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Basically the ST4 is a hard wired form of control for the Telescope e.g. 1 wire controls 1 direction, 4 wires 4 Directions with the #909 clone, but ultimately the signal is converted back to a RS232 type command for the Autostar Controller to deal with. Where as the method I am using connects directly to the AutoStar Controller without the need for a GPUSB and a #909 Clone and it controls directly with RS232 Commands to the controller and it only requires a com port and a lead. The RS232 Leads (#505) for the controller are easy to make and can be bought on Ebay.
Cheers
Tim
Last edited by tbothy; 06-04-2009 at 01:22 PM.
Reason: Correcting
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