Subject: Re: rs232-controller switches
To: Jukka Marin <>
From: Manuel Bouyer <>
List: netbsd-users
Date: 05/21/2003 20:16:41
On Wed, May 21, 2003 at 09:11:13PM +0300, Jukka Marin wrote:
> On Wed, May 21, 2003 at 08:05:13PM +0200, Manuel Bouyer wrote:
> > I'm planning on building a 8-port power supply switch controlled by RS232.
> > Has someone some schematics for this ? Or just some chips refenrences
> > for UART would be a start.
> > I guess I need a UART which presents the data on a 8 output pins.
> > A bidirectionnal UART would be nice, so that the state of the switches can be
> > reported back to the host (in case it reboots, etc ...)
> You could do this with something like a PIC microcontroller (PIC16F628,
> for example).  It has one UART and up to 14 I/O pins.

Yes, someone at work suggested this too.
The problem is that this has to be programmed. We have the equipement at work,
but I plan to make the shematics available on web, and would like to
avoid PICs so that it could be build with minimal equipements.

Manuel Bouyer <>
     NetBSD: 24 ans d'experience feront toujours la difference