[simpits-tech] Stepper Controller V2.1

[Gene Buckle]

> It is a single side layout - yes.
>
Good.  IT makes home assembly a LOT easier.  BTW, make your power setup a
bit similar.  Add a 7805 5v regulator so you only need a +12v input supply
as you can get the 5v from the regulator.

> Ive actually been looking on some chips that do serial communication,
> but they are a little of my scale in knowledge eg. when needed to
> calculate things with capacitates im f*cked. pure digital I can handle.
> 
> but Im thinking about PDL (programmable Device Logic) where you can burn
> a customized chip and have all the logic put into one chip, but thats
> way out in the future.... I need to brush-up on Boolean algebra for
> this....
> 
When you start looking at PDL or FPGA, you begin hunting rabbits with
rocket launchers.  If you use a PIC, you can redesign using a few
parts.  You'd only need the PIC (typically a 16 pin DIP) and the ULN
chip.  A current limiting resistor or two and a voltage regulator.  You'd
talk to this with *two* wires.  Data in and clock.

You'd write software for the PIC that would move the stepper depending on
what came over the SPI link.  Simple stuff. :)

g.


 -- 
"I'm not crazy, I'm plausibly off-nominal!"
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