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Re: Simplified Computer Rotor Control?



The FOD-Track board is probably one of the simplest interfaces that will do 
what you want...  It's desiged to work with the Yaesu az/el rotors, but can 
easily be used with your separate units.  You simply provide 5 VDC to the 
rotor position pots (simple voltage dividers) and feed the resulting wiper 
voltages to the appropriate FOD-Track board inputs.  (If you aren't using it 
with the 5400 or 5500 control box, you will also need to supply the 
interface itself with 12 - 18VDC.)  Your computer compares the voltage to 
the desired antenna position values, and then the interface switches the 
motors R, L, U, or D until the values match.  The board is available for 
about $5 from FAR Circuits, and all-new parts will run less than $30.  The 
documentation, schematic, parts list, and board layout are all available 
from the AMSAT download site, as well as the FOD-Track software (it's also 
compatible with most popular tracking programs).

George, KA3HSW


----- Original Message ----- 
From: "hasan schiers" <schiers@netins.net>
To: <amsat-bb@amsat.org>
Sent: Thursday, August 25, 2005 7:02 AM
Subject: [amsat-bb] Simplified Computer Rotor Control?


>I have  G-800SA Yaesu Azimuth and G-550 Yaesu Elevation rotors.
>
> I have no interest in spending a fortune on a 5500 and its (non-supplied)
> serial interface.
>
> Could someone point me to articles on the Web or commercial sites that 
> show
> inexpensive interfaces that I might be able to use with the above rotors. 
> I'm
> assuming that one could tap off the pot voltages at the rotor control 
> heads
> and feed them to an interface. This should not be all that difficult to 
> do,
> and I assume has been offered as a less expensive alternative to the 
> internal
> interfaces.
>
> If someone has keywords that will provide useful url's I'd be happy to 
> google
> them. I just thought I'd check here first if someone has already done the
> sifting.
>
> 73,
>
> ...hasan, N0AN
> ----
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----
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