Re: rs 233 to USB conversion

Stuart Heggie <stuart.j.heggie@...>

Joe, this is very useful information! I have W2000 on the laptop in the observatory and my system does not perform per the promise on the Wireless-N router box. BUT, it works so I'm okay. I didn't realize that the wireless-N card I bought for the laptop is not working as an "N" card. Rats! I'm using VNC Ultra to operate the laptop from the house computer - totally cool.

The good news (for them what are worried) is that my house computer is running Vista so I'm talking Vista<->W2000 and it is working. I was quite worried this would be a problem.

Also, I learned something about my new windows (glass/metal type, not computer OS). I put my Linksys router in the window sill to have a line of sight to the observatory and it didn't work at all until it was suggested that the window had a metalized layer to keep heat in the house and when I moved it down so that it had to "look" through the wooden walls, everything started working fine!


----- Original Message -----
From: Joseph Zeglinski
Sent: Sunday, May 20, 2007 5:17 PM
Subject: Re: [ap-gto] rs 233 to USB conversion

Hi Stuart,

Just need to add one warning. To get the Draft-N router range and power
improvement, the old laptop need a matching Draft-N NIC card. In order for an
old laptop to use the new Draft-N host adapter, it also must be running
WIN-XP, since these new cards aren't supported by Win-98/ME etc. If you don't
use XP or the Draft-N matching pair, you get the standard wireless G range
performance. Depending on where in the house the wireless router is situated
you might need a repeater, to get any decent range.

I bought one of the new Linksys Draft-N routers but had just a cheap
Wireless G type laptop host adapter. With the router at the front of the
house, my laptop lost signal as soon as I went out the back door to the yard.
I then set up a cheap "GIGAFAST or BLANC" wireless router which I got during
their $3 Boxing Day sale, and downloaded the new firmware which now allows it
to be used as a Repeater/Router. I parked it on a bookshelf in the back room,
and now I get about 70% signal strength all the way to the back fence about
100 feet beyond the house. The signal repeats just fine from the Linksys
wireless Draft-N version at the front, through several walls and doorways, and
the e house brick wall, to my observing site.

Also, Mizzou, if you decide on staying with serial cable, the official
range was about 50 feet. Any farther you need to use "shielded twisted pair"
cable to get 100 feet or a bit more. After that, you would need an old style
modem repeater for the cable. The other way, if staying with cable, is to do
the RS-232 to USB, then with shielded cables again, use a USB signal booster
I suggest you go with a wireless router, and possibly a repeater, if
necessary. The Draft-N "matched pair" version might eliminate the need for the
repeater, if you are running WIN-XP or (unfortunately) VISTA.


----- Original Message -----
From: "Stuart Heggie" <>
To: <>
Sent: Sunday, May 20, 2007 11:21 AM
Subject: Re: [ap-gto] rs 233 to USB conversion

> Mizzou - I'm no computer genius but this might be an alternative to messing
> with cables etc. I have an inexpensive laptop in the observatory, also about
> 100' away, and a wireless card in it which talks to the wireless router in
> my house attached to my desktop. It is "wireless N" and reaches the
> observatory fine. With Pulseguide you could run the mount from inside your
> house and not run wires.
> Stuart
> ----- Original Message -----
> From: mizzou156
> To:
> Sent: Sunday, May 20, 2007 10:12 AM
> Subject: [ap-gto] rs 233 to USB conversion
> Hello to All,
> I'm new to the ap 900 mount and astronomy. Mount works fine, but I
> now want to utilized the remote control software of my laptop. The
> laptop will be approximately 100ft away from the ap 900 gto, and I
> realize that I will have to do a rs232 to USB conversion. Is there a
> list of components and their manufacturers which will allow me to
> control the mount from that distance?
> I am not sure how all of the components will go together to make
> this work. I currently have windows xp ver. 2, but no rs 232 port on
> the laptop. Starry Night pro ver. 6 and pulseguide software
> Any help and direction will be appreciated.... Thank
> You,....Mizzou
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