- Modifying the DJT - Flashing the radio with custom firmware - Telemetry screen
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Depending on your Operating System, choose the corresponding tutorial on how to install the drivers:
After installing the drivers you will need the following files
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The FrSky D8R-II Plus receiver is a diversity receiver which has 8 channels, and two other ports for telemetry data. If used together with a FrSky hub, you can use more sensor to get telemetry data and send them to your radio. The good thing about this radio is that it has two ports, which you can use to read telemetry data without a FrHub. To do that you will need a sensor and attache it in one of the two available ports (A1 or A2). I don't have a FrHub, so I will use one port (A1) to monitor the internal voltage of the receiver, and the other one (A2) to monitor the voltage of the airplane's battery, which is very important while flying RC. To monitor the internal voltage of the receiver, all you have to do is to install a jumper on the A1 and x pin (it usually comes preinstalled this way so you haven't removed the jumper for any reason, you don't need to do it). This way, after setting up the right values on the radio, you will receive the internal voltage data of your receiver on your screen.
To be able to receive the voltage data of the model's battery, you can buy a voltage sensor here or anywhere else online, or you can build it yourself. |
Frsky D8R-II Plus receiver doesn't CPPM and RSSI output, but since the FrSky D8R-XP has that possibility and they are both same from the schematic, we can flash the D8R-XP firmware to our D8R-II Plus and get the CPPM output on channel 1 and RSSI output on channel 2 while jumping signal pins on channel 3 and 4. There are 3 ways to do this. The first method is to use a FrSky programming cable, the second method is to use a FTDI cable and invert the RXD and TXD input/output using a program called FT Prog from FTDI Utilities, and the third method is to use a PC's serial port. I'm going to describe the third method. It is very simple.
Download: FrSkyUpdate software D8R-XP firmware
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Adding haptic to your 9XR radio is not difficult except for the part where you have to solder a wire to pin 43 of the Atmega chip. It is a very difficult job and not everyone can do it. Especially if you have done the telemetry mod before. The Atmega terminals are tiny and you should use a fine soldering iron tip and also thin wires. If you think you can't do it, you better leave it to a professional. If you think you are good at soldering than go ahead and do it. In both cases I would suggest to buy a spare Turnigy 9XR mainboard ($6.25).
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You can use a vibration motor from a cell phone and use the schematic to connect them to the main board. You can find one in an old phone (not that old that because it won't have vibration :) ) or you can purchase one online. There are two kinds that are mostly used on cell phones: the flat ones as shown in the picture on the right (I have installed this type) and the cylinder type ones. They are both same, so you can use either one of them. Another option is a toothbrush motor. It is easy, just follow the pictures. After you are done with the mod. Turn on the transmitter and navigate to Radio Setup and set the haptic strength you want.
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When you push the stock radio buttons, they feel too soft and you need to push hard to change menus or values. To improve the feel and the action of the buttons, you can solder some so called Tactile Push Button Switches. There are different ones, but you need those with this dimensions 4x4x1.5mm. I purchased them here (10 pc $1.18 free shipping). I did this mod after I had done all other mods, so with all the wires connected to the board, I couldn't remove the main board, so I opened the case, unscrewed the board, turned the radio upside down and used my helping hand to hold the radio that way so I could solder the buttons. Than you need to cut two diagonal legs as you can see in picture nr.4. I used scissors to cut the legs as deep as possible from the back site to avoid contact with the board. Than solder two remaining legs on the board like in the last picture. Test everything with with a multimeter. If you haven't done any mistake, put everything back in place and enjoy the new feeling of the buttons.
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The Turnigy 9XR is a great radio, but having a monitor on top of it for FPV flying would make it even better. So after i got two sets of Quanum DIY FPV Goggles, i decided to use one of them with my Turnigy 9XR. So i purchased the stand from Hobbyking, but until it arrives it will take some time, so i thought of using the the mounting brackets of my SJ4000 camera. I needed to cut the back of the monitor flat and glue one of the mounts on it using the double sided tape that was already glued on it. Than I used three parts of the mounts to form a stand which you can move in two directions. I soldered two wires inside the radio to the power and ground of the futaba port and using a connector I power on the monitor and the receiver from radio's battery. You could also use an external battery for this purpose. 850 mah or 1000 mah would be great choice. For more watch the video
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