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HomeAircraftHelicopterFlybarless Rotor Head SystemsV-Bar › Another Mini Vbar Governor question
06-26-2014 12:53 AM  3 years agoPost 1
AndyH

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Rockledge, FL

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I know that the spektrum sat port puts out 3.3v so it's a good option to power the phase sensor if your running a HV setup, but has anyone y'd the cable to a satellite (using spektrum not futaba) and tapped power to the phase sensor? Will that work, anybody tried that and we're there any issues? Seems easier than stepping down the voltage from one of the other ports. Sorry, just never saw this exact configuration called out and was wondering if there were any issues.

This hobby is like Kryptonite to chicks!

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06-26-2014 08:14 AM  3 years agoPost 2
Sam2b

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Tacoma, WA

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Hi. If you have two satellites, try it. The sensor shouldn't require much, however maybe the satellite is sensitive any alteration like this(?).

But, it would be wise to do a range check without any blades on while running the motor in idle up. Have a friend assist to help, and monitor heli and satellite lights for blinking, etc.

_Sam B_

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06-26-2014 12:57 PM  3 years agoPost 3
LaDon

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Fort Dodge .Ia

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I run the hobby wing sensor on one of my set ups and I think if you read it close 3.3 volts is the least you can run. I am at work so I don't have one in front of me but I think you can run more voltage to it. Anyway I am mine and it is working well and has been for a while. Re read the directions close because it is easy to miss that as they don't explain it very well

Team Jr

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06-26-2014 04:49 PM  3 years agoPost 4
AndyH

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Rockledge, FL

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So, you were running two satellites and tapped one of them to run the sensor? Correct?

No problems?

The problem I'm trying to work around isn't the sensor supply voltage but the signal level being presented to the input pin in the mini Vbar. It maxes out at 5v, and I'm running an HV system. So just using a 3.3v supply for the sensor would keep the sensor out level low enough to work without having to build the voltage divider harness that's shown on the Vbar site. Just trying to save myself the trouble and am curious if anyone else had done what I was suggesting.

Theoretically it should work, but sometime receivers can be weird.

This hobby is like Kryptonite to chicks!

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06-26-2014 09:51 PM  3 years agoPost 5
Ronald Thomas

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Gainesville, Fl, USA

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If you tap from the sat port, that will be on the back side or the regulator inside the VBAR. Mikado does not recommend that. You need to step the voltage down a different way or get a FS VBAR...

Team MikadoUSA 480XXTreme, 550SX, 600SX, 700XXTreme, 800XXTreme!!

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06-26-2014 10:58 PM  3 years agoPost 6
LaDon

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Fort Dodge .Ia

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Ok Andy I am guessing you have the same hobbywing rpm sensor I have. It says Hobbywing brushless rpm sensor right on the little unit. If it is that particular one the 3rd line in the specs says the working voltage is 3.5 to 8.4 volts. 1S to 2S lipo That is exactly what it says. Looks like the part number is HW-SM824DUL-rpm sensor Anyway that is the number on the top of the instructions. I am using that one and just have it hooked up directly to an open port. If you have that one don't worry about stepping it down from your receiver voltage as it will be ok. I have used this one for quite a while with no problems. I really don't think I would hook it up to the sats if you don't have this one. If you don't have this one I would buy one as they were only just a few dollars.

Crap I might be understanding you wrong here. Are you asking if the signal wire puts out more than 3.3 volts to the mini vbar? You will need to build a jumper no matter what. You will need to take the power wire and negative out of the 3 wire plug and hook them to power and the signal wire will go to the sensor port by itself. You cannot hook any power to any of the three pins on the sensor port on the mini vbar. You don't need to step down voltage on the signal wire. It is a signal wire not a power wire

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06-27-2014 02:54 AM  3 years agoPost 7
AndyH

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Rockledge, FL

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What's the amplitude of the signal coming in on the signal wire though? I suspect there's no step down on the phase sensor board, so the amplitude of that signal will be at 8.4 V, which will blow the vbar.

http://www.vstabi.info/en/node/1306

I guess I just have to do this. Seemed easier to just power the sensor with 3.3 to begin with, like you'd do with a full size vbar. The setup video's show that if you're using the Sbus you can use the spektrum ports to power it, I was just wondering if you were using spektrum satellites could you y off one of them. Guess not. Oh well.

This hobby is like Kryptonite to chicks!

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06-27-2014 04:08 AM  3 years agoPost 8
LaDon

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Fort Dodge .Ia

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Well I would do it exactly as vstabi shows it then
That way you know it is right it don't look to hard to do

Team Jr

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