Gemini-2 and Gemini-1 Telescope Mount Controllers
Website and Tutorials by Thomas Hilton
only search
There is a new Question and Answer Wiki section where you can ask searchable questions.

All Gemini 1 Features +
  • Color Graphic Touch Screen clearly displays all functions
  • Hand controller supports English, Spanish, French and German languages.
  • Classic four-button pattern for guiding, centering, moving and slewing on both the touch screen and real tactile membrane switch panel.
  • Support for the original four-button controller (Losmandy Part # HC)-Not on the New Gemini-2 Mini Version.
  • For GM8, G-11, Titan, Titan 50, Titan HGM and MI-250 mounts.
  • Custom mount support using the Programmable Gear Rate function, with future support for Alt/AZ mounts.
  • 8°/sec Slew Rate (GM8).
  • 0.5 arc-sec positional accuracy.
  • DC Servos for improved accuracy with higher torque than stepper motors supports both the original Losmandy motors, Maxom Motors, and the new high torque Losmandy motors.
  • GPS-compatible with optional receiver.
  • Stand-alone system. No PC required!
  • Ethernet 10/100 with full DHCP/Static IP functionality permits operation from anywhere using a browser, or any ASCOM based application using the driver with the new web based interface. (IVP4 only).
  • Non-Volatile Memory and Real-Time Clock.
  • Both Hand controller and Main unit uses micro-SDcards (2gbyte recommended up to 32Gbyte max, SD and SDHC types supported).
  • Two Serial ports with +/-50V ground loop isolation. ( Com 2 is used for Graphics Hand Controller - set it to 57600 baud.)
  • Two USB ports; (USB-B, marked USB is functional now. USB-A for future support. USB-B has Windows driver producing a Virtual COM to PC, for connection by ASCOM or planetarium program.
  • Port E - end sensor support.
  • Port F - multi-function serial; A/D I/O (Feature Port)
  • Firmware upgrade via Ethernet, FTP or removing, programing and replacing the micro-SDcards, or the new Gemini Firmware Updater program (Requires Ethernet and Internet connection.)
  • User programmable star catalogs for both hand controller and Web based interface.
  • Android and I-Phone web control interface.
  • PEC correction.  Can save and restore PEC curves to micro-SDcards
  • Auto-Guide port (TTL). ST4 Compatible
  • Dual 12~18V DC input/output Jacks (3.0A) (Original Gemini-2 only. Mini version only has one jack.)
  • Web interface (only with Ethernet) that provides all functions of the hand controller and more.
  • With the new L5.1 Firmware and the new Servo Firmware, the Gemini-2 will be able to talk to the servo chips. The servo lags and PWM duty cycles are now available in real-time over the serial interface and a new Servo web page. Also, L5.1 supports Alt/Az mounts.
  • The New 5.2 Firmware added the following features.
    • Hand controller now shows low battery warning.
    • PEC now has a checkbox that can start it with tracking.
    • The Graphics on the newer Hand Controller can be inverted so the cord comes out the top.
    • New Store SRAM/Retreave commands added to the hand controller menus
Page last updated on Jun 10, 2016
Bottom page
This site is not for profit and sells nothing and asks for no money for any help it provides.  This site is here to help fellow Gemini-2 and Gemini-1 owners. This Web Site is not associated with Losmandy-Hollywood General Machining Inc. or any of their employees and never has been. There is no guarantee that all the information is correct, but strives to provide the best information possible. The use of any information is at your own risk.  The webmaster is an unpaid beta tester, and tries to work with other beta testers, and René the writer of the firmware.  If you would like to help keep this web site going send your gift to Your gift will be used to defray the cost of keeping this web site up, unless you specify otherwise.
Hit counter by Hit Counter by Digits
Your Privacy Policy
No Information is collected by this site.  Cookies are set in your browser, but only for visited
links to change color.
Your use of any information on this site is at your own risk.

Gemini-2 and Gemini is a registered trade names of Hollywood General Machining Inc.