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| Guest |
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Joined: 10/15/2009
Posts: 55
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i made the cable with the 2 resistors as in the scheme, if not it doesn't work.
i can use the simulators, but the signal is inaccurate:
sometimes it's stable, sometimes it jump a bit around.
it also have some hysteresis (if i turn left, the neutral remains a bit at left, if i turn right, the neutral remains a bit at right).
there's a solution to this problem?
thanks
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| Shaul |
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Joined: 3/31/2009
Posts: 125
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Regarding the inaccuracy it ish ard to tell.
Here are a few ideas, assuming you are on PPM:
- The signal is indeed jumpy. Test it with your model.
- Your computer sound card is configured to low sample rate. Set it to 44K.
- If the instability increeses over time - you transmitter might be heating-up.
As for the histeresis, it may be caused by SPP, but if so it is hardly noticeable. More likely that it is caused by mechanical problem of the transmitter stick.
Keep me posted.
Shaul
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| Guest |
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Joined: 10/15/2009
Posts: 55
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sorry, i didn't expect you to be so fast, and i read the reply only now.
the radio is ok, (dx7) good sticks without looses and the model (hely) fly perfectly.
the sound card was in 48k, but nothing changes if i set it on 44k.
when i tried it the first time, i didn't made the cable with the resistors, and the signal was jumping everywhere, without follow the transmitter.
when i added the resistors, it worked, but it has always jumped a bit, as now.
can it depend by the resistors? i used resistors a bit different from the scheme.
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| Shaul |
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Joined: 3/31/2009
Posts: 125
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The resistors do not have to be identical. You have to keep the ratio between then (more-or-less) that shold be around 1:10 (1:8 to 1:20 will be OK) and that the sum of their values will be as specified (11KOhm) or higher.Make sure you solder the connector in parallel to the small resistor.
If the signal is still jumpy, please make an audio recording of the signal and either try to attach it to a post on this forum or just send it over to me - support-AT-SmartPropoPlus-DOT-com
Shaul
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| Guest |
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Joined: 10/15/2009
Posts: 55
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resistors are in the true parameters.
i sent you the audio of the signal (it's a wav)
i hope you can do something.
PS... sorry for the slow reply, i'll check more frequently the forum.
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