Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

previous by date index next by date
previous in topic topic list next in topic

Subject: Re: RE : [Homebrew_PCBs] Unipolar stepper motor driver wiring

From: "Steve" <alienrelics@...>
Date: 2005-06-22

--- In Homebrew_PCBs@yahoogroups.com, "Phil" <phil1960us@y...> wrote:
> maybe this has been discussed but why not use mosfets instead of the
> NPNs? If you can turn them fully on they will run a lot cooler with
> little voltage drop.
>
> Also, how are you limiting current?
>

Would it be easier to just use the L297/L298 combo? Together they do
PWM limited current and half-stepping. They are bipolar internally,
but it's all inside the package.

Steve Greenfield