"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."
'Cause the original schematic was configured with NPNs, 'cause MOSFETs
weren't included in alternatives and 'cause I lack experience in
substituting NPNs for MOSFETs. :) If you have a suggestion, please post a
pic, I'm a visual person.
"Also, how are you limiting current?"
See, this is something else I need more information. I have no idea what
you mean by limitting current.
I started with a schematic from Aaron's site which he had gotten from
someone else. I'm just trying to make the circuit stable to use the 24V
steppers that I happen to have on hand.
Robert
:)
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If you can turn them fully on they will run a lot cooler with little voltage
drop."
'Cause the original schematic was configured with NPNs, 'cause MOSFETs
weren't included in alternatives and 'cause I lack experience in
substituting NPNs for MOSFETs. :) If you have a suggestion, please post a
pic, I'm a visual person.
"Also, how are you limiting current?"
See, this is something else I need more information. I have no idea what
you mean by limitting current.
I started with a schematic from Aaron's site which he had gotten from
someone else. I'm just trying to make the circuit stable to use the 24V
steppers that I happen to have on hand.
Robert
:)
Be sure to visit the group home and check for new Links, Files, and Photos:
http://groups.yahoo.com/group/Homebrew_PCBs
If Files or Photos are running short of space, post them here:
http://groups.yahoo.com/group/Homebrew_PCBs_Archives/
Yahoo! Groups Links