The Shoestring Astronomy Store |
Guide Port Interface Products |
| Thanks to webcam technology, it is now easy and much less expensive to set up your own autoguiding system. You'll need a PC or laptop computer,
a webcam or other video device, autoguiding software, and some sort of interface so that the computer can talk to your telescope mount
and direct it's motion. Of course, you will also need a telescope mount that is capable of receiving tracking correction commands.
To use our products shown below, your mount will need an |
| The GPUSB guide port interface adapter plugs directly into a USB port on your computer or a USB hub attached to your computer. Using an RJ-12 cable, the adapter connects to the guide port of your telescope mount. This guide port interface uses optocouplers to electrically isolate the computer from the telescope, eliminating a possible source of electrical interference. This interface adapter requires no external power source since it receives its power via the USB cable. More information can be found by clicking here to view the User Manual. |
| The GPINT-PT guide port interface adapter plugs directly into the parallel port of your computer. Using an RJ-12 cable, the adapter connects to the guide port of your telescope mount. This guide port interface uses optocouplers to electrically isolate the computer from the telescope, eliminating a possible source of electrical interference. This interface adapter is small and require no external power source. It uses the D4, D5, D6, and D7 lines of the parallel port. Furthermore, all of the parallel port signals are routed through the adapter to another DB-25 female connector so you still have access to all the parallel port signals. If you have a modified webcam or a DSLR shutter control cable that needs to be controlled by some of the parallel port signals (D0, D1, D2, or D3), you still have access to them! More information can be found by clicking here to view the User Manual. |
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We had one case where a customer used an improperly wired cable with his Celestron Advanced Series Goto mount. This resulted in damage to the electronics in his mount, as well as damage to the interface adapter. We can't stress enough the importance of using a properly wired cable. If you choose to make or buy your own from another source, please be sure it is built per the description shown in this document. |
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AstroArt |
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Astro IIDC (Macintosh) |
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AstroVideo |
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Autostar/Envisage by using Guidestar LX200 Software Emulator http://www.skyinsight.net/wiki/index.php/GuideStar_LX200_Software_Emulator |
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Equinox (Macintosh) |
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GuideDog |
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Guidemaster |
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K3CCDTools |
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MaxDSLR |
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MaxIm DL |
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MaxIm Essentials |
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MetaGuide |
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PHDGuiding (Windows) |
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PHDGuiding (Macintosh) |
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wxAstroCapture (Windows and Linux) |
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| NOTE to Losmandy Owners: If you have a GM-8 or G-11 without the Gemini box, you will need the GPUSB or GPINT-PT. If you are using the NEW style Gemini box (the NEW style has a circular DIN connector to connect to the motors), then you will need the GPUSB or GPINT-PT. If you are using the OLD style Gemini box (the OLD style has a modular RJ-45 connector to connect to the motors), then you will need the GPUSB-AH. |
| NOTE to Meade LX-200 Owners: The diagram shown in the manual for the older "classic" Meade LX-200 makes it appear that the CCD port does not follow the ST-4 standard. The CCD port is indeed ST-4 compatible, but Meade chose to use a nonconventional pin numbering scheme, and did not provide a diagram that shows how the pins are physically numbered. |
| We also offer cables and other accessories that are known to work with the GPUSB and GPINT-PT products, taking more of the guesswork and locating parts off your hands. |
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| Several customers have modified the Vixen DD-1 handcontroller in a manner similar to that for the EQ handcontrollers. You can use the EQ documentation, our GPKIT-EQ, and this picture to perform this modification. However, because of a difference in the internal electronics, the Vixen DD-1 modification must use our GPUSB-AH guide port interface adapter. The GPUSB and GPINT-PT will not work. |
| The Takahashi TG-SE handcontroller can be modified by adding relays as shown in this schematic. |
| If you don't own one of these mounts, don't give up hope. Almost any handcontroller can be modified by adding relays in parallel with the directional pushbutton switches to add an autoguide port. See our Handcontroller Modification Guidance document for suggested schematics and part numbers. |
| GPINTCheck and GPUSBCheck by Shoestring Astronomy |
| GPINTCheck and GPUSBCheck are simple, free software applications that you can use to verify that your GPINT-PT or GPUSB, computer, and scope mount are all working together properly. You can download them using the links found below. You should use this the first time you set up your system. You can also use it as a debugging tool anytime your system is not functioning properly. If your system works fine with GPINTCheck or GPUSBCheck, but not with your third-party software, then the problem most likely lies with the third-party software and you should contact them for technical support. If your system does not work with GPINTCheck or GPUSBCheck, then you should contact us for technical support. |
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Cedric Thomas has created a wonderful gathering spot for everyone interested in autoguiding. TheYahoo Autoguiding Group is a place where you can tap into the experience of hundreds of current and future autoguiding amateur astronomers. |
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USB Guide Port Interface |
$71.00 | ||
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USB Guide Port Interface for OLD Gemini |
$71.00 | ||
GPUSB User Manual Click here to view/download. (Requires Adobe Acrobat Reader) |
Absolutely Free | |||
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Install GPUSBCheck Click here to install the free software you can use to verify your GPUSB. |
Absolutely Free | |||
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Install GPUSB ASCOM Driver |
Absolutely Free | |||
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Parallel Port Guide Port Interface with Pass-thru |
$39.00 | ||
GPINT-PT User Manual Click here to view/download. (Requires Adobe Acrobat Reader) |
Absolutely Free | |||
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Install GPINTCheck Click here to install the free software you can use to verify your GPINT-PT. |
Absolutely Free | |||
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Guide Port Converter for Takahashi Mounts |
$18.00 | ||
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Guide Port Converter for SkySensor2000 |
$18.00 | ||
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Guide Port Splitter |
$7.00 | ||
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Guide Port Extension |
$6.00 | ||
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$4.00 | |||
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$6.00 | |||
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Guide Port Flat Cable, 25 feet (Actual cable not shown) |
$9.00 | ||
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(Color may vary) |
$8.00 | ||
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Guide Port Coiled Cord, 7 feet when extended (Actual cable not shown, color may vary) |
$10.00 | ||
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Guide Port Coiled Cord, 10 feet when extended (Actual cable not shown, color may vary) |
Discontinued | Discontinued | |
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Guide Port Cable Coupler If the cables above are not long enough, use this to join two together. |
$4.00 | ||
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Guide Port Conversion Kit for EQ-style mounts Parts needed to add an ST4 compatible guide port to an EQ-style dual axis handcontroller. |
$7.00 | ||
Instructions for GPKIT-EQ Click here to view/download. (Requires Adobe Acrobat Reader) |
Absolutely Free |