From: "doobisary" <tjp314@pacbell.net>

Date: October 2, 2009 3:08:49 PM MDT

To: Astro_IIDC@yahoogroups.com

Subject: Re: Scorpion experiences


As I said earlier, I found last night that the Scorpion video display wouldn't update if I used exposures longer than .533 ms, even though the times are not grayed out in the pulldown menu.  I think I got similar results with either of the fleas before joining the pins.


I've taken exposures as long as 15 minutes with the flea 640x480, which has the 7.4 micron pixels (and it was November in SW Utah, so it was below freezing outside).  The flea2 I have has 4.65 micron pixels, and I think the amp noise gets pretty bad after 5 minutes, even on cool nights (I've not used it when it's been below freezing, though!).


My gut feeling is that the Scorpion will do very well for long exposures, especially if it's cool out.


-Tim.


--- In Astro_IIDC@yahoogroups.com, Alan Friedman <alan@...> wrote:


Thank you Milton and Mark.


What is the longest exposure the PGR cameras can be set to without the  

GPIO modification?


thanks,

Alan



On Oct 2, 2009, at 4:12 PM, Milton Aupperle wrote:


Yes, on this list.



Search for "GPIO" or "long exposure PGR" on the group list and  

you'll find a a bunch (up to 35) of messages on it.


Starting at around messages:


2595


http://tech.groups.yahoo.com/group/Astro_IIDC/message/2595


HTH..


Milton J. Aupperle



On 2-Oct-09, at 1:56 PM, Alan Friedman wrote:


!



Is there discussion/instruction anywhere for connecting the GPIO0  

and GPIO1 pins on the Scorpion to enable long exposures? I've never  

soldered anything outside of copper plumbing pipe and that was many  

years ago.


thanks!

Alan


Tim,


I soldered the 2 wires on the rat-tail I was provided with  

together (& even followed Milton`s instructions for making my own  

Peltier cooler) but haven`t done any time exposures with my Flea 2  

yet. With 2 of those 1600 pixel PGR cameras available (perhaps  

some of the other 1300 pixel ones) I`d have had to beat Alan to  

the punch & I only remembered my niece after Peter`s post! Last  

time I spoke to her she was between addresses so I didn`t follow  

up the option.


Mark.

On 03/10/2009, at 3:40 AM, doobisary wrote: