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

Date: August 22, 2011 10:25:56 AM MDT

To: Astro_IIDC@yahoogroups.com

Subject: Re: [Astro_IIDC] Re: Guiding HW Addition

On Mon 8/22/11, at 8:00, milton_aupperle wrote:

Hi John;

Your right, it should have been NPN. I have corrected it in the final schematic layout here:

http://groups.yahoo.com/group/Astro_IIDC/files/Other/GPIOtoST4_InterfaceV3.jpg 

Note that you also need to connect the Cameras ground (Pin 5) to the ST4 ground (Pin 2) or the GPIO pins won't "trigger" properly, which has been added to the Version 3 layout.

I also included an image showing the final product (in a plastic enclosure box) mounted on the scope.

I still have testing to do, but so far it shaping up to work really well.

Thanks..

Milton Aupperle

Hi Milton,

Your interface description shows an 8 pins connector for the camera but the scorpion has a 12 pins connector. I assume it's just a matter of mapping the correct ping (IO0 to IO3, GND and +3.3v ).

Rodolphe

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