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Subject:	Re: [geda-user] Stepper driver issues
From:	"Chris Smith (space DOT dandy AT icloud DOT com)" <geda-user AT delorie DOT com>
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Date:	Tue, 30 Jun 2015 09:17:10 +0100
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Reply-To:	geda-user AT delorie DOT com

Hi Rob,

I notice you’re using a PIC16F1937, which has an onboard LDO regulator.  These usually require a bypass capacitor on one of the VCap pins, but you haven’t got one and you’ve allocated two of the VCap pins to I/O functions.  This will probably cause issues — you’ll need to check the data sheet and review your configuration bits.

Regards,
Chris
—
Chris Smith <space DOT dandy AT icloud DOT com>


> On 29 Jun 2015, at 18:28, Rob Butts (r DOT butts2 AT gmail DOT com) <geda-user AT delorie DOT com> wrote:
> 
> I have decided to re-layout and re-fab my stepper driver test board.  I'm attaching the pdf schematics.  Is there anything I need to be especially careful about?
> 
> Thanks
> ​
> <stepper-driver-2-pg1.pdf><stepper-driver-2-pg2.pdf>

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