build a diy opentx clone frsky transmitter fromscratch

#Build a diy opentx clone frsky transmitter fromscratch how to#
#Build a diy opentx clone frsky transmitter fromscratch pdf#
#Build a diy opentx clone frsky transmitter fromscratch Bluetooth#

Leave the radio with the receiver ON, but turn the student transmitter OFF, and then ON again. The receiver should now bind and the LED should start flashing slower,about twice a second. Now turn ON the student's radio while holding the bind button on the RF module (DJT/DHT). Turn the teacher TX (has this RX installed) ON while holding the RX binding button. It might also work with the XJT in D8 mode but I don't have one to test.

#Build a diy opentx clone frsky transmitter fromscratch how to#

How to bind the receiver to another TX with a frsky DHT or DJT module. This allows the teacher transmitter to detect it and take control of the model immediately. When link is lost, the receiver will stop all pulses. Midelic wrote this version specifically for this trainer setup. Please note that the spacing between the RF module board's pins is only 1.2mm, that means, both sides will have to be very well lined up, and the drilling completely vertical.įrskyRx_Attiny85_SBUS_NOPULSE_4_DJTFIX.zip (6.23 KiB) Downloaded 285 times Then I do the same with the top, using the same method. When ironing the Bottom and top sides printed on Photo Paper, I first iron the Bottom side that has more covered surface and thicker tracks, after I lined it up using the previous drilled 0.8mm holes, and some needles. These will be used to line up both top and bottom printings when ironing them to the copper board. For that, I drill some 0.8mm holes through the vias around the board using a printing of the bottom side as template.

It can happen As I make my own PCBs at home, I have placed a few square vias around the board, and I use them to line up both top and bottom sides. Every side has 4 boards, just in case a couple might not come out good. One for the top side and another for the bottom side.

#Build a diy opentx clone frsky transmitter fromscratch pdf#

The zip file includes PDF files for etching the double sided PCB. I'm using slightly different circuitry for each of them on the receiver's SBUS output. Link to the latest test versions of Ersky9x:Ĭurrently i have this working on my 9xtreme radio as well as the Ar9x TX. That means, you have to configure the settings every time after you reboot the radio. This rx only receives (obviously ), so it should not interfere, and it should also use less current from the radio's battery.Īt the moment, Mike is still in the process of implementing this in Ersky9x, so the options to use this are only in the debug menus of the latest test versions of ErSky9x, and the settings are still not saved.

#Build a diy opentx clone frsky transmitter fromscratch Bluetooth#

The bluetooth receives and transmits, causing sometimes problems to the telemetry reception. I also think this little RX might have some advantages over the bluetooth, such as better range and less interference on the main RF signal. It is still possible to use another radio connected with a trainer cable as before, as it should override the receiver due to the resistor on the receiver's SBUS signal output. And it is a waste of energy anywayīut if you must use a 3 cell LiPo or LiFe, then I would recommend placing a 5V regulator before the LP2985 3.3V regulator. I would avoid connecting to 3 cell LiPo batteries, even if the LP2985 regulator is rated at 16V. I think that if you use a 2 cell LiPo battery or 6 NiMh cells, you could also power it from battery voltage. (See picture below).īoth 9xtreme and Ar9x boards have 5V available on pin headers (Expansion grid on the 9XT). In this case it is soldered to the backboard of the radio, to a solder pad that connects to the tip of the trainer Jack plug. The receiver outputs 8 channels SBUS and it connects internally to the trainer port.

Here is a video of it working on my 9XT radio: Good that I have bought from different sellers, or I would have been stuck. I do not recommend a seller called 'e-zealot' as I have never received my modules. Midelic developed the DIY FrSky D8 compatible receiversįor this project I used a little receiver based on the ATtiny85 microcontroller and on a low power CC2500 RF module. Let me start by thanking Mike and Midelic for making this possible.