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Vesta SC1 p1
Vesta SC1 p2
Vesta SC1 p3
Troubleshoot

 

 

 

 

 

 

  

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Vesta SC1 p2

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The next 2 pages describe the modification as I initially developed it. Many refinements are possible such as the dead bug method, and track cutting instead of pin lifting. Have a look on the which cameras pages for more info.


If you are about to start work, may I wish you good luck, and I hope that the next few hours are fairly stress free!
Its probably best to start with the control logic chips. Make the circuit below up on a small piece of breadboard.


My thanks to Jim Talbot for the graphic. Alternatively Ashley Roeckelein's is here
Thanks go to Robert Rolf for adapting the original circuit to use the 74HC00 and for suggesting static protection on parallel port lines.
The switch is optional depending on whether short shutter speeds will be required again (planetary imaging).



If you would like to test out the logic for C at this stage it is:-

    Input A
    H L
Input B H H L
L H H


Also a connector to the PC's printer port is needed.

Take a 25 pin male D socket and a length of 2 core cable (eq loudspeaker cable). The signal lead is soldered to pin 2 (this goes to lead B on circuit diagram) and also take a ground eg pin 21. It is probably a good idea to put a small (eg 2.5 mm) plug on this lead and a socket on the camera.

 

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Copyright 2006 Steve Chambers. All Rights  Steve@pmdo.com

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