From: Milton Aupperle <milton@outcastsoft.com>

Date: July 21, 2012 11:33:59 AM MDT

To: Astro_IIDC@yahoogroups.com

Subject: Re: [Astro_IIDC] Making your own GPUSB

Hi Bill;

On 21-Jul-12, at 11:12 AM, Bill Pearce wrote:

Milton,

Is there a diagram for making a USB version like the GPUSB? I might be missing something, but I just see reference to a camera connector cable.

No there isn't. This just builds off the GPIO pins on the Camera.  In fact, PGR can also emulate a serial port using those 4 pins too.

I have to give my friends GPUSB cable back after testing. So either I buy one, or make one. I have an Imaging Source Firewire camera.

The TIS cameras only have two trigger pins, so it isn't possible to do it. You'll have to go with a GPUSB.

Bill

HTH..

Milton Aupperle

Sent from my iPad

On Jul 21, 2012, at 12:43, Milton Aupperle <milton@outcastsoft.com> wrote:

On a side note. you can also build your own ST4 Guider board and then

use that instead of the GPUSB : cost would be less than $10 for parts.

http://www.outcastsoft.com/AstroImages/GPIOtoST4_InterfaceV3_MJA.png

The FireFly MV and Chameleon has 4 GPIO pins via a BM07B-SRSS-TB

connector,  so you could connect the BM07B-SRSS-TB to the ST4.

Then you have one cable to the camera, and the camera connects to the

ST 4 Port.

I use that all the time now. So I have one FW800 cable coming from my

Mac , which is connected to the Grasshopper 2 (it has 2 FW 800 ports),

and then I daisy chain a FW800 cable from the main imaging Grasshopper

2 to my guide camera (either a FW400 Flea or now my old Grasshopper 1

camera)  and then the ST4 port is connected to the guide camera. So a

single cable to 2 Cameras and the mount for imaging, guiding and mount

control. For me, this is especially important during the winter to

reduce the number of stiff cables I have to deal with (at -40°C all

cables are basically plastic rods).

See page 109 and 110 of the Astro IIDC manual for more information on

Hardware modifications.

HTH..

Milton Aupperle