26/10/2022 Another shard of the mosaic. I have completed an article with a sample program for handling the buttons on the EPS-103 unit and controlling the motors. I also briefly mention the use of the interrupt system. The specific example contains the code for HW interrupt RST7.5. It's just a tutorial that could have been written better. I preferred simplicity. Therefore, it is somewhat longer.
16/10/2022 I published an article in which I describe the procedures and necessary tools for writing your own program that can be run in the original EPS-103 unit. You can find it under the name Hello world. Too bold an idea? For me yes. Good luck to everyone else.
6/10/2022 The first article about a specific modification of the firmware in the EPS-103 unit. This is a guide on how to change the names of the satellites that appear on the device's display. And also a warning that you cannot believe everything that is written in the manual. Look here.
5/10/2022 I opened a new topic about modifications to the original EPS-103 control unit. I will publish here information about the original technical design including firmware and the possibilities of their modification. But this topic is not a priority for me. That's why I rather offer you others that I can collect information here, which you send to
2/10/2022 The download document Operation Manual EPS-103.pdf was originally just scanned. I rewrote the texts so that Google could translate them into other languages and cleaned up the remaining images. I recommend everyone who has already downloaded this manual to do it again.
29/9/2022 In the article HW 2.1 design I wrote a short talk about how I would imagine a PCB. Those who would like to try their hand at PCB design can download the diagram drawn in Eagle 8.2.0. in the section Files for download / For HW version 2.1.
28/9/2022 I finally managed to publish the HW Diagram version 2.1. The article also contains a short description of the connection and a table with the used components.
20/9/2022 I have added the EPR-203 Instruction Manual, EPS-103 Instruction Manual, and EPS-103 Schematic to the Files for downloads/Original documentation section. The EPS-103 manual is only scanned so far. I will try to rewrite it so that it can be translated into other languages using Google.
19/09/2022 The website was converted to the Joomla4 editorial system. The main change is the replacement of the original commenting system with a program from another company. To insert a new comment, it is necessary to enter a name and email. Most of the contributors provided their email address even before, when it was not mandatory. So it won't be an obstacle. I haven't used captcha user authentication yet. If links to inappropriate sites start to appear in posts, I will have to implement this measure.
Another change is the installation of a new program interface for downloading files. I believe that this system will prove itself. The program contains many settings that I have not yet explored and will turn on as needed. Uploading your files can be one of the new functions. I haven't decided yet if I'll allow something like that. If you would like to post any files on my website, please contact me by email
5/9/2022 Greetings to all fans of the EGIS positioner. I get a lot of questions asking if this site is still active. If the completion of the project with Raspberry Pi and any other new information appears here. Yes, I am preparing other new things, but unfortunately I have little time. It's just a hobby and I can't just dedicate myself to this site.
Among the bigger events that await me in the near future are:
1) Switch with the website to a new version of the Joomla4 editorial system. This is necessary and cannot be avoided. Unfortunately, the new version is in many ways incompatible with the existing version of Joomla3. So, for example, I can't work out the new comment system. I will not be posting any new information until I transition the site to a new editorial system. Of course, I allow exceptions.
2) The latest HW2.1 version project has stalled due to PCB design issues. After all, it is already quite a complex device, so even the printed circuit board will not be simple. I would like to preserve the possibility of production in amateur home conditions, and that complicates the situation even more. I use the Eagle program for PCB design. Unfortunately, I'm just learning with it, so I'm not doing very well. Once this website is converted to the new editing system, I will post the diagram drawn in Eagle so that anyone interested can try their hand at PCB design.
4) I have been contacted by people who would like to modify the original EPS-103 control unit.
Their main aim is to supplement communication with a PC / satellite receiver using RS232 or USB. Just like the newer egis-rotor products. Although I don't really believe in the success of such an effort, I decided to help them in this. I'm thinking of posting the EPS-103 documentation, EPROM dump, and other information we've already gotten our hands on. If others agree to it. I now devote most of my time to this activity.
There are many plans and time is running out. I know about it and I apologize to everyone who can't wait for new information. If anyone would like to actively participate and help me, write to
29/11/2020 - Added info on re-commissioning of the "drowned" control unit at the end of the article on the practical implementation of HW 1.0.
15/11/2020 - I am publishing the second version of the control program for HW 1.0. I've added presets that allow the positioner to automatically find the positions of 20 satellites. I do not expect the development of another version for HW 1.0.
You can find a description of the program here.
You can download the source texts of the program here.
5/11/2020 - I started working on the development of HW version 2.0. I moved the previous articles to version 1.0 to the archive. You can view them here, but I would like to point out that HW 1.0 is not compatible with the new version and due to time constraints I will no longer deal with it.
Added article on HW solution design version 2.0.
Added article containing diagram and description of HW version 2.0.
29/7/2020 - A link to my website about the Laminas 2700 dish has been added to the horizontal menu
3/6/2020 - Publication of the source code of the first test program
In the "Download" menu you will find the first test version of the program to verify the functionality of the designed device.
23/5/2020 - Software equipment
20/5/2020 - What about Superjack? Version for two traction motors
20/5/2020 - Printed circuit board design, practical design
14/5/2020 - Supporting structure for EGIS positioner
Description of the mast on which I will place the EGIS positioner. The construction is experimental and only time will tell if it can withstand adverse weather conditions, especially wind gusts. I'm going to attach a Polish Laminas 2700 antenna to the positioner. According to the technical data in the documentation, Egis should be able to handle it.
6/5/2020 - HW solution design
I published my proposal for the technical solution of the new control unit. Using a Raspberry Pi 3 computer seems to be economically acceptable. The additional interface is simple and can be manufactured at home. Maybe it will inspire someone.
14/4/2020 - Creating this website.
The reason was an attempt to collect relevant technical data on the EGIS shooting device in one place. On the one hand, Egis is considered a kind of "golden grail" of positioners, as evidenced by advertisements of people who are still trying to buy it. On the other hand, it is true that this device has become considerably morally obsolete over the years and its applicability in its original version is diplomatically debatable. I did not find much really technically valuable information on the net about practical use in terms of connection, commissioning and location. When I became the owner of the EGIS positioner, it soon became clear that nothing was what it seemed at first glance. And so the story began to unfold, which will appeal to enthusiasts in the field. And that's why I decided to publish it.