openrcforums

Thank you. I forget the "open collector" and just drive high/low the Arduino output. I added a resistor voltage divider to limit the output to 3.3v. It seems OK with both the Taranis X7S and the TH9X. Next target will be the Hitec of a buddy as master ... Going on in the PPM port / buddy c...

The context: I am developing a buddy-box (with a 4 axes single stick) based on an Arduino Pro Mini 5V and generate the PPM signal for the RC master transmitter. It seems that RC transmitters use an open collector arrangement for trainer port management in order to prevent voltage mismatch and so I g...

oops ! my fault. Do'nt know what happened but now all is good. I suspect a bad contact with the jack, but not sure .... At first I used a 3mm male stereo jack and I am sure that I plugged / unplugged the jack many times, still having strange results. What is strange is that only the stop pulse looke...

OK, but the length of the stop pulse should be arround 300us / 500us (according to vairous "specification found on the web), varying with the pulse spacing parameter. Other parts of the frame seem OK, the time between the stop pulses varying with the sticks position within "standard" ...

Thank you for your help. I am no longer using the simulator dongle: just a USB logic analyzer, sampling at 24mhz I made the test with / without the module, with / without PPMSIM , with 6 channels, playing also with the pulse spacing parameter. I always get a waveform with the spacing pulses being ar...

I am using a Turnigy 9x, with standard Turnigy module,with ER9X r820 software(but it seems that it is in fact the r821 release) The module has been modify in order to not overload the PPM signal (well known "1k ohm" mod) I want to use the transmiter with a flight simulator with a USB inter...