Homebrew PCBs

--- 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