From: Rodolphe Pineau <pineau@rti-zone.org>

Date: August 22, 2011 8:09:27 PM MDT

To: Astro_IIDC@yahoogroups.com

Subject: Re: [Astro_IIDC] Guiding HW Addition

On Mon 8/22/11, at 14:03, Milton Aupperle wrote:

Hi Rodolphe;

It likely could do it, but given that the Scorpion cameras are  

obsolete / out of production and that PGR has settled on the Hirose 8  

pin connector with 4 GPIO pins, I'm pretty reluctant to do it.

However I do have a suggestion on how to work around it without any  

software changes.

Basically add a physical switch to outside of the box. Connect I/O 0  

and I/O 1 (or I/O 2 and I/O 3) GPIO pins  to each end of the physical  

switches contacts.

When the switch is closed, then two pins are connected and can be used  

for long exposure control. You should also unplug the ST4 port too in  

case it interferes too.

When the switch is open, then the pins are not connected and could be  

used to control the ST4.

I realize that doesn't allow you to do both at the same time, but it's  

pretty unlikely to be using 5+ second exposures for guiding.

HTH..

Milton J. Aupperle

Thank you Milton.

I understand your point of due and will do the trick with a switch to go back and forth between the 2 when needed.

Regards, Rodolphe

--

|        Rodolphe Pineau    RTI-Zone        |

|         http://www.rti-zone.org/          |

|   Robotics / Unix / Mac OS X / Astronomy  |