re:Camtronics 18v limit was Re: Re: Stepper motor from Sherline?

Dan Mauch answered:

>For the 2A drivers I restricted the max supply to 18VDC s only
>because I use a 7805 for +5. With 18VDC input the 7805 gets warm
>with 24VDCV it gets very hot. I have run the 2A drivers up to 38VDC.
>But I used a separate 5vdc supply for the logic. You could also use
>a large but inefficient dropping resistor in series with the 7805
>input and use 24VDC.

Dan,

Another choice is to "cascade" a 7824 (or 7815, 7812) which has a
higher input voltage capability, and use its' output to drive the
7805.

Hope this helps.

Ballendo