RE: [CAD_CAM_EDM_DRO] unipolar stepper and 5804

At 11:01 AM 10/26/2007, you wrote:

>A quick search has lead me to the 4017 ­ or
>should I look elsewhere? And how do I
>limit? If I’m really going to count to 10K, I’m
>going to need to cascade these or something, right?

A 4017 is a good choice for counting steps, but
not for generating phases. To generate phases
what you need is called a Johnson
Counter. Common implementations involve 2-4 "D" flipflops.

The counter can be 4 CD4017s with "CARRY OUT"
tied to "CLOCK" and either 4 10 position rotary
switches or a multiplexor. Feed that output into
a 4 position NAND or AND gate.

It is a LOT of work to wire, and gets you 0-9,999 counts.


David G. LeVine
Nashua, NH 03060