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HelicopterRadio - Spektrum DSM › Spektrum and Futaba voltage info from John Adams
08-31-2009 07:09 PM  8 years agoPost 21
Frank Bostwick

rrElite Veteran

Cincinnati Ohio

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Well Sir, this is going off topic. Im 100% correct. Have a nice day.
(and thats the only time here on RR I have ever said that)
Sorry for post steppin'
Out

RIP ROMAN

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08-31-2009 07:10 PM  8 years agoPost 22
nivlek

rrProfessor

Norfolk England

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No Sir , you are mearly mistaken , a little knowledge often leads people down the wrong path .

At the end of the day , it gets dark .

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08-31-2009 07:12 PM  8 years agoPost 23
DoodrrProfessor - Wescanson - My Posts: All  Forum  Topic

At around Minute 3:12, when he powers on the receivers, the Futaba light actually comes on first.
Watch Closer, Terry. At 3:12, the light that first came on the Futaba rx was RED, meaning the rx had power but it was not yet connected.

A half second later, the lights came on the Spektrum rx's, indicating that they were powered on AND connected.

The Futaba rx didn't show a green light (indicating it was connected) until a split second later. Spektrum wins.

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08-31-2009 07:21 PM  8 years agoPost 24
TMoore

rrMaster

Cookeville, TN

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Watch Closer, Terry. At 3:12, the light that first came on the Futaba rx was RED, meaning the rx had power but it was not yet connected.

A half second later, the lights came on the Spektrum rx's, indicating that they were powered on AND connected.

The Futaba rx didn't show a green light (indicating it was connected) until a split second later. Spektrum wins.
All I stated was that the Futaba light came on first. Since I don't own a Futaba radio I can't tell if it is connected or not but here's a question. How is shutting off the power and coming back on a real test versus a brown out where the power is quickly ramped down to a low level but still present and then ramped back up as load decreases? Cycling power is one thing a real brown out is something else.

TM

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08-31-2009 07:26 PM  8 years agoPost 25
Romak

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Scotland

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Correction. I = V/R, Current = voltage divided by resistance.

Cheers

Rod
14sg....... ;-)

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08-31-2009 07:26 PM  8 years agoPost 26
DougV

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Miramar, Florida - USA (Ft. Lauderdale)

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LOL...I'm sure they're using the latest firmware on that Spektrum rx, but using an old discontinue R606 FASST receiver (one second delay), if I'm to use one of my AR7000 without the firmware usually takes about 5 to 9 seconds to reconnect after a power failure. Since they are using the latest Spektrum receiver with the latest firmware, they should use the latest FASST R617 gold dotted rx that connects instantly. Apples to apples right?

Doug

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08-31-2009 07:29 PM  8 years agoPost 27
nivlek

rrProfessor

Norfolk England

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I would still like to know at what voltage the servos stop working .
From the video , I saw that both systems stopped responding at 3V , but I can't be sure that it wasn't just that the servos stop at 3V .

At the end of the day , it gets dark .

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08-31-2009 07:29 PM  8 years agoPost 28
Romak

rrApprentice

Scotland

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Correction. I = V/R, Current = voltage divided by resistance.

Cheers

Apologies for posting twice!.

Rod
14sg....... ;-)

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08-31-2009 07:33 PM  8 years agoPost 29
nivlek

rrProfessor

Norfolk England

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Sorry , Romak , it was a typo after a few beers , hic .
I've corrected it now .

At the end of the day , it gets dark .

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08-31-2009 07:35 PM  8 years agoPost 30
TMoore

rrMaster

Cookeville, TN

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LOL...I'm sure they're using the latest firmware on that Spektrum rx, but using an old discontinue R606 FASST receiver (one second delay), if I'm to use one of my AR7000 without the firmware usually takes about 5 to 9 seconds to reconnect after a power failure. Since they are using the latest Spektrum receiver with the latest firmware, they should use the latest FASST R617 gold dotted rx that connects instantly. Apples to apples right?
Would they actually do that? That's just wrong right there.

IMHO, it's not a real test unless you have a full house setup with a gyro and governor, especially with the gyro rebooting and looking for center pulse.

TM

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08-31-2009 08:03 PM  8 years agoPost 31
greenboot

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Marblehead, OH

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The main goal was to demonstrate the JR receiver can reconnect instantly. They did a good job of showing that.
The fact that the gyro and other junk may lag could be a big problem and that's why the user needs to size the battery properly.
Showing an older model of Futaba, well that's a old marketing trick.

More volts = more current = better YouTube videos

Tom

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08-31-2009 08:06 PM  8 years agoPost 32
TMoore

rrMaster

Cookeville, TN

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Showing an older model of Futaba, well that's a old marketing trick.
Marketing trick or just plain deceitful?

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09-01-2009 10:05 AM  8 years agoPost 33
alfred

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Australia, New South Wales, Mid North Coast

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Well Sir, this is going off topic. Im 100% correct. Have a nice day.
(and thats the only time here on RR I have ever said that)
Sorry for post steppin'
Out
You Sir are 100% incorrect.
A Receiver is not a pure resistive or impedance device.
Analogue/Digital chips, Schmidt Triggers/FETs...etc makes using simple ohms law not possible.
At least not in such a straight forward way.

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09-01-2009 10:23 AM  8 years agoPost 34
alfred

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Australia, New South Wales, Mid North Coast

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How is shutting off the power and coming back on a real test versus a brown out where the power is quickly ramped down to a low level but still present and then ramped back up as load decreases? Cycling power is one thing a real brown out is something else.
Cycling power is exactly the same as a brown out. Once the voltage falls below a specific level,
the IC's/ CPU's/ Voltage regulator circuits won't work at all below a given voltage, it might as well have no voltage at all.
These devices will not turn "on" until a very specific minimum voltage has been reached.

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09-01-2009 11:54 AM  8 years agoPost 35
Frank Bostwick

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Cincinnati Ohio

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Like I said, Im off topic. I am not talking about the effects to the RX. Only to the servos and what happens as voltage drops.

RIP ROMAN

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09-01-2009 12:00 PM  8 years agoPost 36
stanc

rrKey Veteran

Conroe, TX

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Hey guys in reality what difference does it make. He who has flown Futaba is going to continue to fly Futaba 99% of the time and he who has flow Spektrum or JR is going to do the same. I've seen first hand guys that have always used Futaba change to Spektrum, but went right back to Futaba and vise verse.
Maybe the demo wasn't equal because of the Futaba RX, but again what difference does it make at the end of the day, your still going to use what you've been using.
I for one don't think John should have posted that video, because of what he started here.

Stan
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eAvro90

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09-01-2009 12:05 PM  8 years agoPost 37
Dood

rrProfessor

Wescanson

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I for one don't think John should have posted that video, because of what he started here.
"jadams" on RunRyder is not John Adams from Horizon.
It's easy to see how someone could make that assumption.

John Adams from Horizon is known on RR as simply "Adams"

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09-01-2009 12:19 PM  8 years agoPost 38
stanc

rrKey Veteran

Conroe, TX

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Dood
"jadams" on RunRyder is not John Adams from Horizon.
It's easy to see how someone could make that assumption.

John Adams from Horizon is known on RR as simply "Adams"
You might be right but if you start the video from the beginning, he states he is the Technical Director for Spektrum. That sure leads me to believe he is John Adams from Horizon.

Stan
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eAvro90

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09-01-2009 12:22 PM  8 years agoPost 39
Dood

rrProfessor

Wescanson

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Yes I know who the guy in the video is. Thats John Adams from Horizon.
But John Adams from Horizon did not start this thread on RR.

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09-01-2009 12:31 PM  8 years agoPost 40
stanc

rrKey Veteran

Conroe, TX

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I gotya, then John Adams from Horizon shouldn't have made the video.

Stan
2- Logo 500
Ion X2
eAvro90

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HelicopterRadio - Spektrum DSM › Spektrum and Futaba voltage info from John Adams
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