, but not the other way.

I build a robot controller (anyone remember the Minimover? 6 steppers
controlling base, shoulder, elbow, wrist left, w right, and grip)
 with nothing more than the AY5-1015 and
a bunch of latches for the stepping motor phases. Upper nybble choose
latch, lower nybble was motor phase pattern. Pascal software drove it,
and got position feedback from 10 turn pots connected to an ADC808.

So who need PICs <G>?

Robert

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