In last two months we are working to new special console for control our drone , gimbal , rc models ... we develop a special application on android and some hardware interface for interconnect different kind of tx radio module. Our idea is to virtualize the hardware interface and have a flexible enviroment for control different kind of application.

This is only a preview of our work in the picture above is possible to see the direct interface with Jeti radio tx module.




In this kind of configuration the VR Droid PAD connect directly by a custom hardware the Jeti Tx module.

So is possible to use same reciver on your drone without change it. 








VR Droid RC is software that turns your Android smartphone or your pad into a powerful digital remote control for use with your radio model.
Is designed to be used on Rover or Drones or professional use. It 'sa project dynamic and evolving based on feedback from users of our community:

The main features are:
- Ability to manage up to 8 channels.
- 4 Channel standard for management ROLL, PITCH, YAW and Throttle.

- Auto Repositioning of 2 main stick when you put the finger on the screen.

- 5 additional channels of digital or analog.
- Management of the minimum and maximum for each channel.
- Management Trim
- Management subtrim.
- Reverse channel management.
- Configuration management esponeziali on standard channels.
- Management of up to two simultaneous feedback with vibration and sound feedback to throttle on the second audio output.
- Management mode 1,2,3,4 as standard RC trasmitter.
PPMSUM standard output compatible with the most 'popular radio modules tx.
Manages two modes: configuration and live to allow the maximum fluidity of the commands and the maximum configurability by users.

The current version is a preview suitable only for beta testing use it carefully.

Check the forum for have more detail about the application development

If anyone want to share their experiences testing/using this app, or want to discuss anything in my blog post´s this forum thread can be used here we add also the schematics of op amp for interface VR Radio RC to your pad.


This is our facebook fan page :


News on revision 1.4 27/03/2013

1) New name , we change the name to application the old was VR DROID RC Trasmitter , we change it in VR Radio RC , more simple , we change also the link in google play:) 

2) We deactivate the limit inside the application and add some special function for customize the widget available on main screen , we prefer mantain priority on control of drone . So on the scrreen you choose to have only virtual stick.

3) Add the configuration of radius of virtual stick it's customizable directly inside the option pannel.

4) Improve Option pannel its more simple and better organized.

5) Add the Expo control for the stick.

5) Add feeback on 3 channel : gas ( on 1 speaker channel) and pitch  (on vibro) is fixed and you can add 1 other feedback and decide if is on yaw or roll on vibro . 


This is the link at : Vr Radio RC rev 1.4 in  google play :


Try it and send us some suggestions for improve the application and the interface.



Roberto Navoni


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  • Roberto, the circuit of VR Droidpad is just using two non inverting amplifiers having gain of 2.4 for each channel.

    Though it worked but bit difficult to understand as to how various interframe delay achieved and why no schmit trigger  is used ?


  • Ken, LM358N works just great, two opAmps are required for two channels, one is for throttle feedback, Roberto may explain better. 

  • Rana: did the LM358N work?  Just wondering if the type of dual opamp makes a difference...usually, analog circuits are dependent on the type of opamp...

  • I assembled using LM358N (8 Pin DIP Package) on bread-board and dis-assembled in the last night tself, would soon make on a small multipurpose PCB' but at the moment. I have to leave for work.

  • Moderator

    are you connect the speaker output to LM258ADR ? Do you have a picture  ?



  • Roberto, Its working great !

  • Thank you, I have downloaded, it is based on LM258ADR, I shall make it right now using LM358P, which I am having at the moment.



  • Moderator

    This is the link to schematics that i'm using .



  • Hi Roberto ! Yes, I really mean to fix that position with an option in the configuration. You know the entire joystick base graphic moves hell lot of here and there,  I get much annoyed with that.

    I am also waiting to get the detail of the hardware interface schematic, the one you are using, so that I can make, test and report results to you.

    It would be great to see ver 2.



  • Moderator

    Hi Rana , 

    so the functionality of automatically reposition of joystick is developed for simplify the recenter of the stick ... do you mean to fix that position with an option in the configuration ? 

    Now in configuration is possible to reset the the diameter of circle so you can customize for your device ... the date is change because i change the name and revision of application From VR Droid RC Trasmitter to  VR Radio and is available a new revision 1.4  . So we are working on 2.0 where will be available also telemetry 



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