GoTo Telescope Control for rDUINOScope

Standalone Hardware Control Unit for use with "rDUINOScope" Firmware

Similar projects worth following
Sorry for my bad english grammar...

This hardware project is "Open Source" and for all "Private-Uses"!
Comercial User (Companies) should ask me for the mass production rights!

1. Picture is the complete Telescope-Control-Unit, incuded the "Arduino DUE" Board.
2. Picture is the control unit with look at the bottom side, this can be odered by me.
3. Picture is the driver unit for the two stepper motors and joysick hand control unit.
4. Picture is the Schematics of the hardware, for user, who want to to bild it by self...
The last two pictures are the PCBs, top and bottom side.

The advantage of this hardware project is, it is not more expensive than the separately purchased components and you only need to connct it to "Arduino DUE" Board, load the "rDUINOScope" software and let it run & enjoy to look at the amazing sky...

The new enhanced Motor Driver is reloaded...

Here the Videoclip:
rDUINOScope New Driver Board


The enhanced Version V1.4c is finished and can ordered in 3 weeks!

The enclosure is only a prototype and can ordered some weeks later...

The next Version V1.4.1 brings some more enhancements, like new Joystick with high accuracy digital intrface for a very precise manual aligning of your Telescope!

The whole height of the device will be only 28.3mm! 

The bottom side of the housing is made of 1.5mm aluminum and is used as heatsink for the motor drivers!

It could be operated without a fan...

This Version is planed to finished and could be ordered, probably at the end of this year.

The price for the assembled and tested Controller, without enclosure cost $205 including the shipping costs.

For the Version wiht enclosure, the price is not fixed yet. Some Users could make it with 3D Printing.

It would be 3D printable and the STL-Data can be downloaded here.


This hardware design is for the open source project of "rDUINOScope", designed by
Dessislav Gouzgounov (Bulgaria) and with helping of community of over 200 members!
The whole Project Home is here:

The newest Controller V1.4c can be ordered here:
It is assembled and tested and will be shipped without Arduino DUE and without Motors.

The "rDUNINOScope Control V1.3 (or newer) Unit works only with Arduino DUE or compatible Boards and the "rDUINOScope" Software!

The Stepper Motor Driver section is designed for max 1A / phase (2A / Motor).
The Driver (Texas DRV8825) is configurable with up to 32 Microsteps. It is changed from DRV8846!
No external Heatsink needed, beacuse the PCB has the same function and it is big enough.

My tests have shown that, in my case, 1A / Phase is sufficient for NEMA 17 stepper Motors.

If we need more Motor Power (NEMA 23/24) then we can connect a "Bosst-Stage"
for up to 4-5A / phase!

Never disconnect any motors, so long the driver board is powerded to 12V!
The motor driver chips could be demaged (burned), see the picture below!

This system is designed modular, we can very easy change the Motor Driver Unit to other Driver like TMC2660 with up to 256 Microsteps, SPI control and higher Motor current, thus we get many Arduino Ports free for new Hardware control...

The Full-HD Videoclip ist here:


The initial and the current Version 1.4c are Open Source Hardware and probably the 1.xx Versions at all.

From the Version 2.0x we will sell it only as assembled and tested Hardware, because of high complexity.
It will be a Standalone Version with own Processor, without Arduino or any external Modules.
One PCB in a case without any cablel, because of Wireless controlling the Motors and other Hardware!
The Controller runs with a Lithium Cell, (3700 mAh) and it would working over 9-10 hours.
For the two Motors we need an extra Power Stage with 15-20 Ah for the same Time.

The Version 2.0 and higher, will no more Open Source, it is a Comercial Harware and can ordered only by me.
This High End Controller brings several new functions like Auto Guiding and multi channel Wireless for connecting to Home PCs, Notebooks, Tablets and Mobilephones.
The new Highend Controller comes with 5 Inch IPS Touchscreen with 800x480 pixel resolution.
I'm planing two different Controller. One without own Display that can only using with Notebook or PC.
The second Version is a Standalone with 5 Inch Touchscreen. Both Versions will be Cable free!

All this needs lot of design Time and it could be probably finished, at the middle or at the end of the next Year...


The Version V1.4a has some little changes, because of compatibility to the Firmware 2.3_Boiana_EQ and bellow. Some PCB Layout optimisations was maded to better soldering some parts.

JPEG Image - 1.04 MB - 06/20/2017 at 23:11



It is the Version 1.4 of the Schematics with DRV8825 stepper Drivers. This Drivers, can drive, up to 2,2A with sufficient (heatsink) cooling...

JPEG Image - 1.08 MB - 06/11/2017 at 21:03



This is a 3D Videoclip of the control Unit.

MPEG-4 Video - 49.94 MB - 05/06/2017 at 21:18



Full list "Bill of Material" for rDUINOScope Control V1.3

Adobe Portable Document Format - 66.20 kB - 04/29/2017 at 08:02


Bill of Material.pdf

The BOM is only a simple & rough composition! If somebody need a detailed one, download this above...

Adobe Portable Document Format - 203.94 kB - 04/28/2017 at 22:47


View all 6 files

  • 1 × Adruino DUE Board (not Included)
  • 1 × Bluetooth Modul HC-06
  • 1 × Humidity Sensor DHT22-G
  • 2 × Stepper Motor Driver DRV8825
  • 1 × U-Box GPS Modul NEO-6M

View all 14 components

View all 7 project logs

  • 1
    Step 1

    For assembling of this harware we need a good knowledge
    in soldering of very small SMT components.
    Some SMT Pads, has a gap of only 0.2mm, see the picture bellow!

    The assembled unit must be tested with rDUNOScope Firmware
    and if it works, is fine...
    My experiences had showing, that the China parts like TFT Display,
    does not always work!
    It can lie on the defective Display or we have a soldering fault...
    In this case we need to figure out where is our problem
    and we need an oscilloscope!

    For soldering of Stepper Driver Chip DRV8846 or DRV8825,
    we need a special soldering oven, because this Chips has a Exposed Pad
    for dissipation of heat! We can not solder this with solder pen,
    because the Pad is on the bottom side of the Chip!

    I think, the better way to sell this unit as tested and working assembly.

    If someone wants to bild it himself,
    no problem but on own responsibility!

View all instructions

Enjoy this project?



Wellingtonsmoura wrote 07/19/2017 at 20:05 point

I am interested in buying, very interesting your project. Let me know how we can handle a possible purchase.

  Are you sure? yes | no

Otto Winter wrote 07/20/2017 at 19:05 point

Thank You for Your interesting to bay this Hardware! :-)
Actually I don't have any assembled Conroller, because of redesigning & many improvements.
The next working controllers (V1.4b) could be finished in 3-4 Weeks.
Sorry for the long delaying, but I've to order new PCBs next week!

  Are you sure? yes | no

Otto Winter wrote 07/21/2017 at 18:26 point

You can bay the assembled and tested controller for $205.
This price including the PayPal & shipping costs.

  Are you sure? yes | no

Otto Winter wrote 07/19/2017 at 01:29 point

Yes, You can run both from a 12V 2A+ but for two motors, better 4A+!

  Are you sure? yes | no

Lee Maisel wrote 07/19/2017 at 01:23 point

SHOULD I supply power separately to the motor driver circuit? OR can I run both from the same 12v 2A+ supply??


  Are you sure? yes | no

Otto Winter wrote 07/21/2017 at 18:22 point

You can connect it together, because it is better to separate it, if it is possibile...
The Stepper Motors generate much of "EMC interference" that could influense the Arduino Board Functions!

  Are you sure? yes | no

Otto Winter wrote 07/21/2017 at 18:23 point

The EDA (CAD) files are not published and because it was designed with Altium!

The most people working with Eagle...
I will publish the GERBER Files for User, they want to produce the PCBs it self.

  Are you sure? yes | no

Lee Maisel wrote 07/18/2017 at 18:13 point

I have received my rDuinoScope 1.4 unit from Otto, and it is a MASTERPIECE!!!  Beautiful construction!!   THANK YOU!!!

  Are you sure? yes | no

Otto Winter wrote 07/21/2017 at 18:16 point

Thank You and enjoy it and good luck for all experiences!

  Are you sure? yes | no

Otto Winter wrote 07/04/2017 at 19:46 point

Yes, the Version 1.4x is Open Source HW and for the later Versions 1.5x-1.9x probably to.
From the Version 2.0 we will sell it only as assembled and tested Hardware, because of high complexity and it is a Standalone Version, without Arduino or any external Modules.
One PCB in a case without any cable! It will controll the Motors over Wireless!
With one Lithium Cell, (3700 mAh) it would work over 9-10 hours.
For The Motors we need an extra Power Stage with 15-20 Ah for the same Time.

  Are you sure? yes | no

madhu nuggehalli wrote 07/05/2017 at 14:30 point

Thanks for this info! where can I find the CAD files? I would like to make a PCB and check it out.

  Are you sure? yes | no

madhu nuggehalli wrote 07/04/2017 at 16:21 point

Hi Otto,

Will this project be OSHW at all?


  Are you sure? yes | no

Lee Maisel wrote 06/26/2017 at 23:01 point

How can I purchase the PCB's please?  Thank You  WONDERFUL Project!!

  Are you sure? yes | no

Otto Winter wrote 06/27/2017 at 11:24 point

Hello Lee, Thanks for your interesting!
For now I sell only assembled and tested units, because it is to complicated
to be assembly yourself.

  Are you sure? yes | no

Lee Maisel wrote 06/27/2017 at 17:09 point

I'm ready to buy,  How do I proceed?  Thanks!

  Are you sure? yes | no

Lee Maisel wrote 06/26/2017 at 22:36 point

Also, are the custom boards OR completed units for sale?

  Are you sure? yes | no

Otto Winter wrote 06/27/2017 at 11:27 point

The assembled & tested Board cost 150 € or 170 USD + shipping costs.
Without stepper motors and without Arduino DUE Board!

  Are you sure? yes | no

Lee Maisel wrote 06/27/2017 at 20:15 point

Thanks!  Let me know where to order. :)

  Are you sure? yes | no

Otto Winter wrote 06/27/2017 at 11:21 point

Hello Lee, thank you for your interest of my harware.
I'm using a single TFT and not an assebly like in the Link you posted.
Please read all my Project informations and you will see, that this hardware
project not to be compared with modular assemblys...

  Are you sure? yes | no

Diego Dabrio-Polo wrote 06/19/2017 at 09:16 point


• Probably this is not the right place to post this comment, and maybe I should write a Private Message. I do not know to whom I should write of how to do it.

I do not know the etiquette rules of this site yet, and I prefer to be extra-cautious.

I have just joined Hackaday because of this stunning rDUINOscope Control project.

I am an amateur telescpe maker and I need a control unit, that can work either standalone or connected to a PC or android device (with Stellarium)

I also need to be able to use my own stepper motors with their specific step count.

Therefore, this project suits me perfectly.

I have been looking for something like this for ages!

• I want to make a rDUINOscope Controller, and I want to make one and test it as soon as possible.

I am ready to buy all the pieces from eBay or Aliexpress, but I need the PCBs. I imagine you can provide them. I would like to buy a bundle (a kit with all the items) from you, if possible.

• I would like to join your project and get involved in it, but I do not know if you need me, because my programming skills are very basic.

I can solder pretty well, and I could test the controller of contribute in other forms.

• I would like also benefit from the V 1.5 version of the project, but if you have old V 1.3 or V 1.4 PCBs that you want to get rid of, I can buy them and make an older version.

In fact I do not know if different versions of the rDUINOscope Control share PCBs

I also do not know when V 1.5 will be ready. I can wait, but I am so eager...

Thank you, 

Best regards


  Are you sure? yes | no

Otto Winter wrote 06/19/2017 at 21:21 point

Thank you for the message, it is arrived on the right place...
I'm  working on the V1.5 but the changes are much more as planed.
The V1.4a is the latest working version and it  is 100% compatible to rDUINOScope code from Dessislav.
New PCBs V1.4.a would be available in about 2-3 weeks.
The V1.5 Version takes probably more then 4-5 weeks, sorry...

  Are you sure? yes | no

Gianluca wrote 04/28/2017 at 18:21 point

Sent a Private Message

  Are you sure? yes | no

Otto Winter wrote 04/27/2017 at 11:06 point

For all Users, Likers, Followers, tahank you for your interest on this usefull project!
I'm shure, that this hardware unit, could help, for many telescope owners, who do'nt have any positioning control unit, because they are too expensive.
This hardware is build up modular and can easy customized for different requirements...
Any suggestions or constructive criticism, are welcome!

  Are you sure? yes | no

Similar Projects

Does this project spark your interest?

Become a member to follow this project and never miss any updates